/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:55:27,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:55:27,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:55:27,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:55:27,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:55:27,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:55:27,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:55:27,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:55:27,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:55:27,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:55:27,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:55:27,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:55:27,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:55:27,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:55:27,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:55:27,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:55:27,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:55:27,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:55:27,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:55:27,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:55:27,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:55:27,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:55:27,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:55:27,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:55:27,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:55:27,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:55:27,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:55:27,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:55:27,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:55:27,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:55:27,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:55:27,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:55:27,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:55:27,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:55:27,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:55:27,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:55:27,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:55:27,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:55:27,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:55:27,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:55:27,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:55:27,128 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 [2023-04-02 22:55:27,158 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:55:27,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:55:27,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:55:27,160 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:55:27,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:55:27,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:55:27,161 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:55:27,161 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:55:27,161 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:55:27,162 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:55:27,162 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:55:27,163 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:55:27,163 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:55:27,163 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:55:27,163 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:55:27,163 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:55:27,163 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:55:27,163 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:55:27,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:55:27,164 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:55:27,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:55:27,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:55:27,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:55:27,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:55:27,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:55:27,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:55:27,166 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:55:27,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:55:27,166 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:55:27,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:55:27,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:55:27,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:55:27,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:55:27,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:55:27,167 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:55:27,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:55:27,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:55:27,167 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:55:27,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:55:27,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:55:27,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:55:27,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:55:27,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:55:27,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:55:27,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:55:27,415 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:55:27,415 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:55:27,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2023-04-02 22:55:28,525 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:55:28,700 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:55:28,700 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound2.c [2023-04-02 22:55:28,705 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ff788ab/31185ce9622d4d14a56f733c08139f16/FLAG662781945 [2023-04-02 22:55:28,717 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ff788ab/31185ce9622d4d14a56f733c08139f16 [2023-04-02 22:55:28,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:55:28,720 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:55:28,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:55:28,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:55:28,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:55:28,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44c8eb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28, skipping insertion in model container [2023-04-02 22:55:28,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:55:28,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:55:28,851 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/egcd3-ll_unwindbound2.c[490,503] [2023-04-02 22:55:28,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:55:28,875 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:55:28,883 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/egcd3-ll_unwindbound2.c[490,503] [2023-04-02 22:55:28,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:55:28,901 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:55:28,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28 WrapperNode [2023-04-02 22:55:28,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:55:28,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:55:28,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:55:28,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:55:28,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,929 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:55:28,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:55:28,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:55:28,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:55:28,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (1/1) ... [2023-04-02 22:55:28,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:55:28,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:28,959 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) [2023-04-02 22:55:28,979 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 [2023-04-02 22:55:28,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:55:28,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:55:28,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:55:28,994 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:55:28,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:55:28,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:55:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:55:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:55:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:55:28,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:55:28,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 22:55:28,996 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:55:28,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:55:28,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:55:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:55:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:55:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:55:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:55:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:55:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:55:29,076 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:55:29,077 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:55:29,302 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:55:29,317 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:55:29,317 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 22:55:29,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:55:29 BoogieIcfgContainer [2023-04-02 22:55:29,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:55:29,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:55:29,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:55:29,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:55:29,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:55:28" (1/3) ... [2023-04-02 22:55:29,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f44768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:55:29, skipping insertion in model container [2023-04-02 22:55:29,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:55:28" (2/3) ... [2023-04-02 22:55:29,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f44768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:55:29, skipping insertion in model container [2023-04-02 22:55:29,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:55:29" (3/3) ... [2023-04-02 22:55:29,325 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound2.c [2023-04-02 22:55:29,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:55:29,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:55:29,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:55:29,413 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;@42556351, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:55:29,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:55:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 22:55:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 22:55:29,422 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:29,423 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:29,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:29,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:29,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1884191244, now seen corresponding path program 1 times [2023-04-02 22:55:29,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:29,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439706647] [2023-04-02 22:55:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:29,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:29,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:29,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439706647] [2023-04-02 22:55:29,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 22:55:29,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341636591] [2023-04-02 22:55:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:29,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:29,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:29,568 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) [2023-04-02 22:55:29,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:55:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:29,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 22:55:29,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:29,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:29,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341636591] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:29,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:29,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:55:29,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552387587] [2023-04-02 22:55:29,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:29,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:55:29,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:55:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:55:29,722 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:55:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:29,764 INFO L93 Difference]: Finished difference Result 62 states and 94 transitions. [2023-04-02 22:55:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:55:29,768 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-04-02 22:55:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:29,774 INFO L225 Difference]: With dead ends: 62 [2023-04-02 22:55:29,775 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 22:55:29,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:55:29,783 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 [2023-04-02 22:55:29,784 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] [2023-04-02 22:55:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 22:55:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-02 22:55:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:55:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-04-02 22:55:29,823 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 17 [2023-04-02 22:55:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:29,825 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-04-02 22:55:29,825 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:55:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-04-02 22:55:29,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 22:55:29,826 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:29,826 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:29,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:30,032 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 [2023-04-02 22:55:30,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:30,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 952486133, now seen corresponding path program 1 times [2023-04-02 22:55:30,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:30,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488789633] [2023-04-02 22:55:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:30,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:30,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:30,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841222966] [2023-04-02 22:55:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:30,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:30,068 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) [2023-04-02 22:55:30,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:55:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:30,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:55:30,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:30,197 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:30,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:30,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488789633] [2023-04-02 22:55:30,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:30,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841222966] [2023-04-02 22:55:30,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841222966] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:30,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:30,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 22:55:30,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100458896] [2023-04-02 22:55:30,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:30,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:55:30,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:55:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:55:30,201 INFO L87 Difference]: Start difference. First operand 32 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:30,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:30,238 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-02 22:55:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 22:55:30,253 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2023-04-02 22:55:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:30,254 INFO L225 Difference]: With dead ends: 41 [2023-04-02 22:55:30,254 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 22:55:30,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:55:30,256 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:30,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:55:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 22:55:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 22:55:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:55:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-04-02 22:55:30,265 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 18 [2023-04-02 22:55:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:30,265 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-04-02 22:55:30,266 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-04-02 22:55:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 22:55:30,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:30,267 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:30,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:30,472 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 [2023-04-02 22:55:30,473 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:30,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:30,473 INFO L85 PathProgramCache]: Analyzing trace with hash -552718471, now seen corresponding path program 1 times [2023-04-02 22:55:30,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:30,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56896246] [2023-04-02 22:55:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:30,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:30,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:30,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596816256] [2023-04-02 22:55:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:30,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:30,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:30,505 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) [2023-04-02 22:55:30,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:55:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:30,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:55:30,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:55:30,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:30,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56896246] [2023-04-02 22:55:30,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596816256] [2023-04-02 22:55:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596816256] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:30,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:55:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202750784] [2023-04-02 22:55:30,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:30,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:55:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:55:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:55:30,606 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:55:30,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:30,700 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2023-04-02 22:55:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:55:30,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-02 22:55:30,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:30,702 INFO L225 Difference]: With dead ends: 54 [2023-04-02 22:55:30,702 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 22:55:30,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 22:55:30,704 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:30,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:55:30,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 22:55:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-04-02 22:55:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:55:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-04-02 22:55:30,713 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 19 [2023-04-02 22:55:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:30,713 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-04-02 22:55:30,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 22:55:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-04-02 22:55:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 22:55:30,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:30,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:30,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:30,920 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 [2023-04-02 22:55:30,921 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:30,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:30,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1491876193, now seen corresponding path program 1 times [2023-04-02 22:55:30,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:30,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680877232] [2023-04-02 22:55:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:30,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:30,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:30,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796144238] [2023-04-02 22:55:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:30,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:30,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:30,939 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) [2023-04-02 22:55:30,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:55:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:31,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:55:31,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:31,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:31,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:31,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680877232] [2023-04-02 22:55:31,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:31,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796144238] [2023-04-02 22:55:31,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796144238] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:31,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:31,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 22:55:31,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141486879] [2023-04-02 22:55:31,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:31,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 22:55:31,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:31,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 22:55:31,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:55:31,080 INFO L87 Difference]: Start difference. First operand 35 states and 45 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:31,111 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2023-04-02 22:55:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 22:55:31,112 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-04-02 22:55:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:31,113 INFO L225 Difference]: With dead ends: 59 [2023-04-02 22:55:31,113 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 22:55:31,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 22:55:31,114 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:31,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:55:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 22:55:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-02 22:55:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 22:55:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-04-02 22:55:31,122 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 24 [2023-04-02 22:55:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:31,122 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-04-02 22:55:31,122 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-04-02 22:55:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 22:55:31,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:31,123 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:31,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:31,329 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 [2023-04-02 22:55:31,329 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:31,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash -917044466, now seen corresponding path program 1 times [2023-04-02 22:55:31,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:31,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138981968] [2023-04-02 22:55:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:31,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:31,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:31,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147190436] [2023-04-02 22:55:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:31,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:31,387 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) [2023-04-02 22:55:31,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:55:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:55:31,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 22:55:31,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:55:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 22:55:31,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:55:31,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:55:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138981968] [2023-04-02 22:55:31,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:55:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147190436] [2023-04-02 22:55:31,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147190436] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:55:31,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:55:31,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 22:55:31,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122928984] [2023-04-02 22:55:31,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:55:31,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 22:55:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:55:31,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 22:55:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 22:55:31,514 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:31,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:55:31,557 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-02 22:55:31,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:55:31,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-04-02 22:55:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:55:31,560 INFO L225 Difference]: With dead ends: 54 [2023-04-02 22:55:31,560 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 22:55:31,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-02 22:55:31,566 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:55:31,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:55:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 22:55:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 22:55:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:55:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-04-02 22:55:31,573 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 24 [2023-04-02 22:55:31,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:55:31,573 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-04-02 22:55:31,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 22:55:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-04-02 22:55:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 22:55:31,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:55:31,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:55:31,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:31,774 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 [2023-04-02 22:55:31,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:55:31,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:55:31,775 INFO L85 PathProgramCache]: Analyzing trace with hash -575541792, now seen corresponding path program 1 times [2023-04-02 22:55:31,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:55:31,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055110340] [2023-04-02 22:55:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:31,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:55:31,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:55:31,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481856804] [2023-04-02 22:55:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:55:31,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:55:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:55:31,791 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) [2023-04-02 22:55:31,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 22:55:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 22:55:31,840 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 22:55:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 22:55:31,877 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 22:55:31,877 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 22:55:31,878 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 22:55:31,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 22:55:32,081 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 [2023-04-02 22:55:32,084 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-04-02 22:55:32,086 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 22:55:32,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 10:55:32 BoogieIcfgContainer [2023-04-02 22:55:32,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 22:55:32,107 INFO L158 Benchmark]: Toolchain (without parser) took 3387.79ms. Allocated memory was 183.5MB in the beginning and 261.1MB in the end (delta: 77.6MB). Free memory was 137.3MB in the beginning and 157.5MB in the end (delta: -20.3MB). Peak memory consumption was 58.6MB. Max. memory is 8.0GB. [2023-04-02 22:55:32,108 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 183.5MB. Free memory is still 136.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 22:55:32,108 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.27ms. Allocated memory is still 183.5MB. Free memory was 137.3MB in the beginning and 126.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 22:55:32,108 INFO L158 Benchmark]: Boogie Preprocessor took 28.90ms. Allocated memory is still 183.5MB. Free memory was 126.4MB in the beginning and 124.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 22:55:32,109 INFO L158 Benchmark]: RCFGBuilder took 386.88ms. Allocated memory is still 183.5MB. Free memory was 124.7MB in the beginning and 111.4MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-02 22:55:32,109 INFO L158 Benchmark]: TraceAbstraction took 2786.78ms. Allocated memory was 183.5MB in the beginning and 261.1MB in the end (delta: 77.6MB). Free memory was 110.7MB in the beginning and 157.5MB in the end (delta: -46.8MB). Peak memory consumption was 32.4MB. Max. memory is 8.0GB. [2023-04-02 22:55:32,111 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 183.5MB. Free memory is still 136.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 181.27ms. Allocated memory is still 183.5MB. Free memory was 137.3MB in the beginning and 126.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.90ms. Allocated memory is still 183.5MB. Free memory was 126.4MB in the beginning and 124.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 386.88ms. Allocated memory is still 183.5MB. Free memory was 124.7MB in the beginning and 111.4MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 2786.78ms. Allocated memory was 183.5MB in the beginning and 261.1MB in the end (delta: 77.6MB). Free memory was 110.7MB in the beginning and 157.5MB in the end (delta: -46.8MB). Peak memory consumption was 32.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=1, b=2, counter=0, p=1, q=0, r=0, s=1, x=1, y=2] [L34] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, counter++=0, counter=1, p=1, q=0, r=0, s=1, x=1, y=2] [L34] COND TRUE counter++<2 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=1, b=2, c=1, counter=1, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L41] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, c=1, counter++=1, counter=2, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L41] COND TRUE counter++<2 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, y=2] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter++=2, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, y=2] [L34] COND FALSE !(counter++<2) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 72 mSDsluCounter, 429 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 251 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 108 IncrementalHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 178 mSDtfsCounter, 108 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 144 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 198 SizeOfPredicates, 8 NumberOfNonLiveVariables, 517 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 12/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-02 22:55:32,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...