/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/egcd2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:20:33,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:20:33,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:20:33,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:20:33,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:20:33,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:20:33,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:20:33,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:20:33,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:20:33,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:20:33,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:20:33,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:20:33,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:20:33,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:20:33,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:20:33,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:20:33,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:20:33,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:20:33,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:20:33,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:20:33,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:20:33,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:20:33,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:20:33,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:20:33,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:20:33,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:20:33,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:20:33,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:20:33,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:20:33,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:20:33,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:20:33,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:20:33,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:20:33,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:20:33,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:20:33,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:20:33,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:20:33,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:20:33,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:20:33,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:20:33,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:20:33,119 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 11:20:33,149 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:20:33,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:20:33,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:20:33,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:20:33,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:20:33,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:20:33,151 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:20:33,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:20:33,152 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:20:33,152 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:20:33,152 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:20:33,153 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:20:33,153 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:20:33,153 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:20:33,153 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:20:33,153 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:20:33,153 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:20:33,153 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:20:33,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:20:33,154 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:20:33,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:20:33,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:20:33,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:20:33,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:20:33,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:20:33,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:20:33,155 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:20:33,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:20:33,155 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:20:33,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:20:33,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:20:33,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:20:33,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:20:33,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:20:33,156 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:20:33,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:20:33,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:20:33,156 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:20:33,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:20:33,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:20:33,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:20:33,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:20:33,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:20:33,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:20:33,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:20:33,424 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:20:33,425 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:20:33,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2023-04-01 11:20:34,642 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:20:34,796 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:20:34,797 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2023-04-01 11:20:34,806 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07413b8c1/2a833a399ad149c5b82bc17373d6c1eb/FLAGa80a451c6 [2023-04-01 11:20:34,821 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07413b8c1/2a833a399ad149c5b82bc17373d6c1eb [2023-04-01 11:20:34,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:20:34,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:20:34,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:20:34,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:20:34,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:20:34,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:20:34" (1/1) ... [2023-04-01 11:20:34,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2fd600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:34, skipping insertion in model container [2023-04-01 11:20:34,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:20:34" (1/1) ... [2023-04-01 11:20:34,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:20:34,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:20:34,964 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2023-04-01 11:20:34,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:20:34,990 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:20:34,998 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2023-04-01 11:20:35,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:20:35,019 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:20:35,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35 WrapperNode [2023-04-01 11:20:35,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:20:35,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:20:35,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:20:35,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:20:35,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (1/1) ... [2023-04-01 11:20:35,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (1/1) ... [2023-04-01 11:20:35,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (1/1) ... [2023-04-01 11:20:35,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (1/1) ... [2023-04-01 11:20:35,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (1/1) ... [2023-04-01 11:20:35,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (1/1) ... [2023-04-01 11:20:35,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (1/1) ... [2023-04-01 11:20:35,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (1/1) ... [2023-04-01 11:20:35,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:20:35,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:20:35,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:20:35,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:20:35,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (1/1) ... [2023-04-01 11:20:35,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:20:35,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:35,076 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 11:20:35,091 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 11:20:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:20:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:20:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:20:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:20:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:20:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:20:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:20:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:20:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:20:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:20:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:20:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:20:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:20:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:20:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:20:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:20:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:20:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:20:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:20:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:20:35,187 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:20:35,188 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:20:35,327 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:20:35,349 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:20:35,350 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:20:35,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:20:35 BoogieIcfgContainer [2023-04-01 11:20:35,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:20:35,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:20:35,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:20:35,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:20:35,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:20:34" (1/3) ... [2023-04-01 11:20:35,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a80151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:20:35, skipping insertion in model container [2023-04-01 11:20:35,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:20:35" (2/3) ... [2023-04-01 11:20:35,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a80151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:20:35, skipping insertion in model container [2023-04-01 11:20:35,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:20:35" (3/3) ... [2023-04-01 11:20:35,360 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2023-04-01 11:20:35,373 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:20:35,373 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:20:35,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:20:35,417 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;@1baf5137, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:20:35,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:20:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 19 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:20:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 11:20:35,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:35,428 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:35,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:35,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash -31319789, now seen corresponding path program 1 times [2023-04-01 11:20:35,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:35,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220574342] [2023-04-01 11:20:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:35,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:35,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081608702] [2023-04-01 11:20:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:35,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:35,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:35,533 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 11:20:35,538 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 11:20:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:35,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:20:35,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:20:35,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:20:35,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:35,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220574342] [2023-04-01 11:20:35,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:35,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081608702] [2023-04-01 11:20:35,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081608702] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:20:35,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:20:35,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:20:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446928729] [2023-04-01 11:20:35,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:20:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:20:35,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:20:35,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:20:35,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:20:35,766 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 19 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:20:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:20:35,793 INFO L93 Difference]: Finished difference Result 58 states and 89 transitions. [2023-04-01 11:20:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:20:35,796 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 23 [2023-04-01 11:20:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:20:35,802 INFO L225 Difference]: With dead ends: 58 [2023-04-01 11:20:35,802 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 11:20:35,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:20:35,811 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:20:35,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:20:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 11:20:35,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 11:20:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:20:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-04-01 11:20:35,858 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 23 [2023-04-01 11:20:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:20:35,865 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-04-01 11:20:35,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:20:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-04-01 11:20:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 11:20:35,867 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:35,868 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:35,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:20:36,074 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 11:20:36,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:36,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2036778731, now seen corresponding path program 1 times [2023-04-01 11:20:36,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:36,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771931440] [2023-04-01 11:20:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:36,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:36,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943979888] [2023-04-01 11:20:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:36,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:36,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:36,097 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 11:20:36,105 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 11:20:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:36,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:20:36,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:20:36,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:20:36,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771931440] [2023-04-01 11:20:36,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:36,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943979888] [2023-04-01 11:20:36,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943979888] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:20:36,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:20:36,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:20:36,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065465816] [2023-04-01 11:20:36,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:20:36,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:20:36,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:20:36,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:20:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:20:36,315 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:20:36,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:20:36,348 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2023-04-01 11:20:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:20:36,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2023-04-01 11:20:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:20:36,350 INFO L225 Difference]: With dead ends: 41 [2023-04-01 11:20:36,350 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 11:20:36,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:20:36,351 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:20:36,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:20:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 11:20:36,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 11:20:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:20:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-04-01 11:20:36,358 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 24 [2023-04-01 11:20:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:20:36,359 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-04-01 11:20:36,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:20:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-04-01 11:20:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 11:20:36,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:36,366 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:36,373 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 11:20:36,569 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 11:20:36,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:36,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:36,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1282399699, now seen corresponding path program 1 times [2023-04-01 11:20:36,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:36,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100851594] [2023-04-01 11:20:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:36,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:36,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:36,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775396925] [2023-04-01 11:20:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:36,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:36,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:36,594 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 11:20:36,595 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 11:20:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:36,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:20:36,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:20:36,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:20:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:20:36,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:36,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100851594] [2023-04-01 11:20:36,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:36,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775396925] [2023-04-01 11:20:36,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775396925] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:20:36,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026274326] [2023-04-01 11:20:36,872 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 11:20:36,872 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:20:36,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:20:36,881 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:20:36,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:20:37,046 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:20:38,267 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 11:20:38,278 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 45 for LOIs [2023-04-01 11:20:38,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:20:38,290 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:20:39,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2026274326] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:20:39,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:20:39,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [5, 5] total 18 [2023-04-01 11:20:39,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161956634] [2023-04-01 11:20:39,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:20:39,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 11:20:39,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:20:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 11:20:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-04-01 11:20:39,605 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 11:20:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:20:41,180 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 11:20:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 11:20:41,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 25 [2023-04-01 11:20:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:20:41,182 INFO L225 Difference]: With dead ends: 42 [2023-04-01 11:20:41,182 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 11:20:41,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:20:41,184 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:20:41,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:20:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 11:20:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 11:20:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:20:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2023-04-01 11:20:41,199 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 25 [2023-04-01 11:20:41,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:20:41,200 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2023-04-01 11:20:41,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 11:20:41,200 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2023-04-01 11:20:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 11:20:41,201 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:41,202 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:41,210 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 11:20:41,407 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 11:20:41,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:41,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash -178524094, now seen corresponding path program 1 times [2023-04-01 11:20:41,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:41,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570908392] [2023-04-01 11:20:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:41,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:41,420 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:41,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227143576] [2023-04-01 11:20:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:41,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:41,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:41,425 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 11:20:41,441 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 11:20:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:41,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 11:20:41,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:20:41,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:20:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:20:41,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570908392] [2023-04-01 11:20:41,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227143576] [2023-04-01 11:20:41,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227143576] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:20:41,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:20:41,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 11:20:41,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448013596] [2023-04-01 11:20:41,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:20:41,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:20:41,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:20:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:20:41,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-01 11:20:41,600 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:20:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:20:41,654 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 11:20:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:20:41,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 27 [2023-04-01 11:20:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:20:41,658 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:20:41,659 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 11:20:41,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:20:41,665 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:20:41,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 110 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:20:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 11:20:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-01 11:20:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:20:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-04-01 11:20:41,682 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2023-04-01 11:20:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:20:41,682 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-04-01 11:20:41,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 11:20:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-04-01 11:20:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 11:20:41,683 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:41,683 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:41,688 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 11:20:41,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:41,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:41,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:41,884 INFO L85 PathProgramCache]: Analyzing trace with hash -126473874, now seen corresponding path program 1 times [2023-04-01 11:20:41,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:41,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141012419] [2023-04-01 11:20:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:41,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:41,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:41,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540146465] [2023-04-01 11:20:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:41,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:41,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:41,902 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 11:20:41,905 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 11:20:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:41,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:20:41,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:20:41,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:20:41,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:41,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141012419] [2023-04-01 11:20:41,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:41,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540146465] [2023-04-01 11:20:41,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540146465] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:20:41,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:20:41,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:20:41,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542999773] [2023-04-01 11:20:41,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:20:41,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:20:41,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:20:41,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:20:41,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:20:41,983 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:20:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:20:42,003 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2023-04-01 11:20:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:20:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2023-04-01 11:20:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:20:42,004 INFO L225 Difference]: With dead ends: 63 [2023-04-01 11:20:42,004 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 11:20:42,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:20:42,005 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:20:42,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:20:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 11:20:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 11:20:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:20:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-04-01 11:20:42,015 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 30 [2023-04-01 11:20:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:20:42,016 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-04-01 11:20:42,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:20:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-04-01 11:20:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 11:20:42,019 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:42,019 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:42,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:20:42,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:42,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:42,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1025883745, now seen corresponding path program 1 times [2023-04-01 11:20:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:42,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525340725] [2023-04-01 11:20:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:42,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:42,235 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:42,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322260231] [2023-04-01 11:20:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:42,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:42,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:42,236 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 11:20:42,239 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 11:20:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:42,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 11:20:42,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:20:42,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:20:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:20:42,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525340725] [2023-04-01 11:20:42,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:42,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322260231] [2023-04-01 11:20:42,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322260231] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:20:42,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:20:42,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-04-01 11:20:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180516288] [2023-04-01 11:20:42,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:20:42,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:20:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:20:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:20:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:20:42,523 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 11:20:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:20:42,580 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-04-01 11:20:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:20:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2023-04-01 11:20:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:20:42,584 INFO L225 Difference]: With dead ends: 54 [2023-04-01 11:20:42,584 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 11:20:42,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-04-01 11:20:42,585 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:20:42,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 124 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:20:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 11:20:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-04-01 11:20:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 11:20:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-04-01 11:20:42,596 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 32 [2023-04-01 11:20:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:20:42,597 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-04-01 11:20:42,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 11:20:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-04-01 11:20:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 11:20:42,598 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:42,598 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:42,612 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 11:20:42,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:42,804 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:42,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash 642777954, now seen corresponding path program 1 times [2023-04-01 11:20:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:42,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606699485] [2023-04-01 11:20:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:42,823 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:42,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239756919] [2023-04-01 11:20:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:42,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:42,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:42,827 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 11:20:42,830 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 11:20:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:42,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 11:20:42,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 11:20:43,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:20:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 11:20:43,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:43,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606699485] [2023-04-01 11:20:43,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:43,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239756919] [2023-04-01 11:20:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239756919] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:20:43,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:20:43,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-04-01 11:20:43,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862491669] [2023-04-01 11:20:43,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:20:43,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:20:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:20:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:20:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-01 11:20:43,097 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 11:20:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:20:43,221 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-04-01 11:20:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:20:43,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2023-04-01 11:20:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:20:43,222 INFO L225 Difference]: With dead ends: 58 [2023-04-01 11:20:43,222 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 11:20:43,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:20:43,224 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:20:43,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:20:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 11:20:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-04-01 11:20:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 11:20:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2023-04-01 11:20:43,237 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 37 [2023-04-01 11:20:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:20:43,237 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2023-04-01 11:20:43,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 11:20:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2023-04-01 11:20:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 11:20:43,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:43,238 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:43,244 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 11:20:43,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:43,445 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:43,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:43,445 INFO L85 PathProgramCache]: Analyzing trace with hash 664456897, now seen corresponding path program 1 times [2023-04-01 11:20:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:43,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284321166] [2023-04-01 11:20:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:43,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:43,455 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:43,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079132797] [2023-04-01 11:20:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:43,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:43,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:43,457 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 11:20:43,459 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 11:20:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:43,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 11:20:43,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 11:20:43,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:20:43,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284321166] [2023-04-01 11:20:43,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079132797] [2023-04-01 11:20:43,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079132797] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:20:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676152108] [2023-04-01 11:20:43,732 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 11:20:43,732 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:20:43,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:20:43,732 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:20:43,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:20:43,800 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:20:44,799 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 11:20:44,811 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 45 for LOIs [2023-04-01 11:20:44,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:20:44,818 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:20:47,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [676152108] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:20:47,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:20:47,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7] total 22 [2023-04-01 11:20:47,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882448983] [2023-04-01 11:20:47,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:20:47,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 11:20:47,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:20:47,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 11:20:47,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:20:47,116 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 11:20:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:20:48,727 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2023-04-01 11:20:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 11:20:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 42 [2023-04-01 11:20:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:20:48,728 INFO L225 Difference]: With dead ends: 79 [2023-04-01 11:20:48,728 INFO L226 Difference]: Without dead ends: 77 [2023-04-01 11:20:48,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:20:48,729 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:20:48,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 37 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 11:20:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-01 11:20:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2023-04-01 11:20:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 46 states have internal predecessors, (51), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 11:20:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2023-04-01 11:20:48,746 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 42 [2023-04-01 11:20:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:20:48,746 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2023-04-01 11:20:48,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 11:20:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2023-04-01 11:20:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 11:20:48,747 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:20:48,747 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:20:48,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 11:20:48,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 11:20:48,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:20:48,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:20:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash 706454379, now seen corresponding path program 1 times [2023-04-01 11:20:48,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:20:48,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365317732] [2023-04-01 11:20:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:48,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:20:48,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:20:48,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914072153] [2023-04-01 11:20:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:20:48,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:20:48,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:20:48,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:20:48,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 11:20:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:20:49,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 11:20:49,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:20:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 11:20:49,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:20:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 11:20:49,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:20:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365317732] [2023-04-01 11:20:49,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:20:49,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914072153] [2023-04-01 11:20:49,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914072153] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:20:49,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029661318] [2023-04-01 11:20:49,144 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-01 11:20:49,144 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:20:49,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:20:49,145 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:20:49,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:20:49,172 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:20:54,212 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:20:54,215 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 45 for LOIs [2023-04-01 11:20:54,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:20:54,221 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:04,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2740#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:21:04,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:21:04,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:21:04,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-04-01 11:21:04,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825146115] [2023-04-01 11:21:04,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:21:04,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:21:04,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:04,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:21:04,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=854, Unknown=1, NotChecked=0, Total=992 [2023-04-01 11:21:04,552 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-01 11:21:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:04,747 INFO L93 Difference]: Finished difference Result 196 states and 239 transitions. [2023-04-01 11:21:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:21:04,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) Word has length 51 [2023-04-01 11:21:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:04,749 INFO L225 Difference]: With dead ends: 196 [2023-04-01 11:21:04,749 INFO L226 Difference]: Without dead ends: 188 [2023-04-01 11:21:04,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=168, Invalid=1091, Unknown=1, NotChecked=0, Total=1260 [2023-04-01 11:21:04,751 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 77 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:04,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 149 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:21:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-04-01 11:21:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2023-04-01 11:21:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 115 states have internal predecessors, (135), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-04-01 11:21:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 222 transitions. [2023-04-01 11:21:04,777 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 222 transitions. Word has length 51 [2023-04-01 11:21:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:04,777 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 222 transitions. [2023-04-01 11:21:04,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 6 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 5 states have call successors, (18) [2023-04-01 11:21:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 222 transitions. [2023-04-01 11:21:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 11:21:04,778 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:04,779 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:21:04,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 11:21:04,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:04,983 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:04,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:04,984 INFO L85 PathProgramCache]: Analyzing trace with hash 423280189, now seen corresponding path program 1 times [2023-04-01 11:21:04,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:04,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479443930] [2023-04-01 11:21:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:04,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:04,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:04,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299365259] [2023-04-01 11:21:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:04,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:04,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:04,996 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:21:04,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 11:21:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:05,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 11:21:05,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 11:21:05,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 11:21:05,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:05,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479443930] [2023-04-01 11:21:05,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:05,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299365259] [2023-04-01 11:21:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299365259] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:21:05,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [602252749] [2023-04-01 11:21:05,165 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-01 11:21:05,165 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:21:05,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:21:05,165 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:21:05,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:21:05,198 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:21:09,736 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:21:09,740 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 45 for LOIs [2023-04-01 11:21:09,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:21:09,746 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:18,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3633#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:21:18,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:21:18,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:21:18,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-04-01 11:21:18,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132477972] [2023-04-01 11:21:18,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:21:18,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:21:18,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:21:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2023-04-01 11:21:18,075 INFO L87 Difference]: Start difference. First operand 180 states and 222 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 11:21:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:18,333 INFO L93 Difference]: Finished difference Result 268 states and 357 transitions. [2023-04-01 11:21:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:21:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2023-04-01 11:21:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:18,335 INFO L225 Difference]: With dead ends: 268 [2023-04-01 11:21:18,335 INFO L226 Difference]: Without dead ends: 248 [2023-04-01 11:21:18,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=112, Invalid=1077, Unknown=1, NotChecked=0, Total=1190 [2023-04-01 11:21:18,336 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 68 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:18,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 188 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:21:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-01 11:21:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 224. [2023-04-01 11:21:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 141 states have (on average 1.24822695035461) internal successors, (176), 144 states have internal predecessors, (176), 60 states have call successors, (60), 23 states have call predecessors, (60), 22 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-04-01 11:21:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 292 transitions. [2023-04-01 11:21:18,367 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 292 transitions. Word has length 52 [2023-04-01 11:21:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:18,368 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 292 transitions. [2023-04-01 11:21:18,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 11:21:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 292 transitions. [2023-04-01 11:21:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 11:21:18,369 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:18,369 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:21:18,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 11:21:18,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 11:21:18,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:18,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:18,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1582057506, now seen corresponding path program 1 times [2023-04-01 11:21:18,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:18,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617515660] [2023-04-01 11:21:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:18,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:18,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:18,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751098443] [2023-04-01 11:21:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:18,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:18,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:18,584 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:21:18,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 11:21:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:18,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 11:21:18,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 11:21:18,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 11:21:18,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617515660] [2023-04-01 11:21:18,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751098443] [2023-04-01 11:21:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751098443] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:21:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374440575] [2023-04-01 11:21:18,764 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-01 11:21:18,764 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:21:18,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:21:18,764 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:21:18,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:21:18,792 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 47 for LOIs [2023-04-01 11:21:23,692 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:21:23,694 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 45 for LOIs [2023-04-01 11:21:23,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 11:21:23,701 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:30,981 WARN L223 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 95 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)