/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:21:26,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:21:26,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:21:26,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:21:26,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:21:26,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:21:26,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:21:26,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:21:26,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:21:26,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:21:26,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:21:26,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:21:26,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:21:26,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:21:26,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:21:26,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:21:26,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:21:26,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:21:26,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:21:26,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:21:26,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:21:26,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:21:26,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:21:26,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:21:26,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 11:21:26,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:21:26,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:21:26,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:21:26,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:21:26,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:21:26,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:21:26,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:21:26,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:21:26,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:21:26,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:21:26,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:21:26,117 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 11:21:26,145 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:21:26,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:21:26,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:21:26,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:21:26,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:21:26,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:21:26,147 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:21:26,147 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:21:26,147 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:21:26,147 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:21:26,148 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:21:26,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:21:26,148 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:21:26,148 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:21:26,149 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:21:26,149 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:21:26,149 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:21:26,149 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:21:26,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:21:26,149 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:21:26,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:21:26,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:21:26,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:21:26,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:21:26,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:21:26,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:21:26,150 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:21:26,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:21:26,151 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:21:26,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:21:26,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:21:26,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:21:26,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:21:26,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:21:26,152 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:21:26,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:21:26,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:21:26,152 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:21:26,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:21:26,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:21:26,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:21:26,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:21:26,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:21:26,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:21:26,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:21:26,374 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:21:26,377 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:21:26,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2023-04-01 11:21:27,425 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:21:27,637 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:21:27,637 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2023-04-01 11:21:27,642 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff6c30d9/919aaa5c58f14c879c74de8ead20e175/FLAG1b0f7b1d9 [2023-04-01 11:21:27,652 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff6c30d9/919aaa5c58f14c879c74de8ead20e175 [2023-04-01 11:21:27,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:21:27,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:21:27,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:21:27,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:21:27,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:21:27,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2a7a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27, skipping insertion in model container [2023-04-01 11:21:27,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:21:27,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:21:27,789 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_valuebound2.c[490,503] [2023-04-01 11:21:27,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:21:27,813 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:21:27,823 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_valuebound2.c[490,503] [2023-04-01 11:21:27,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:21:27,842 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:21:27,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27 WrapperNode [2023-04-01 11:21:27,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:21:27,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:21:27,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:21:27,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:21:27,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,874 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:21:27,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:21:27,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:21:27,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:21:27,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (1/1) ... [2023-04-01 11:21:27,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:21:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:27,905 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 11:21:27,907 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 11:21:27,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:21:27,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:21:27,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:21:27,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:21:27,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:21:27,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:21:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:21:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:21:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:21:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:21:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:21:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:21:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:21:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:21:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:21:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:21:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:21:27,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:21:27,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:21:27,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:21:28,008 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:21:28,010 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:21:28,245 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:21:28,300 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:21:28,300 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:21:28,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:21:28 BoogieIcfgContainer [2023-04-01 11:21:28,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:21:28,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:21:28,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:21:28,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:21:28,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:21:27" (1/3) ... [2023-04-01 11:21:28,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433f5041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:21:28, skipping insertion in model container [2023-04-01 11:21:28,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:21:27" (2/3) ... [2023-04-01 11:21:28,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433f5041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:21:28, skipping insertion in model container [2023-04-01 11:21:28,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:21:28" (3/3) ... [2023-04-01 11:21:28,325 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2023-04-01 11:21:28,338 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:21:28,338 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:21:28,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:21:28,386 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;@c2ade5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:21:28,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:21:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 11:21:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 11:21:28,398 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:28,399 INFO L195 NwaCegarLoop]: trace histogram [6, 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 11:21:28,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:28,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash -106415626, now seen corresponding path program 1 times [2023-04-01 11:21:28,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:28,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553900208] [2023-04-01 11:21:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:28,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:28,546 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:28,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936094701] [2023-04-01 11:21:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:28,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:28,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:28,552 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 11:21:28,583 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 11:21:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:28,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:21:28,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 11:21:28,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:21:28,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:28,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553900208] [2023-04-01 11:21:28,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:28,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936094701] [2023-04-01 11:21:28,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936094701] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:21:28,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:21:28,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:21:28,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352667197] [2023-04-01 11:21:28,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:21:28,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:21:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:28,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:21:28,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:21:28,724 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 11:21:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:28,771 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2023-04-01 11:21:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:21:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 30 [2023-04-01 11:21:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:28,782 INFO L225 Difference]: With dead ends: 57 [2023-04-01 11:21:28,782 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 11:21:28,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 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 11:21:28,791 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:28,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:21:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 11:21:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 11:21:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:21:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-04-01 11:21:28,824 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 30 [2023-04-01 11:21:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:28,825 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-04-01 11:21:28,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 11:21:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-04-01 11:21:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 11:21:28,827 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:28,827 INFO L195 NwaCegarLoop]: trace histogram [6, 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 11:21:28,835 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 11:21:29,033 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 11:21:29,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:29,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1527902876, now seen corresponding path program 1 times [2023-04-01 11:21:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:29,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464705789] [2023-04-01 11:21:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:29,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:29,054 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:29,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260422985] [2023-04-01 11:21:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:29,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:29,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:29,056 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 11:21:29,067 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 11:21:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:29,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:21:29,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 11:21:29,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 11:21:29,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:29,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464705789] [2023-04-01 11:21:29,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:29,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260422985] [2023-04-01 11:21:29,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260422985] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:21:29,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131856806] [2023-04-01 11:21:29,290 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:21:29,291 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:21:29,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:21:29,298 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:21:29,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:21:29,438 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:21:30,630 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 11:21:30,638 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:21:30,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:21:30,647 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:33,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [131856806] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:21:33,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:21:33,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5] total 16 [2023-04-01 11:21:33,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537516403] [2023-04-01 11:21:33,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:21:33,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:21:33,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:33,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:21:33,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-04-01 11:21:33,644 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 13 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 9 states have internal predecessors, (10), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 11:21:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:35,458 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 11:21:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:21:35,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 9 states have internal predecessors, (10), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 6 states have call successors, (7) Word has length 31 [2023-04-01 11:21:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:35,459 INFO L225 Difference]: With dead ends: 42 [2023-04-01 11:21:35,459 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 11:21:35,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:21:35,461 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:35,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 7 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:21:35,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 11:21:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-01 11:21:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:21:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2023-04-01 11:21:35,475 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 31 [2023-04-01 11:21:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:35,476 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2023-04-01 11:21:35,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 9 states have internal predecessors, (10), 7 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 11:21:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2023-04-01 11:21:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 11:21:35,477 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:35,477 INFO L195 NwaCegarLoop]: trace histogram [6, 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 11:21:35,485 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 11:21:35,683 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 11:21:35,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:35,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash -115048975, now seen corresponding path program 1 times [2023-04-01 11:21:35,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:35,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069880724] [2023-04-01 11:21:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:35,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:35,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:35,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478551226] [2023-04-01 11:21:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:35,699 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 11:21:35,715 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 11:21:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:35,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 11:21:35,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 11:21:35,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 11:21:35,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:35,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069880724] [2023-04-01 11:21:35,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:35,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478551226] [2023-04-01 11:21:35,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478551226] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:21:35,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:21:35,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-01 11:21:35,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269684872] [2023-04-01 11:21:35,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:21:35,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:21:35,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:21:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-01 11:21:35,875 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 11:21:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:35,926 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 11:21:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:21:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 32 [2023-04-01 11:21:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:35,929 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:21:35,929 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 11:21:35,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:21:35,934 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 116 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 11:21:35,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:21:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 11:21:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-01 11:21:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:21:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-04-01 11:21:35,959 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 32 [2023-04-01 11:21:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:35,959 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-04-01 11:21:35,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 11:21:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-04-01 11:21:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 11:21:35,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:35,962 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:21:35,971 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 11:21:36,168 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 11:21:36,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:36,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash 479602003, now seen corresponding path program 1 times [2023-04-01 11:21:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393820355] [2023-04-01 11:21:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:36,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:36,181 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:36,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182362857] [2023-04-01 11:21:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:36,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:36,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:36,183 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 11:21:36,186 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 11:21:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:36,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 11:21:36,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 11:21:36,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 11:21:36,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:36,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393820355] [2023-04-01 11:21:36,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:36,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182362857] [2023-04-01 11:21:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182362857] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:21:36,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:21:36,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-04-01 11:21:36,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090156603] [2023-04-01 11:21:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:21:36,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:21:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:21:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-04-01 11:21:36,530 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 11:21:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:36,585 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-04-01 11:21:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:21:36,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2023-04-01 11:21:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:36,587 INFO L225 Difference]: With dead ends: 51 [2023-04-01 11:21:36,587 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 11:21:36,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-04-01 11:21:36,588 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:36,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 125 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:21:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 11:21:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-04-01 11:21:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 11:21:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2023-04-01 11:21:36,604 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 37 [2023-04-01 11:21:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:36,604 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2023-04-01 11:21:36,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 11:21:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2023-04-01 11:21:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 11:21:36,605 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:36,605 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1] [2023-04-01 11:21:36,616 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 11:21:36,813 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 11:21:36,813 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:36,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:36,813 INFO L85 PathProgramCache]: Analyzing trace with hash 409789169, now seen corresponding path program 1 times [2023-04-01 11:21:36,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:36,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89979278] [2023-04-01 11:21:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:36,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:36,825 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:36,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380296178] [2023-04-01 11:21:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:36,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:36,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:36,826 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 11:21:36,840 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 11:21:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:36,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 11:21:36,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 11:21:37,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:37,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:37,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89979278] [2023-04-01 11:21:37,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:37,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380296178] [2023-04-01 11:21:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380296178] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:21:37,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843177157] [2023-04-01 11:21:37,094 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 11:21:37,094 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:21:37,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:21:37,095 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:21:37,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:21:37,122 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:21:37,922 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 11:21:37,933 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:21:37,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:21:37,940 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:41,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [843177157] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:21:41,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:21:41,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 21 [2023-04-01 11:21:41,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094643448] [2023-04-01 11:21:41,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:21:41,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:21:41,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:21:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:21:41,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-04-01 11:21:41,447 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 13 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 9 states have internal predecessors, (13), 7 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 11:21:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:21:43,741 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2023-04-01 11:21:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:21:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 9 states have internal predecessors, (13), 7 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) Word has length 42 [2023-04-01 11:21:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:21:43,743 INFO L225 Difference]: With dead ends: 69 [2023-04-01 11:21:43,743 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 11:21:43,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:21:43,744 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 82 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 11:21:43,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 9 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 11:21:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 11:21:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-04-01 11:21:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 11:21:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2023-04-01 11:21:43,764 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 42 [2023-04-01 11:21:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:21:43,764 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2023-04-01 11:21:43,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 9 states have internal predecessors, (13), 7 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 11:21:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2023-04-01 11:21:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 11:21:43,765 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:21:43,766 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 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, 1, 1, 1] [2023-04-01 11:21:43,775 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 11:21:43,971 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 11:21:43,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:21:43,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:21:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1081154470, now seen corresponding path program 1 times [2023-04-01 11:21:43,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:21:43,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607744604] [2023-04-01 11:21:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:43,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:21:43,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:21:43,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396781941] [2023-04-01 11:21:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:21:43,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:21:43,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:21:43,990 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 11:21:43,992 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 11:21:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:21:44,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 11:21:44,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:21:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 11:21:44,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:21:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 11:21:44,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:21:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607744604] [2023-04-01 11:21:44,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:21:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396781941] [2023-04-01 11:21:44,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396781941] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:21:44,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1799211206] [2023-04-01 11:21:44,181 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-01 11:21:44,181 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:21:44,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:21:44,182 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:21:44,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:21:44,204 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:21:48,577 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:21:48,580 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:21:48,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:21:48,586 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:21:56,615 WARN L223 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 119 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 11:22:11,049 WARN L223 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 106 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 11:22:18,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2044#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:22:18,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:22:18,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:22:18,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-04-01 11:22:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805349986] [2023-04-01 11:22:18,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:22:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:22:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:22:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:22:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:22:18,581 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 11:22:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:22:18,778 INFO L93 Difference]: Finished difference Result 107 states and 146 transitions. [2023-04-01 11:22:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:22:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2023-04-01 11:22:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:22:18,780 INFO L225 Difference]: With dead ends: 107 [2023-04-01 11:22:18,780 INFO L226 Difference]: Without dead ends: 99 [2023-04-01 11:22:18,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2023-04-01 11:22:18,781 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 34 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:22:18,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:22:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-01 11:22:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2023-04-01 11:22:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-01 11:22:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 122 transitions. [2023-04-01 11:22:18,809 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 122 transitions. Word has length 56 [2023-04-01 11:22:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:22:18,810 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 122 transitions. [2023-04-01 11:22:18,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-01 11:22:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 122 transitions. [2023-04-01 11:22:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 11:22:18,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:22:18,811 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:22:18,823 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 11:22:19,017 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 11:22:19,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:22:19,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:22:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 167472073, now seen corresponding path program 1 times [2023-04-01 11:22:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:22:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18720635] [2023-04-01 11:22:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:22:19,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:22:19,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57071827] [2023-04-01 11:22:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:22:19,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:22:19,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:22:19,044 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 11:22:19,046 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 11:22:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:22:19,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 11:22:19,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:22:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 11:22:19,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:22:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-01 11:22:19,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:22:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18720635] [2023-04-01 11:22:19,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:22:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57071827] [2023-04-01 11:22:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57071827] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:22:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263769118] [2023-04-01 11:22:19,419 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-04-01 11:22:19,419 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:22:19,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:22:19,420 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:22:19,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:22:19,441 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:22:22,256 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-01 11:22:22,261 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:22:22,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:22:22,267 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:22:29,172 WARN L223 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 119 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)