/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:24:03,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:24:03,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:24:03,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:24:03,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:24:03,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:24:03,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:24:03,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:24:03,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:24:03,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:24:03,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:24:03,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:24:03,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:24:03,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:24:03,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:24:03,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:24:03,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:24:03,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:24:03,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:24:03,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:24:03,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:24:03,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:24:03,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:24:03,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:24:03,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:24:03,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:24:03,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:24:03,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:24:03,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:24:03,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:24:03,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:24:03,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:24:03,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:24:03,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:24:03,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:24:03,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:24:03,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:24:03,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:24:03,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:24:03,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:24:03,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:24:03,326 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:24:03,341 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:24:03,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:24:03,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:24:03,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:24:03,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:24:03,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:24:03,343 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:24:03,343 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:24:03,343 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:24:03,343 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:24:03,343 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:24:03,343 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:24:03,344 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:24:03,344 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:24:03,344 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:24:03,344 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:24:03,344 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:24:03,344 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:24:03,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:24:03,345 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:24:03,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:24:03,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:24:03,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:24:03,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:24:03,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:24:03,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:24:03,346 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:24:03,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:24:03,346 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:24:03,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:24:03,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:24:03,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:24:03,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:24:03,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:24:03,347 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:24:03,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:24:03,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:24:03,347 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:24:03,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:24:03,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:24:03,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:24:03,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:24:03,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:24:03,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:24:03,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:24:03,539 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:24:03,539 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:24:03,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound20.c [2023-04-01 05:24:04,768 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:24:04,932 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:24:04,933 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound20.c [2023-04-01 05:24:04,937 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fcbf2402/3ff50555e20547ebb8a7ae80ab22cdc3/FLAGe0560838c [2023-04-01 05:24:04,951 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fcbf2402/3ff50555e20547ebb8a7ae80ab22cdc3 [2023-04-01 05:24:04,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:24:04,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:24:04,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:24:04,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:24:04,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:24:04,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:24:04" (1/1) ... [2023-04-01 05:24:04,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19516353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:04, skipping insertion in model container [2023-04-01 05:24:04,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:24:04" (1/1) ... [2023-04-01 05:24:04,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:24:04,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:24:05,069 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/lcm1_unwindbound20.c[552,565] [2023-04-01 05:24:05,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:24:05,088 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:24:05,096 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/lcm1_unwindbound20.c[552,565] [2023-04-01 05:24:05,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:24:05,111 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:24:05,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05 WrapperNode [2023-04-01 05:24:05,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:24:05,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:24:05,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:24:05,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:24:05,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (1/1) ... [2023-04-01 05:24:05,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (1/1) ... [2023-04-01 05:24:05,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (1/1) ... [2023-04-01 05:24:05,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (1/1) ... [2023-04-01 05:24:05,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (1/1) ... [2023-04-01 05:24:05,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (1/1) ... [2023-04-01 05:24:05,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (1/1) ... [2023-04-01 05:24:05,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (1/1) ... [2023-04-01 05:24:05,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:24:05,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:24:05,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:24:05,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:24:05,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (1/1) ... [2023-04-01 05:24:05,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:24:05,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:24:05,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:24:05,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:24:05,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:24:05,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:24:05,220 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:24:05,220 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:24:05,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:24:05,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:24:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:24:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:24:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:24:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:24:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 05:24:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:24:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:24:05,221 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:24:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:24:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:24:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:24:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:24:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:24:05,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:24:05,286 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:24:05,288 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:24:05,426 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:24:05,447 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:24:05,447 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 05:24:05,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:24:05 BoogieIcfgContainer [2023-04-01 05:24:05,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:24:05,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:24:05,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:24:05,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:24:05,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:24:04" (1/3) ... [2023-04-01 05:24:05,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554c4ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:24:05, skipping insertion in model container [2023-04-01 05:24:05,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:24:05" (2/3) ... [2023-04-01 05:24:05,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554c4ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:24:05, skipping insertion in model container [2023-04-01 05:24:05,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:24:05" (3/3) ... [2023-04-01 05:24:05,454 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound20.c [2023-04-01 05:24:05,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:24:05,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:24:05,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:24:05,506 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;@61c7f41c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:24:05,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:24:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 05:24:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 05:24:05,526 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:24:05,526 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] [2023-04-01 05:24:05,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:24:05,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:24:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2086075926, now seen corresponding path program 1 times [2023-04-01 05:24:05,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:24:05,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205165499] [2023-04-01 05:24:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:24:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:24:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:24:05,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:24:05,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205165499] [2023-04-01 05:24:05,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 05:24:05,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750918991] [2023-04-01 05:24:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:24:05,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:24:05,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:24:05,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:24:05,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:24:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:24:05,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 05:24:05,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:24:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:24:05,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:24:05,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750918991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:24:05,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:24:05,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:24:05,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148486901] [2023-04-01 05:24:05,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:24:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:24:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:24:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:24:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:24:05,863 INFO L87 Difference]: Start difference. First operand has 36 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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) [2023-04-01 05:24:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:24:05,894 INFO L93 Difference]: Finished difference Result 60 states and 94 transitions. [2023-04-01 05:24:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:24:05,896 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 [2023-04-01 05:24:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:24:05,901 INFO L225 Difference]: With dead ends: 60 [2023-04-01 05:24:05,901 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 05:24:05,903 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 [2023-04-01 05:24:05,906 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2023-04-01 05:24:05,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:24:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 05:24:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 05:24:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:24:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2023-04-01 05:24:05,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 23 [2023-04-01 05:24:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:24:05,940 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2023-04-01 05:24:05,940 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) [2023-04-01 05:24:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2023-04-01 05:24:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 05:24:05,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:24:05,941 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] [2023-04-01 05:24:05,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:24:06,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 05:24:06,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:24:06,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:24:06,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1751212143, now seen corresponding path program 1 times [2023-04-01 05:24:06,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:24:06,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176433738] [2023-04-01 05:24:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:24:06,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:24:06,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:24:06,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096447384] [2023-04-01 05:24:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:24:06,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:24:06,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:24:06,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:24:06,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:24:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:24:06,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:24:06,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:24:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:24:06,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:24:06,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:24:06,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176433738] [2023-04-01 05:24:06,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:24:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096447384] [2023-04-01 05:24:06,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096447384] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:24:06,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:24:06,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 05:24:06,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619023733] [2023-04-01 05:24:06,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:24:06,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 05:24:06,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:24:06,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 05:24:06,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 05:24:06,370 INFO L87 Difference]: Start difference. First operand 32 states and 44 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) [2023-04-01 05:24:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:24:06,398 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2023-04-01 05:24:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:24:06,398 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 [2023-04-01 05:24:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:24:06,399 INFO L225 Difference]: With dead ends: 42 [2023-04-01 05:24:06,399 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 05:24:06,400 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 [2023-04-01 05:24:06,401 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:24:06,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:24:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 05:24:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 05:24:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:24:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2023-04-01 05:24:06,406 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 24 [2023-04-01 05:24:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:24:06,407 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2023-04-01 05:24:06,407 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) [2023-04-01 05:24:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2023-04-01 05:24:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 05:24:06,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:24:06,407 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] [2023-04-01 05:24:06,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 05:24:06,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 05:24:06,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:24:06,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:24:06,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1749543847, now seen corresponding path program 1 times [2023-04-01 05:24:06,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:24:06,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420599539] [2023-04-01 05:24:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:24:06,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:24:06,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:24:06,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725986392] [2023-04-01 05:24:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:24:06,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:24:06,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:24:06,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:24:06,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:24:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:24:06,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 05:24:06,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:24:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:24:06,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:24:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:24:07,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:24:07,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420599539] [2023-04-01 05:24:07,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:24:07,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725986392] [2023-04-01 05:24:07,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725986392] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 05:24:07,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:24:07,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 05:24:07,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542488365] [2023-04-01 05:24:07,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:24:07,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:24:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:24:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:24:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-04-01 05:24:07,063 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (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) [2023-04-01 05:24:09,659 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 [1] [2023-04-01 05:24:11,672 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 [1] [2023-04-01 05:24:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:24:11,696 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-04-01 05:24:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:24:11,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (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 24 [2023-04-01 05:24:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:24:11,698 INFO L225 Difference]: With dead ends: 54 [2023-04-01 05:24:11,698 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 05:24:11,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 05:24:11,699 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:24:11,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-04-01 05:24:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 05:24:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-04-01 05:24:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 05:24:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2023-04-01 05:24:11,712 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 24 [2023-04-01 05:24:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:24:11,712 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2023-04-01 05:24:11,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (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) [2023-04-01 05:24:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2023-04-01 05:24:11,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 05:24:11,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:24:11,715 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] [2023-04-01 05:24:11,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 05:24:11,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:24:11,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:24:11,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:24:11,922 INFO L85 PathProgramCache]: Analyzing trace with hash 208420986, now seen corresponding path program 1 times [2023-04-01 05:24:11,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:24:11,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703725507] [2023-04-01 05:24:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:24:11,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:24:11,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:24:11,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088988167] [2023-04-01 05:24:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:24:11,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:24:11,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:24:11,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:24:11,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process