/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:16:01,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:16:01,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:16:01,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:16:01,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:16:01,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:16:01,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:16:01,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:16:01,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:16:01,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:16:01,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:16:01,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:16:01,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:16:01,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:16:01,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:16:01,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:16:01,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:16:01,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:16:01,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:16:01,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:16:01,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:16:01,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:16:01,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:16:01,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:16:01,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:16:01,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:16:01,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:16:01,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:16:01,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:16:01,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:16:01,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:16:01,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:16:01,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:16:01,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:16:01,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:16:01,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:16:01,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:16:01,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:16:01,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:16:01,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:16:01,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:16:01,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:16:01,564 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:16:01,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:16:01,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:16:01,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:16:01,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:16:01,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:16:01,566 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:16:01,566 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:16:01,566 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:16:01,566 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:16:01,566 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:16:01,567 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:16:01,567 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:16:01,567 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:16:01,567 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:16:01,567 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:16:01,567 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:16:01,567 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:16:01,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:16:01,568 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:16:01,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:16:01,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:16:01,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:16:01,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:16:01,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:16:01,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:16:01,568 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:16:01,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:16:01,569 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:16:01,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:16:01,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:16:01,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:16:01,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:16:01,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:16:01,569 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:16:01,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:16:01,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:16:01,570 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:16:01,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:16:01,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:16:01,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:16:01,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:16:01,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:16:01,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:16:01,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:16:01,782 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:16:01,782 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:16:01,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2023-03-31 23:16:02,822 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:16:02,949 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:16:02,950 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2023-03-31 23:16:02,954 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5b7f108d/9e7aecb97b624b08b32f2defa1e8c6e4/FLAGe60d4caae [2023-03-31 23:16:02,964 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5b7f108d/9e7aecb97b624b08b32f2defa1e8c6e4 [2023-03-31 23:16:02,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:16:02,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:16:02,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:16:02,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:16:02,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:16:02,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:16:02" (1/1) ... [2023-03-31 23:16:02,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d8a0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:02, skipping insertion in model container [2023-03-31 23:16:02,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:16:02" (1/1) ... [2023-03-31 23:16:02,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:16:02,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:16:03,100 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/egcd2-ll_unwindbound100.c[490,503] [2023-03-31 23:16:03,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:16:03,121 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:16:03,129 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/egcd2-ll_unwindbound100.c[490,503] [2023-03-31 23:16:03,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:16:03,146 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:16:03,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03 WrapperNode [2023-03-31 23:16:03,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:16:03,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:16:03,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:16:03,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:16:03,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (1/1) ... [2023-03-31 23:16:03,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (1/1) ... [2023-03-31 23:16:03,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (1/1) ... [2023-03-31 23:16:03,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (1/1) ... [2023-03-31 23:16:03,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (1/1) ... [2023-03-31 23:16:03,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (1/1) ... [2023-03-31 23:16:03,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (1/1) ... [2023-03-31 23:16:03,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (1/1) ... [2023-03-31 23:16:03,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:16:03,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:16:03,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:16:03,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:16:03,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (1/1) ... [2023-03-31 23:16:03,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:16:03,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:03,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:16:03,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:16:03,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:16:03,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:16:03,228 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:16:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:16:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:16:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:16:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:16:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:16:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:16:03,280 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:16:03,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:16:03,399 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:16:03,414 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:16:03,414 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:16:03,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:16:03 BoogieIcfgContainer [2023-03-31 23:16:03,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:16:03,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:16:03,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:16:03,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:16:03,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:16:02" (1/3) ... [2023-03-31 23:16:03,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f5c7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:16:03, skipping insertion in model container [2023-03-31 23:16:03,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:16:03" (2/3) ... [2023-03-31 23:16:03,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f5c7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:16:03, skipping insertion in model container [2023-03-31 23:16:03,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:16:03" (3/3) ... [2023-03-31 23:16:03,422 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2023-03-31 23:16:03,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:16:03,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:16:03,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:16:03,474 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;@3d23ec6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:16:03,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:16:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 19 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 23:16:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 23:16:03,502 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:03,502 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:03,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:03,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:03,506 INFO L85 PathProgramCache]: Analyzing trace with hash -31319789, now seen corresponding path program 1 times [2023-03-31 23:16:03,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:03,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270840601] [2023-03-31 23:16:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:03,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:03,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:03,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082364386] [2023-03-31 23:16:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:03,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:03,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:03,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:03,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:16:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:03,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 23:16:03,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:16:03,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:16:03,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:03,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270840601] [2023-03-31 23:16:03,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:03,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082364386] [2023-03-31 23:16:03,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082364386] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:16:03,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:16:03,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:16:03,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931119322] [2023-03-31 23:16:03,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:16:03,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:16:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:03,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:16:03,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:16:03,740 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 19 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:16:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:03,760 INFO L93 Difference]: Finished difference Result 58 states and 89 transitions. [2023-03-31 23:16:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:16:03,762 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 23 [2023-03-31 23:16:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:03,767 INFO L225 Difference]: With dead ends: 58 [2023-03-31 23:16:03,767 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 23:16:03,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:16:03,771 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:03,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:16:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 23:16:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-31 23:16:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:16:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-03-31 23:16:03,800 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 23 [2023-03-31 23:16:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:03,801 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-03-31 23:16:03,801 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:16:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-03-31 23:16:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 23:16:03,802 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:03,802 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:03,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:04,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 23:16:04,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:04,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2036778731, now seen corresponding path program 1 times [2023-03-31 23:16:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:04,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188087744] [2023-03-31 23:16:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:04,038 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:04,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361096471] [2023-03-31 23:16:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:04,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:04,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:04,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:16:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:04,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:16:04,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:16:04,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:16:04,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:04,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188087744] [2023-03-31 23:16:04,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:04,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361096471] [2023-03-31 23:16:04,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361096471] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:16:04,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:16:04,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:16:04,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642676805] [2023-03-31 23:16:04,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:16:04,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:16:04,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:04,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:16:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:16:04,159 INFO L87 Difference]: Start difference. First operand 31 states and 42 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:16:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:04,182 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2023-03-31 23:16:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 23:16:04,183 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2023-03-31 23:16:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:04,183 INFO L225 Difference]: With dead ends: 41 [2023-03-31 23:16:04,183 INFO L226 Difference]: Without dead ends: 33 [2023-03-31 23:16:04,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:16:04,185 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:04,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:16:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-03-31 23:16:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-03-31 23:16:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:16:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-03-31 23:16:04,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 24 [2023-03-31 23:16:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:04,192 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-03-31 23:16:04,192 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:16:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-03-31 23:16:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 23:16:04,193 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:04,193 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:04,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:04,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 23:16:04,399 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:04,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:04,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1282399699, now seen corresponding path program 1 times [2023-03-31 23:16:04,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:04,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581992054] [2023-03-31 23:16:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:04,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:04,415 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:04,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722690973] [2023-03-31 23:16:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:04,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:04,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:04,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:04,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:16:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:04,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 23:16:04,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:16:04,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:16:04,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581992054] [2023-03-31 23:16:04,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722690973] [2023-03-31 23:16:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722690973] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:16:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989045960] [2023-03-31 23:16:04,552 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-03-31 23:16:04,552 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:04,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:04,558 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:04,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:04,613 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:04,900 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:04,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:04,909 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:05,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1989045960] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:16:05,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:05,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 18 [2023-03-31 23:16:05,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067870509] [2023-03-31 23:16:05,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:16:05,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 23:16:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 23:16:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-03-31 23:16:05,328 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 15 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:16:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:06,292 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-03-31 23:16:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 23:16:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 25 [2023-03-31 23:16:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:06,294 INFO L225 Difference]: With dead ends: 42 [2023-03-31 23:16:06,294 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 23:16:06,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:16:06,295 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:06,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:16:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 23:16:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-03-31 23:16:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:16:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2023-03-31 23:16:06,302 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 25 [2023-03-31 23:16:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:06,302 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2023-03-31 23:16:06,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:16:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2023-03-31 23:16:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 23:16:06,303 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:06,303 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:06,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:06,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:06,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:06,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:06,513 INFO L85 PathProgramCache]: Analyzing trace with hash -178524094, now seen corresponding path program 1 times [2023-03-31 23:16:06,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:06,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256171307] [2023-03-31 23:16:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:06,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:06,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345856496] [2023-03-31 23:16:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:06,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:06,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:06,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:16:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:06,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:16:06,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:16:06,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:16:06,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:06,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256171307] [2023-03-31 23:16:06,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:06,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345856496] [2023-03-31 23:16:06,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345856496] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:16:06,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:16:06,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-31 23:16:06,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45331007] [2023-03-31 23:16:06,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:16:06,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:16:06,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:06,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:16:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:16:06,650 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:16:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:06,760 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-03-31 23:16:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:16:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 27 [2023-03-31 23:16:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:06,761 INFO L225 Difference]: With dead ends: 40 [2023-03-31 23:16:06,761 INFO L226 Difference]: Without dead ends: 38 [2023-03-31 23:16:06,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:16:06,762 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:06,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 110 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:16:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-31 23:16:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-03-31 23:16:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:16:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-03-31 23:16:06,770 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2023-03-31 23:16:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:06,770 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-03-31 23:16:06,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:16:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-03-31 23:16:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 23:16:06,771 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:06,771 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:06,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:06,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:06,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:06,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash -126473874, now seen corresponding path program 1 times [2023-03-31 23:16:06,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:06,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566017618] [2023-03-31 23:16:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:06,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:06,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:06,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815647380] [2023-03-31 23:16:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:06,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:06,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:06,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:07,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:16:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:07,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 23:16:07,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:16:07,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:16:07,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:07,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566017618] [2023-03-31 23:16:07,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:07,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815647380] [2023-03-31 23:16:07,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815647380] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:16:07,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:16:07,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:16:07,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693137620] [2023-03-31 23:16:07,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:16:07,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:16:07,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:07,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:16:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:16:07,086 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:16:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:07,104 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2023-03-31 23:16:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:16:07,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2023-03-31 23:16:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:07,105 INFO L225 Difference]: With dead ends: 63 [2023-03-31 23:16:07,105 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 23:16:07,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:16:07,106 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:07,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:16:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 23:16:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-03-31 23:16:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:16:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-03-31 23:16:07,113 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 30 [2023-03-31 23:16:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:07,113 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-03-31 23:16:07,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 23:16:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-03-31 23:16:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 23:16:07,114 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:07,114 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:07,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 23:16:07,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:07,319 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:07,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1025883745, now seen corresponding path program 1 times [2023-03-31 23:16:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:07,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805842578] [2023-03-31 23:16:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:07,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:07,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:07,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28440932] [2023-03-31 23:16:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:07,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:07,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:07,335 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:07,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:16:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:07,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-31 23:16:07,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:16:07,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:16:07,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:07,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805842578] [2023-03-31 23:16:07,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:07,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28440932] [2023-03-31 23:16:07,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28440932] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:16:07,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:16:07,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-03-31 23:16:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516324970] [2023-03-31 23:16:07,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:16:07,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:16:07,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:07,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:16:07,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:16:07,601 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 23:16:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:07,696 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-03-31 23:16:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:16:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2023-03-31 23:16:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:07,700 INFO L225 Difference]: With dead ends: 54 [2023-03-31 23:16:07,700 INFO L226 Difference]: Without dead ends: 52 [2023-03-31 23:16:07,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-03-31 23:16:07,701 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:07,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 124 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:16:07,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-03-31 23:16:07,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-03-31 23:16:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:16:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-03-31 23:16:07,710 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 32 [2023-03-31 23:16:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:07,710 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-03-31 23:16:07,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 23:16:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-03-31 23:16:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 23:16:07,717 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:07,717 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:07,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:07,917 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 [2023-03-31 23:16:07,918 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:07,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash 642777954, now seen corresponding path program 1 times [2023-03-31 23:16:07,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:07,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097036551] [2023-03-31 23:16:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:07,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:07,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177614202] [2023-03-31 23:16:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:07,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:07,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:07,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:07,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:16:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:07,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-31 23:16:07,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 23:16:08,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:16:08,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:08,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097036551] [2023-03-31 23:16:08,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:08,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177614202] [2023-03-31 23:16:08,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177614202] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:16:08,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:16:08,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-03-31 23:16:08,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031082825] [2023-03-31 23:16:08,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:16:08,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:16:08,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:16:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:16:08,135 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:16:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:08,183 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-03-31 23:16:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:16:08,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2023-03-31 23:16:08,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:08,184 INFO L225 Difference]: With dead ends: 58 [2023-03-31 23:16:08,184 INFO L226 Difference]: Without dead ends: 56 [2023-03-31 23:16:08,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:16:08,185 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:08,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:16:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-03-31 23:16:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-03-31 23:16:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:16:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2023-03-31 23:16:08,194 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 37 [2023-03-31 23:16:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:08,194 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2023-03-31 23:16:08,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 23:16:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2023-03-31 23:16:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 23:16:08,195 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:08,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:08,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:08,398 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 [2023-03-31 23:16:08,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:08,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:08,399 INFO L85 PathProgramCache]: Analyzing trace with hash 664456897, now seen corresponding path program 1 times [2023-03-31 23:16:08,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:08,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538012065] [2023-03-31 23:16:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:08,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:08,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:08,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303684664] [2023-03-31 23:16:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:08,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:08,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:08,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:08,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:16:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:08,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 23:16:08,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 23:16:08,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:08,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:08,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538012065] [2023-03-31 23:16:08,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:08,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303684664] [2023-03-31 23:16:08,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303684664] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:16:08,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [389396408] [2023-03-31 23:16:08,634 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-03-31 23:16:08,634 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:08,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:08,635 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:08,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:08,663 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:09,082 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 23:16:09,089 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:09,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:09,093 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:09,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2174#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= ~counter~0 2) (= |#NULL.base| 0))' at error location [2023-03-31 23:16:09,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:09,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:16:09,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-03-31 23:16:09,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156686709] [2023-03-31 23:16:09,986 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:09,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:16:09,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:16:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2023-03-31 23:16:09,987 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 23:16:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:10,097 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2023-03-31 23:16:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:16:10,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 42 [2023-03-31 23:16:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:10,098 INFO L225 Difference]: With dead ends: 62 [2023-03-31 23:16:10,098 INFO L226 Difference]: Without dead ends: 60 [2023-03-31 23:16:10,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:16:10,099 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:10,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:16:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-03-31 23:16:10,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-03-31 23:16:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:16:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2023-03-31 23:16:10,125 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 42 [2023-03-31 23:16:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:10,125 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2023-03-31 23:16:10,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 23:16:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2023-03-31 23:16:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 23:16:10,126 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:10,126 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:10,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-31 23:16:10,330 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 [2023-03-31 23:16:10,330 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:10,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:10,331 INFO L85 PathProgramCache]: Analyzing trace with hash 706454379, now seen corresponding path program 1 times [2023-03-31 23:16:10,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:10,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405567172] [2023-03-31 23:16:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:10,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:10,338 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:10,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083210291] [2023-03-31 23:16:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:10,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:10,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:10,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:10,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 23:16:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:10,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 23:16:10,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 23:16:10,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 23:16:10,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:10,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405567172] [2023-03-31 23:16:10,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:10,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083210291] [2023-03-31 23:16:10,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083210291] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:16:10,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [257989722] [2023-03-31 23:16:10,498 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-03-31 23:16:10,498 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:10,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:10,498 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:10,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:10,519 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:11,605 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:16:11,607 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:11,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:11,612 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:12,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2691#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:16:12,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:12,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:12,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-03-31 23:16:12,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685971289] [2023-03-31 23:16:12,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:12,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:16:12,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:16:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2023-03-31 23:16:12,501 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-03-31 23:16:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:12,658 INFO L93 Difference]: Finished difference Result 212 states and 251 transitions. [2023-03-31 23:16:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:16:12,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 51 [2023-03-31 23:16:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:12,661 INFO L225 Difference]: With dead ends: 212 [2023-03-31 23:16:12,661 INFO L226 Difference]: Without dead ends: 204 [2023-03-31 23:16:12,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 23:16:12,662 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 91 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:12,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 157 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:16:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-03-31 23:16:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 196. [2023-03-31 23:16:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 127 states have internal predecessors, (147), 46 states have call successors, (46), 27 states have call predecessors, (46), 26 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-03-31 23:16:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2023-03-31 23:16:12,682 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 51 [2023-03-31 23:16:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:12,682 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2023-03-31 23:16:12,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-03-31 23:16:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2023-03-31 23:16:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 23:16:12,683 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:12,683 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:12,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:12,888 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 [2023-03-31 23:16:12,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:12,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash 423280189, now seen corresponding path program 1 times [2023-03-31 23:16:12,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:12,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554376928] [2023-03-31 23:16:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:12,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:12,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:12,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770590873] [2023-03-31 23:16:12,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:12,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:12,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:12,896 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) [2023-03-31 23:16:12,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 23:16:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:12,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 23:16:12,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 23:16:12,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 23:16:13,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:13,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554376928] [2023-03-31 23:16:13,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:13,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770590873] [2023-03-31 23:16:13,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770590873] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:16:13,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [608096212] [2023-03-31 23:16:13,022 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-03-31 23:16:13,022 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:13,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:13,022 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:13,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:13,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:13,959 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 12 for LOIs [2023-03-31 23:16:13,963 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:13,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:13,966 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:14,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3624#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:16:14,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:14,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:14,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-03-31 23:16:14,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479854407] [2023-03-31 23:16:14,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:16:14,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:14,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:16:14,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:16:14,835 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-31 23:16:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:15,056 INFO L93 Difference]: Finished difference Result 280 states and 365 transitions. [2023-03-31 23:16:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:16:15,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2023-03-31 23:16:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:15,069 INFO L225 Difference]: With dead ends: 280 [2023-03-31 23:16:15,069 INFO L226 Difference]: Without dead ends: 260 [2023-03-31 23:16:15,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:16:15,071 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 68 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:15,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 188 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:16:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-03-31 23:16:15,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2023-03-31 23:16:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 153 states have internal predecessors, (184), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-03-31 23:16:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 300 transitions. [2023-03-31 23:16:15,115 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 300 transitions. Word has length 52 [2023-03-31 23:16:15,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:15,117 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 300 transitions. [2023-03-31 23:16:15,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-03-31 23:16:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 300 transitions. [2023-03-31 23:16:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-03-31 23:16:15,119 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:15,119 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:15,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:15,320 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 [2023-03-31 23:16:15,320 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:15,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:15,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1582057506, now seen corresponding path program 1 times [2023-03-31 23:16:15,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:15,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723890802] [2023-03-31 23:16:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:15,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:15,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:15,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719348824] [2023-03-31 23:16:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:15,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:15,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:15,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:15,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 23:16:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:15,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 23:16:15,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 23:16:15,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-03-31 23:16:15,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:15,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723890802] [2023-03-31 23:16:15,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:15,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719348824] [2023-03-31 23:16:15,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719348824] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:16:15,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138320959] [2023-03-31 23:16:15,484 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-03-31 23:16:15,484 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:15,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:15,484 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:15,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:15,496 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:16,247 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 19 iterations. Over-approximation may be very coarse. [2023-03-31 23:16:16,248 WARN L110 ntervalStateProvider]: Interval conversion did not stabilize in 19 iterations. Over-approximation may be very coarse. [2023-03-31 23:16:16,643 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:16:16,645 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:16,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:16,647 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:17,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4748#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:16:17,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:17,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:17,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-03-31 23:16:17,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119252997] [2023-03-31 23:16:17,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:17,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:16:17,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:16:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:16:17,082 INFO L87 Difference]: Start difference. First operand 236 states and 300 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-03-31 23:16:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:17,207 INFO L93 Difference]: Finished difference Result 345 states and 449 transitions. [2023-03-31 23:16:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:16:17,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 54 [2023-03-31 23:16:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:17,215 INFO L225 Difference]: With dead ends: 345 [2023-03-31 23:16:17,215 INFO L226 Difference]: Without dead ends: 249 [2023-03-31 23:16:17,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:16:17,216 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 64 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:17,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 181 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:16:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-03-31 23:16:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2023-03-31 23:16:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 162 states have internal predecessors, (187), 60 states have call successors, (60), 26 states have call predecessors, (60), 25 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-03-31 23:16:17,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 303 transitions. [2023-03-31 23:16:17,236 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 303 transitions. Word has length 54 [2023-03-31 23:16:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:17,236 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 303 transitions. [2023-03-31 23:16:17,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-03-31 23:16:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 303 transitions. [2023-03-31 23:16:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 23:16:17,237 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:17,237 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:17,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:17,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 23:16:17,441 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:17,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1671131831, now seen corresponding path program 1 times [2023-03-31 23:16:17,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:17,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485584697] [2023-03-31 23:16:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:17,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:17,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997265476] [2023-03-31 23:16:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:17,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:17,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:17,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:17,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 23:16:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:17,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2023-03-31 23:16:17,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-03-31 23:16:17,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 23:16:17,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485584697] [2023-03-31 23:16:17,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997265476] [2023-03-31 23:16:17,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997265476] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:16:17,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998126807] [2023-03-31 23:16:17,707 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 23:16:17,707 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:17,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:17,707 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:17,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:17,718 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:18,597 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 12 for LOIs [2023-03-31 23:16:18,601 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:18,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:18,604 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:19,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5996#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:16:19,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:19,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:19,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-03-31 23:16:19,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202568797] [2023-03-31 23:16:19,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:19,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:16:19,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:19,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:16:19,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 23:16:19,851 INFO L87 Difference]: Start difference. First operand 245 states and 303 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2023-03-31 23:16:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:20,174 INFO L93 Difference]: Finished difference Result 331 states and 430 transitions. [2023-03-31 23:16:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:16:20,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 59 [2023-03-31 23:16:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:20,178 INFO L225 Difference]: With dead ends: 331 [2023-03-31 23:16:20,178 INFO L226 Difference]: Without dead ends: 325 [2023-03-31 23:16:20,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 23:16:20,179 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:20,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 213 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:16:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-03-31 23:16:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 292. [2023-03-31 23:16:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 192 states have (on average 1.1979166666666667) internal successors, (230), 201 states have internal predecessors, (230), 71 states have call successors, (71), 29 states have call predecessors, (71), 28 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2023-03-31 23:16:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 367 transitions. [2023-03-31 23:16:20,203 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 367 transitions. Word has length 59 [2023-03-31 23:16:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:20,203 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 367 transitions. [2023-03-31 23:16:20,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2023-03-31 23:16:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 367 transitions. [2023-03-31 23:16:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-31 23:16:20,204 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:20,204 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:20,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:20,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 23:16:20,408 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:20,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:20,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2081133772, now seen corresponding path program 2 times [2023-03-31 23:16:20,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:20,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46411095] [2023-03-31 23:16:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:20,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:20,415 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:20,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638752517] [2023-03-31 23:16:20,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:16:20,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:20,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:20,416 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:20,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 23:16:20,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 23:16:20,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:16:20,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-31 23:16:20,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-03-31 23:16:20,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:20,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46411095] [2023-03-31 23:16:20,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638752517] [2023-03-31 23:16:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638752517] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:16:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274905654] [2023-03-31 23:16:20,631 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 23:16:20,631 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:20,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:20,631 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:20,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:20,641 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:21,513 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 12 for LOIs [2023-03-31 23:16:21,519 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:21,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:21,522 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:22,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7162#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:16:22,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:22,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:16:22,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-03-31 23:16:22,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179788086] [2023-03-31 23:16:22,503 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:22,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:16:22,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:22,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:16:22,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:16:22,505 INFO L87 Difference]: Start difference. First operand 292 states and 367 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-03-31 23:16:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:22,671 INFO L93 Difference]: Finished difference Result 316 states and 394 transitions. [2023-03-31 23:16:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:16:22,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 64 [2023-03-31 23:16:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:22,673 INFO L225 Difference]: With dead ends: 316 [2023-03-31 23:16:22,673 INFO L226 Difference]: Without dead ends: 314 [2023-03-31 23:16:22,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:16:22,674 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:22,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 192 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:16:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-03-31 23:16:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 311. [2023-03-31 23:16:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 204 states have (on average 1.196078431372549) internal successors, (244), 213 states have internal predecessors, (244), 75 states have call successors, (75), 32 states have call predecessors, (75), 31 states have return successors, (70), 65 states have call predecessors, (70), 70 states have call successors, (70) [2023-03-31 23:16:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 389 transitions. [2023-03-31 23:16:22,700 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 389 transitions. Word has length 64 [2023-03-31 23:16:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:22,701 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 389 transitions. [2023-03-31 23:16:22,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-03-31 23:16:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 389 transitions. [2023-03-31 23:16:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-03-31 23:16:22,701 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:22,701 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:22,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:22,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 23:16:22,906 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:22,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1381207959, now seen corresponding path program 3 times [2023-03-31 23:16:22,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:22,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383652665] [2023-03-31 23:16:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:22,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:22,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:22,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120508173] [2023-03-31 23:16:22,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:16:22,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:22,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:22,915 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:22,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-31 23:16:22,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:16:22,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:16:22,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2023-03-31 23:16:22,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 23:16:23,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:23,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383652665] [2023-03-31 23:16:23,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120508173] [2023-03-31 23:16:23,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120508173] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:16:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530361884] [2023-03-31 23:16:23,282 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 23:16:23,282 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:23,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:23,283 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:23,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:23,300 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:24,165 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 12 for LOIs [2023-03-31 23:16:24,169 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:24,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:24,172 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:25,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8335#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:16:25,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:25,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:16:25,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-03-31 23:16:25,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540000927] [2023-03-31 23:16:25,410 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:25,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 23:16:25,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 23:16:25,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:16:25,411 INFO L87 Difference]: Start difference. First operand 311 states and 389 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-03-31 23:16:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:25,619 INFO L93 Difference]: Finished difference Result 328 states and 405 transitions. [2023-03-31 23:16:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:16:25,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 69 [2023-03-31 23:16:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:25,621 INFO L225 Difference]: With dead ends: 328 [2023-03-31 23:16:25,621 INFO L226 Difference]: Without dead ends: 324 [2023-03-31 23:16:25,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 23:16:25,622 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 23 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:25,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 170 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:16:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-03-31 23:16:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2023-03-31 23:16:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 212 states have (on average 1.1839622641509433) internal successors, (251), 220 states have internal predecessors, (251), 75 states have call successors, (75), 35 states have call predecessors, (75), 33 states have return successors, (70), 65 states have call predecessors, (70), 70 states have call successors, (70) [2023-03-31 23:16:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 396 transitions. [2023-03-31 23:16:25,648 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 396 transitions. Word has length 69 [2023-03-31 23:16:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:25,648 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 396 transitions. [2023-03-31 23:16:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2023-03-31 23:16:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 396 transitions. [2023-03-31 23:16:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-03-31 23:16:25,649 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:25,649 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:25,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:25,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:25,855 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:25,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:25,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1000469429, now seen corresponding path program 1 times [2023-03-31 23:16:25,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:25,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641985350] [2023-03-31 23:16:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:25,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:25,861 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984644469] [2023-03-31 23:16:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:25,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:25,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:25,863 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:25,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-03-31 23:16:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:25,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 43 conjunts are in the unsatisfiable core [2023-03-31 23:16:25,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-03-31 23:16:26,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-03-31 23:16:26,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:26,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641985350] [2023-03-31 23:16:26,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:26,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984644469] [2023-03-31 23:16:26,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984644469] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:16:26,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343334572] [2023-03-31 23:16:26,863 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-03-31 23:16:26,863 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:26,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:26,863 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:26,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:26,878 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:28,411 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:16:28,412 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:28,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:28,415 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:30,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9771#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:16:30,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:30,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:30,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-03-31 23:16:30,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165914428] [2023-03-31 23:16:30,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:30,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 23:16:30,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 23:16:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2023-03-31 23:16:30,316 INFO L87 Difference]: Start difference. First operand 321 states and 396 transitions. Second operand has 20 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2023-03-31 23:16:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:16:40,319 INFO L93 Difference]: Finished difference Result 455 states and 602 transitions. [2023-03-31 23:16:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-03-31 23:16:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 75 [2023-03-31 23:16:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:16:40,322 INFO L225 Difference]: With dead ends: 455 [2023-03-31 23:16:40,322 INFO L226 Difference]: Without dead ends: 444 [2023-03-31 23:16:40,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=487, Invalid=3419, Unknown=0, NotChecked=0, Total=3906 [2023-03-31 23:16:40,323 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 145 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:16:40,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 451 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 23:16:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-03-31 23:16:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 411. [2023-03-31 23:16:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 270 states have (on average 1.2333333333333334) internal successors, (333), 279 states have internal predecessors, (333), 105 states have call successors, (105), 36 states have call predecessors, (105), 35 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) [2023-03-31 23:16:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 540 transitions. [2023-03-31 23:16:40,381 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 540 transitions. Word has length 75 [2023-03-31 23:16:40,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:16:40,381 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 540 transitions. [2023-03-31 23:16:40,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2023-03-31 23:16:40,381 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 540 transitions. [2023-03-31 23:16:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 23:16:40,382 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:16:40,382 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:16:40,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-03-31 23:16:40,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-03-31 23:16:40,585 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:16:40,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:16:40,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1023477473, now seen corresponding path program 1 times [2023-03-31 23:16:40,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:16:40,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241327850] [2023-03-31 23:16:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:40,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:16:40,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:16:40,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887986322] [2023-03-31 23:16:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:16:40,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:16:40,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:16:40,593 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:16:40,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-03-31 23:16:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:16:40,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 52 conjunts are in the unsatisfiable core [2023-03-31 23:16:40,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:16:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-03-31 23:16:41,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:16:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-03-31 23:16:43,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:16:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241327850] [2023-03-31 23:16:43,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:16:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887986322] [2023-03-31 23:16:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887986322] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:16:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241821448] [2023-03-31 23:16:43,229 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 23:16:43,229 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:16:43,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:16:43,229 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:16:43,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:16:43,243 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:16:44,866 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:16:44,868 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:16:44,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:16:44,871 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:16:54,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11683#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:16:54,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:16:54,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:16:54,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-03-31 23:16:54,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988683939] [2023-03-31 23:16:54,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:16:54,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-31 23:16:54,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:16:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-31 23:16:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1304, Unknown=1, NotChecked=0, Total=1482 [2023-03-31 23:16:54,484 INFO L87 Difference]: Start difference. First operand 411 states and 540 transitions. Second operand has 21 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2023-03-31 23:17:02,570 WARN L223 SmtUtils]: Spent 6.51s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:17:10,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []