/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 EqDomain -i ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:16:32,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:16:32,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:16:32,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:16:32,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:16:32,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:16:32,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:16:32,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:16:32,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:16:32,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:16:32,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:16:32,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:16:32,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:16:32,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:16:32,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:16:32,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:16:32,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:16:32,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:16:32,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:16:32,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:16:32,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:16:32,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:16:32,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:16:32,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:16:32,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 11:16:32,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:16:32,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:16:32,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:16:32,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:16:32,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:16:32,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:16:32,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:16:32,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:16:32,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:16:32,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:16:32,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:16:32,224 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 11:16:32,246 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:16:32,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:16:32,246 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:16:32,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:16:32,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:16:32,247 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:16:32,247 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:16:32,247 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:16:32,247 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:16:32,247 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:16:32,247 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:16:32,248 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:16:32,248 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:16:32,248 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:16:32,248 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:16:32,248 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:16:32,248 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:16:32,248 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:16:32,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:16:32,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:16:32,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:16:32,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:16:32,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:16:32,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:16:32,250 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:16:32,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:16:32,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:16:32,250 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:16:32,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:16:32,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:16:32,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:16:32,251 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:16:32,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:16:32,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:16:32,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:16:32,455 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:16:32,456 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:16:32,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2023-04-01 11:16:33,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:16:33,767 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:16:33,767 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2023-04-01 11:16:33,775 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22b3dbc65/36b02bb593ac49498bae42357f47bc40/FLAG7dd4d31b6 [2023-04-01 11:16:33,791 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22b3dbc65/36b02bb593ac49498bae42357f47bc40 [2023-04-01 11:16:33,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:16:33,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:16:33,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:16:33,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:16:33,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:16:33,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:33,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4196dfb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33, skipping insertion in model container [2023-04-01 11:16:33,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:33,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:16:33,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:16:33,925 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/dijkstra-u_unwindbound5.c[525,538] [2023-04-01 11:16:33,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:16:33,951 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:16:33,960 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/dijkstra-u_unwindbound5.c[525,538] [2023-04-01 11:16:33,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:16:33,984 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:16:33,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33 WrapperNode [2023-04-01 11:16:33,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:16:33,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:16:33,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:16:33,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:16:33,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:33,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:33,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:33,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:34,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:34,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:34,006 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:34,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:34,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:16:34,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:16:34,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:16:34,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:16:34,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (1/1) ... [2023-04-01 11:16:34,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:16:34,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:34,066 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 11:16:34,086 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 11:16:34,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:16:34,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:16:34,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:16:34,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:16:34,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:16:34,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:16:34,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:16:34,135 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:16:34,135 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:16:34,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:16:34,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:16:34,136 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:16:34,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:16:34,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:16:34,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:16:34,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:16:34,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:16:34,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:16:34,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:16:34,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:16:34,194 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:16:34,197 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:16:34,426 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:16:34,479 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:16:34,479 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:16:34,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:16:34 BoogieIcfgContainer [2023-04-01 11:16:34,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:16:34,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:16:34,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:16:34,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:16:34,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:16:33" (1/3) ... [2023-04-01 11:16:34,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e2aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:16:34, skipping insertion in model container [2023-04-01 11:16:34,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:16:33" (2/3) ... [2023-04-01 11:16:34,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e2aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:16:34, skipping insertion in model container [2023-04-01 11:16:34,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:16:34" (3/3) ... [2023-04-01 11:16:34,496 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound5.c [2023-04-01 11:16:34,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:16:34,508 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:16:34,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:16:34,550 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;@2053f08f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:16:34,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:16:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) [2023-04-01 11:16:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:16:34,573 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:34,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:34,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:34,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:34,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1529025729, now seen corresponding path program 1 times [2023-04-01 11:16:34,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:34,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611026504] [2023-04-01 11:16:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:34,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:34,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:34,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611026504] [2023-04-01 11:16:34,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 11:16:34,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58676705] [2023-04-01 11:16:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:34,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:34,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:34,708 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 11:16:34,754 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 11:16:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:34,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:16:34,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:34,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:16:34,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58676705] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:34,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:34,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:16:34,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440305081] [2023-04-01 11:16:34,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:34,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:16:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:16:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:16:34,866 INFO L87 Difference]: Start difference. First operand has 34 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:34,904 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2023-04-01 11:16:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:16:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-01 11:16:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:34,912 INFO L225 Difference]: With dead ends: 56 [2023-04-01 11:16:34,912 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 11:16:34,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 11:16:34,916 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:34,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:16:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 11:16:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 11:16:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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) [2023-04-01 11:16:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-04-01 11:16:34,945 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 15 [2023-04-01 11:16:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:34,945 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-04-01 11:16:34,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-04-01 11:16:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 11:16:34,946 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:34,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:34,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:16:35,151 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 11:16:35,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:35,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:35,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1095400856, now seen corresponding path program 1 times [2023-04-01 11:16:35,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:35,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689829951] [2023-04-01 11:16:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:35,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:35,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:35,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194280643] [2023-04-01 11:16:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:35,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:35,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:35,183 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 11:16:35,184 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 11:16:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:35,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:16:35,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:35,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:16:35,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689829951] [2023-04-01 11:16:35,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:16:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194280643] [2023-04-01 11:16:35,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194280643] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:35,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:35,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:16:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881622363] [2023-04-01 11:16:35,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:35,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:16:35,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:35,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:16:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:16:35,305 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:35,341 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2023-04-01 11:16:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:16:35,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 11:16:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:35,343 INFO L225 Difference]: With dead ends: 50 [2023-04-01 11:16:35,343 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 11:16:35,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 11:16:35,344 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:35,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:16:35,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 11:16:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 11:16:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 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) [2023-04-01 11:16:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-04-01 11:16:35,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 17 [2023-04-01 11:16:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:35,355 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-04-01 11:16:35,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-04-01 11:16:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 11:16:35,356 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:35,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:35,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:35,576 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 11:16:35,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:35,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash 56656903, now seen corresponding path program 1 times [2023-04-01 11:16:35,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:35,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043638381] [2023-04-01 11:16:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:35,604 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:35,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798635717] [2023-04-01 11:16:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:35,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:35,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:35,619 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 11:16:35,620 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 11:16:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:35,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:16:35,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:35,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:16:35,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:35,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043638381] [2023-04-01 11:16:35,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:16:35,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798635717] [2023-04-01 11:16:35,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798635717] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:35,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:35,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:16:35,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654855106] [2023-04-01 11:16:35,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:35,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:16:35,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:35,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:16:35,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:16:35,708 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:35,753 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2023-04-01 11:16:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:16:35,754 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-04-01 11:16:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:35,755 INFO L225 Difference]: With dead ends: 45 [2023-04-01 11:16:35,755 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 11:16:35,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:16:35,756 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:35,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:16:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 11:16:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-04-01 11:16:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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) [2023-04-01 11:16:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2023-04-01 11:16:35,767 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 18 [2023-04-01 11:16:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:35,768 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-04-01 11:16:35,768 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2023-04-01 11:16:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 11:16:35,768 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:35,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:35,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:35,969 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 11:16:35,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:35,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:35,971 INFO L85 PathProgramCache]: Analyzing trace with hash 58146453, now seen corresponding path program 1 times [2023-04-01 11:16:35,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:35,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749366234] [2023-04-01 11:16:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:35,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:36,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:36,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749366234] [2023-04-01 11:16:36,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749366234] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:36,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:16:36,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:16:36,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106449414] [2023-04-01 11:16:36,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:36,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:16:36,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:36,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:16:36,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:16:36,246 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:38,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:40,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:41,293 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2023-04-01 11:16:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:16:41,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-01 11:16:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:41,294 INFO L225 Difference]: With dead ends: 67 [2023-04-01 11:16:41,294 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 11:16:41,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:16:41,295 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:41,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 3 Unknown, 0 Unchecked, 5.0s Time] [2023-04-01 11:16:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 11:16:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 11:16:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2023-04-01 11:16:41,305 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 18 [2023-04-01 11:16:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:41,306 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2023-04-01 11:16:41,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2023-04-01 11:16:41,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:16:41,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:41,306 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:41,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 11:16:41,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:41,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash 45867820, now seen corresponding path program 1 times [2023-04-01 11:16:41,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:41,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934165688] [2023-04-01 11:16:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:41,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:41,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:41,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907086528] [2023-04-01 11:16:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:41,316 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 11:16:41,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:16:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:41,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:16:41,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:41,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:41,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:41,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934165688] [2023-04-01 11:16:41,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:16:41,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907086528] [2023-04-01 11:16:41,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907086528] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:41,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243803781] [2023-04-01 11:16:41,489 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:16:41,489 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:41,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:41,495 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:41,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:41,608 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:16:42,073 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 55 for LOIs [2023-04-01 11:16:42,084 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2023-04-01 11:16:42,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:16:42,098 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:16:43,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1243803781] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:43,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:16:43,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 21 [2023-04-01 11:16:43,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574028710] [2023-04-01 11:16:43,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:43,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 11:16:43,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 11:16:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-04-01 11:16:43,082 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:46,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-04-01 11:16:46,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:46,999 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2023-04-01 11:16:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:16:47,000 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-04-01 11:16:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:47,001 INFO L225 Difference]: With dead ends: 68 [2023-04-01 11:16:47,001 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 11:16:47,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:16:47,002 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:47,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 58 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 412 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 11:16:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 11:16:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2023-04-01 11:16:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2023-04-01 11:16:47,032 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 20 [2023-04-01 11:16:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:47,032 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2023-04-01 11:16:47,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2023-04-01 11:16:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:16:47,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:47,033 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:47,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:47,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:47,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:47,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:47,239 INFO L85 PathProgramCache]: Analyzing trace with hash 47357370, now seen corresponding path program 1 times [2023-04-01 11:16:47,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:47,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733946532] [2023-04-01 11:16:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:47,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:47,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733946532] [2023-04-01 11:16:47,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733946532] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:16:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386913410] [2023-04-01 11:16:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:47,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:47,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:47,346 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:47,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:16:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:47,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:16:47,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:47,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:47,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386913410] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:47,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952443545] [2023-04-01 11:16:47,473 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:16:47,473 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:47,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:47,474 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:47,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:47,531 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:16:47,781 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 64 for LOIs [2023-04-01 11:16:47,800 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2023-04-01 11:16:47,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:16:47,810 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:16:48,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1238#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (< ~counter~0 6) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:16:48,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:16:48,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:16:48,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-04-01 11:16:48,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551834080] [2023-04-01 11:16:48,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:16:48,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:16:48,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:16:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-04-01 11:16:48,763 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 11:16:51,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:53,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 11:16:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:54,292 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2023-04-01 11:16:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:16:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 20 [2023-04-01 11:16:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:54,293 INFO L225 Difference]: With dead ends: 103 [2023-04-01 11:16:54,293 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 11:16:54,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:16:54,295 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:54,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 175 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2023-04-01 11:16:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 11:16:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2023-04-01 11:16:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-04-01 11:16:54,307 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 20 [2023-04-01 11:16:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:54,308 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-04-01 11:16:54,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 11:16:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-04-01 11:16:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:16:54,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:54,308 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:54,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 11:16:54,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:54,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:54,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:54,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1077737041, now seen corresponding path program 1 times [2023-04-01 11:16:54,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:54,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766843406] [2023-04-01 11:16:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:54,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:54,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:54,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766843406] [2023-04-01 11:16:54,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766843406] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:16:54,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582568801] [2023-04-01 11:16:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:54,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:54,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:54,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:54,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:16:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:54,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 11:16:54,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:54,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:54,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582568801] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:54,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973781622] [2023-04-01 11:16:54,972 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:16:54,972 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:54,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:54,973 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:54,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:55,024 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:16:55,288 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 59 for LOIs [2023-04-01 11:16:55,299 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2023-04-01 11:16:55,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:16:55,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:16:56,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1973781622] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:56,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:16:56,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 7, 7] total 28 [2023-04-01 11:16:56,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817488726] [2023-04-01 11:16:56,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:56,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:16:56,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:16:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:16:56,451 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:58,632 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2023-04-01 11:16:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 11:16:58,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 11:16:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:58,633 INFO L225 Difference]: With dead ends: 89 [2023-04-01 11:16:58,634 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 11:16:58,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 11:16:58,635 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:58,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 11:16:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 11:16:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2023-04-01 11:16:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2023-04-01 11:16:58,645 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 21 [2023-04-01 11:16:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:58,645 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2023-04-01 11:16:58,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:16:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2023-04-01 11:16:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 11:16:58,646 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:58,646 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:16:58,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:58,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:58,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:58,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash 409817078, now seen corresponding path program 2 times [2023-04-01 11:16:58,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:58,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139507813] [2023-04-01 11:16:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:58,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:16:58,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:58,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139507813] [2023-04-01 11:16:58,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139507813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:16:58,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874812941] [2023-04-01 11:16:58,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:16:58,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:58,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:58,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:58,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:16:59,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-04-01 11:16:59,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:16:59,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 11:16:59,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:16:59,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:16:59,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874812941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:16:59,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:16:59,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-01 11:16:59,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697903890] [2023-04-01 11:16:59,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:16:59,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:16:59,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:16:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:16:59,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:16:59,053 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:16:59,082 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2023-04-01 11:16:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:16:59,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-04-01 11:16:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:16:59,085 INFO L225 Difference]: With dead ends: 74 [2023-04-01 11:16:59,085 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 11:16:59,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:16:59,086 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:16:59,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:16:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 11:16:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2023-04-01 11:16:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:16:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2023-04-01 11:16:59,096 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 29 [2023-04-01 11:16:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:16:59,096 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2023-04-01 11:16:59,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:16:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2023-04-01 11:16:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 11:16:59,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:16:59,099 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2023-04-01 11:16:59,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:16:59,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:59,304 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:16:59,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:16:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2008937068, now seen corresponding path program 1 times [2023-04-01 11:16:59,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:16:59,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14276207] [2023-04-01 11:16:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:59,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:16:59,314 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:16:59,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940539591] [2023-04-01 11:16:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:16:59,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:16:59,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:16:59,315 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:16:59,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:16:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:16:59,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 11:16:59,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:16:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:16:59,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:16:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-01 11:16:59,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:16:59,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14276207] [2023-04-01 11:16:59,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:16:59,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940539591] [2023-04-01 11:16:59,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940539591] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:16:59,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035630732] [2023-04-01 11:16:59,521 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 11:16:59,521 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:16:59,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:16:59,522 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:16:59,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:16:59,545 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:17:05,484 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:17:05,486 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2023-04-01 11:17:05,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:17:05,496 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:17:21,297 WARN L223 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 81 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)