/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/prodbin-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:32:06,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:32:06,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:32:06,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:32:06,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:32:06,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:32:06,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:32:06,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:32:06,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:32:06,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:32:06,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:32:06,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:32:06,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:32:06,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:32:06,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:32:06,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:32:06,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:32:06,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:32:06,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:32:06,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:32:06,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:32:06,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:32:06,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:32:06,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:32:06,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:32:06,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:32:06,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:32:06,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:32:06,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:32:06,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:32:06,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:32:06,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:32:06,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:32:06,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:32:06,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:32:06,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:32:06,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:32:06,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:32:06,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:32:06,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:32:06,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:32:06,946 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 11:32:06,982 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:32:06,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:32:06,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:32:06,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:32:06,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:32:06,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:32:06,984 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:32:06,984 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:32:06,984 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:32:06,984 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:32:06,984 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:32:06,984 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:32:06,984 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:32:06,985 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:32:06,985 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:32:06,985 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:32:06,985 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:32:06,985 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:32:06,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:32:06,986 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:32:06,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:32:06,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:32:06,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:32:06,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:32:06,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:32:06,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:32:06,987 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:32:06,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:32:06,988 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:32:06,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:32:06,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:32:06,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:32:06,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:32:06,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:32:06,989 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:32:06,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:32:06,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:32:06,989 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:32:06,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:32:06,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:32:06,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:32:06,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:32:07,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:32:07,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:32:07,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:32:07,215 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:32:07,215 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:32:07,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c [2023-04-01 11:32:08,375 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:32:08,558 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:32:08,559 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c [2023-04-01 11:32:08,564 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a18e9f608/92d776ed411a46ba9ee6cb8bbc7ea6b0/FLAGb3a8f4557 [2023-04-01 11:32:08,580 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a18e9f608/92d776ed411a46ba9ee6cb8bbc7ea6b0 [2023-04-01 11:32:08,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:32:08,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:32:08,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:32:08,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:32:08,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:32:08,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@563ef108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08, skipping insertion in model container [2023-04-01 11:32:08,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:32:08,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:32:08,736 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/prodbin-ll_valuebound2.c[537,550] [2023-04-01 11:32:08,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:32:08,760 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:32:08,768 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/prodbin-ll_valuebound2.c[537,550] [2023-04-01 11:32:08,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:32:08,782 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:32:08,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08 WrapperNode [2023-04-01 11:32:08,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:32:08,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:32:08,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:32:08,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:32:08,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,808 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:32:08,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:32:08,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:32:08,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:32:08,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (1/1) ... [2023-04-01 11:32:08,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:32:08,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:32:08,836 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 11:32:08,847 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 11:32:08,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:32:08,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:32:08,872 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:32:08,876 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:32:08,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:32:08,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:32:08,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:32:08,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:32:08,876 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:32:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:32:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:32:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:32:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:32:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:32:08,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:32:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:32:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:32:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:32:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:32:08,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:32:08,931 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:32:08,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:32:09,085 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:32:09,146 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:32:09,146 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:32:09,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:32:09 BoogieIcfgContainer [2023-04-01 11:32:09,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:32:09,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:32:09,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:32:09,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:32:09,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:32:08" (1/3) ... [2023-04-01 11:32:09,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4cd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:32:09, skipping insertion in model container [2023-04-01 11:32:09,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:32:08" (2/3) ... [2023-04-01 11:32:09,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4cd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:32:09, skipping insertion in model container [2023-04-01 11:32:09,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:32:09" (3/3) ... [2023-04-01 11:32:09,158 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound2.c [2023-04-01 11:32:09,174 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:32:09,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:32:09,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:32:09,248 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;@6b60e756, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:32:09,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:32:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 11:32:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:32:09,259 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:32:09,260 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:32:09,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:32:09,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:32:09,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1830456286, now seen corresponding path program 1 times [2023-04-01 11:32:09,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:32:09,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233277331] [2023-04-01 11:32:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:32:09,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:32:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:32:09,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:32:09,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233277331] [2023-04-01 11:32:09,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 11:32:09,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494067334] [2023-04-01 11:32:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:32:09,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:32:09,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:32:09,376 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 11:32:09,405 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 11:32:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:32:09,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 11:32:09,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:32:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:32:09,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:32:09,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494067334] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:32:09,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:32:09,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:32:09,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19864597] [2023-04-01 11:32:09,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:32:09,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:32:09,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:32:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:32:09,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:32:09,545 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:32:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:32:09,589 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 11:32:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:32:09,591 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-04-01 11:32:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:32:09,597 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:32:09,598 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 11:32:09,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 11:32:09,606 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:32:09,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:32:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 11:32:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 11:32:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 11:32:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-04-01 11:32:09,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 21 [2023-04-01 11:32:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:32:09,639 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-04-01 11:32:09,639 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:32:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-04-01 11:32:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:32:09,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:32:09,640 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:32:09,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:32:09,842 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 11:32:09,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:32:09,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:32:09,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1775908965, now seen corresponding path program 1 times [2023-04-01 11:32:09,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:32:09,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634890874] [2023-04-01 11:32:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:32:09,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:32:09,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:32:09,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790481206] [2023-04-01 11:32:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:32:09,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:32:09,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:32:09,866 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 11:32:09,875 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 11:32:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:32:09,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 11:32:09,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:32:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 11:32:10,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:32:10,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:32:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634890874] [2023-04-01 11:32:10,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:32:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790481206] [2023-04-01 11:32:10,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790481206] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:32:10,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:32:10,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 11:32:10,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106469632] [2023-04-01 11:32:10,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:32:10,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:32:10,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:32:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:32:10,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:32:10,075 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:32:10,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:32:10,143 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-04-01 11:32:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:32:10,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-04-01 11:32:10,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:32:10,144 INFO L225 Difference]: With dead ends: 36 [2023-04-01 11:32:10,144 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 11:32:10,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 11:32:10,146 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:32:10,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:32:10,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 11:32:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 11:32:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 11:32:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-01 11:32:10,152 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2023-04-01 11:32:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:32:10,153 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-01 11:32:10,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:32:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-01 11:32:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 11:32:10,154 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:32:10,154 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:32:10,165 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 11:32:10,360 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 11:32:10,361 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:32:10,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:32:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash 936039800, now seen corresponding path program 1 times [2023-04-01 11:32:10,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:32:10,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497012024] [2023-04-01 11:32:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:32:10,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:32:10,388 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:32:10,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505633683] [2023-04-01 11:32:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:32:10,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:32:10,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:32:10,407 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 11:32:10,408 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 11:32:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:32:10,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 11:32:10,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:32:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 11:32:11,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:32:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 11:32:17,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:32:17,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497012024] [2023-04-01 11:32:17,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:32:17,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505633683] [2023-04-01 11:32:17,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505633683] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:32:17,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1646211506] [2023-04-01 11:32:17,308 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:32:17,308 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:32:17,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:32:17,315 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:32:17,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:32:17,412 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:32:18,280 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-04-01 11:32:18,311 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:32:18,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:32:18,321 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:32:19,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '529#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:32:19,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:32:19,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:32:19,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2023-04-01 11:32:19,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588919118] [2023-04-01 11:32:19,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:32:19,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 11:32:19,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:32:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 11:32:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:32:19,499 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 11:32:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:32:23,306 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-04-01 11:32:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 11:32:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 28 [2023-04-01 11:32:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:32:23,309 INFO L225 Difference]: With dead ends: 44 [2023-04-01 11:32:23,309 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 11:32:23,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:32:23,310 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:32:23,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 100 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:32:23,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 11:32:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-04-01 11:32:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 11:32:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-04-01 11:32:23,321 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2023-04-01 11:32:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:32:23,321 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-04-01 11:32:23,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-04-01 11:32:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-04-01 11:32:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 11:32:23,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:32:23,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:32:23,332 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 11:32:23,529 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 11:32:23,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:32:23,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:32:23,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1754869888, now seen corresponding path program 1 times [2023-04-01 11:32:23,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:32:23,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329719153] [2023-04-01 11:32:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:32:23,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:32:23,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:32:23,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037121870] [2023-04-01 11:32:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:32:23,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:32:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:32:23,558 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 11:32:23,559 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 11:32:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:32:23,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 11:32:23,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:32:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:32:23,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:32:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 11:32:23,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:32:23,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329719153] [2023-04-01 11:32:23,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:32:23,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037121870] [2023-04-01 11:32:23,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037121870] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:32:23,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223852335] [2023-04-01 11:32:23,749 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:32:23,749 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:32:23,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:32:23,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:32:23,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:32:23,779 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:32:24,277 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2023-04-01 11:32:24,306 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:32:24,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:32:24,315 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:32:25,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '890#(and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:32:25,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:32:25,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:32:25,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-04-01 11:32:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852832727] [2023-04-01 11:32:25,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:32:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:32:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:32:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:32:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-04-01 11:32:25,148 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-01 11:32:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:32:25,255 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-04-01 11:32:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:32:25,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 34 [2023-04-01 11:32:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:32:25,256 INFO L225 Difference]: With dead ends: 47 [2023-04-01 11:32:25,256 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 11:32:25,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:32:25,258 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:32:25,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 111 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:32:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 11:32:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 11:32:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 11:32:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-04-01 11:32:25,267 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 34 [2023-04-01 11:32:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:32:25,267 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-04-01 11:32:25,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-01 11:32:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-04-01 11:32:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 11:32:25,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:32:25,269 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:32:25,279 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 11:32:25,474 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 11:32:25,475 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:32:25,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:32:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash -689370715, now seen corresponding path program 2 times [2023-04-01 11:32:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:32:25,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622387561] [2023-04-01 11:32:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:32:25,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:32:25,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:32:25,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395431479] [2023-04-01 11:32:25,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:32:25,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:32:25,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:32:25,496 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 11:32:25,499 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 11:32:25,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 11:32:25,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:32:25,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 11:32:25,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:32:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:32:25,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:32:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 11:32:26,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:32:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622387561] [2023-04-01 11:32:26,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:32:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395431479] [2023-04-01 11:32:26,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395431479] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 11:32:26,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:32:26,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2023-04-01 11:32:26,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453342330] [2023-04-01 11:32:26,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:32:26,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 11:32:26,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:32:26,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 11:32:26,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-04-01 11:32:26,641 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 11:32:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:32:27,219 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2023-04-01 11:32:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:32:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2023-04-01 11:32:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:32:27,221 INFO L225 Difference]: With dead ends: 44 [2023-04-01 11:32:27,221 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 11:32:27,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-04-01 11:32:27,222 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:32:27,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 71 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:32:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 11:32:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 11:32:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 11:32:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 11:32:27,223 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2023-04-01 11:32:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:32:27,223 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 11:32:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 11:32:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 11:32:27,224 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 11:32:27,228 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 11:32:27,237 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 11:32:27,436 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 11:32:27,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 11:32:28,290 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 6) no Hoare annotation was computed. [2023-04-01 11:32:28,291 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 6) no Hoare annotation was computed. [2023-04-01 11:32:28,291 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 11) the Hoare annotation is: true [2023-04-01 11:32:28,291 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2023-04-01 11:32:28,291 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~a~0) (<= main_~a~0 2)) [2023-04-01 11:32:28,291 INFO L895 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~b~0 2) (<= 0 main_~a~0) (<= main_~a~0 2) (<= 0 main_~b~0)) [2023-04-01 11:32:28,291 INFO L902 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2023-04-01 11:32:28,291 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2023-04-01 11:32:28,291 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-04-01 11:32:28,291 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-04-01 11:32:28,291 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 20 49) the Hoare annotation is: true [2023-04-01 11:32:28,292 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse4 (= main_~z~0 0)) (.cse0 (<= main_~b~0 2)) (.cse1 (<= 0 main_~a~0)) (.cse2 (<= main_~a~0 2)) (.cse3 (<= 1 main_~b~0))) (or (and (<= 0 main_~y~0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) .cse0 .cse1 (<= main_~y~0 0) .cse2 .cse3) (and .cse4 (= main_~y~0 (div main_~b~0 2)) (not (= (mod main_~y~0 2) 0)) (= (* main_~a~0 2) main_~x~0) .cse1 .cse2 (= (div (+ (- 1) main_~b~0) 2) 0)) (and .cse4 .cse0 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 (= main_~a~0 main_~x~0)))) [2023-04-01 11:32:28,292 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= main_~z~0 .cse0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= main_~b~0 2) (<= 0 main_~a~0) (<= main_~a~0 2) (<= 1 main_~b~0))) [2023-04-01 11:32:28,292 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2023-04-01 11:32:28,292 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse4 (= main_~z~0 0)) (.cse0 (<= main_~b~0 2)) (.cse1 (<= 0 main_~a~0)) (.cse2 (<= main_~a~0 2)) (.cse3 (<= 1 main_~b~0))) (or (and (<= 0 main_~y~0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) .cse0 .cse1 (<= main_~y~0 0) .cse2 .cse3) (and .cse4 (= main_~y~0 (div main_~b~0 2)) (not (= (mod main_~y~0 2) 0)) (= (* main_~a~0 2) main_~x~0) .cse1 .cse2 (= (div (+ (- 1) main_~b~0) 2) 0)) (and .cse4 .cse0 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 (= main_~a~0 main_~x~0)))) [2023-04-01 11:32:28,292 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2023-04-01 11:32:28,292 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 11:32:28,292 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-01 11:32:28,292 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-01 11:32:28,293 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-01 11:32:28,293 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-01 11:32:28,293 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 11:32:28,293 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2023-04-01 11:32:28,293 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2023-04-01 11:32:28,293 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2023-04-01 11:32:28,294 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2023-04-01 11:32:28,294 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 18) the Hoare annotation is: true [2023-04-01 11:32:28,294 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2023-04-01 11:32:28,297 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-04-01 11:32:28,298 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 11:32:28,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 11:32:28 BoogieIcfgContainer [2023-04-01 11:32:28,316 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 11:32:28,316 INFO L158 Benchmark]: Toolchain (without parser) took 19733.20ms. Allocated memory was 328.2MB in the beginning and 394.3MB in the end (delta: 66.1MB). Free memory was 268.1MB in the beginning and 140.0MB in the end (delta: 128.0MB). Peak memory consumption was 194.4MB. Max. memory is 8.0GB. [2023-04-01 11:32:28,317 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 202.4MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 11:32:28,317 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.11ms. Allocated memory is still 328.2MB. Free memory was 267.8MB in the beginning and 257.5MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 11:32:28,317 INFO L158 Benchmark]: Boogie Preprocessor took 27.33ms. Allocated memory is still 328.2MB. Free memory was 257.5MB in the beginning and 255.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 11:32:28,317 INFO L158 Benchmark]: RCFGBuilder took 337.92ms. Allocated memory is still 328.2MB. Free memory was 255.9MB in the beginning and 242.9MB in the end (delta: 13.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-04-01 11:32:28,321 INFO L158 Benchmark]: TraceAbstraction took 19163.33ms. Allocated memory was 328.2MB in the beginning and 394.3MB in the end (delta: 66.1MB). Free memory was 242.3MB in the beginning and 140.0MB in the end (delta: 102.3MB). Peak memory consumption was 169.2MB. Max. memory is 8.0GB. [2023-04-01 11:32:28,322 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 202.4MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.11ms. Allocated memory is still 328.2MB. Free memory was 267.8MB in the beginning and 257.5MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.33ms. Allocated memory is still 328.2MB. Free memory was 257.5MB in the beginning and 255.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 337.92ms. Allocated memory is still 328.2MB. Free memory was 255.9MB in the beginning and 242.9MB in the end (delta: 13.0MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 19163.33ms. Allocated memory was 328.2MB in the beginning and 394.3MB in the end (delta: 66.1MB). Free memory was 242.3MB in the beginning and 140.0MB in the end (delta: 102.3MB). Peak memory consumption was 169.2MB. 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 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.1s, OverallIterations: 5, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55 mSDsluCounter, 366 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 272 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 413 IncrementalHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 94 mSDtfsCounter, 413 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 331 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 22 PreInvPairs, 29 NumberOfFragments, 222 HoareAnnotationTreeSize, 22 FomulaSimplifications, 135 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1095 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 256 ConstructedInterpolants, 1 QuantifiedInterpolants, 1448 SizeOfPredicates, 22 NumberOfNonLiveVariables, 537 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 176/194 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((0 <= y && z + y * x == b * a) && b <= 2) && 0 <= a) && y <= 0) && a <= 2) && 1 <= b) || ((((((z == 0 && y == b / 2) && !(y % 2 == 0)) && a * 2 == x) && 0 <= a) && a <= 2) && (-1 + b) / 2 == 0)) || ((((((z == 0 && b <= 2) && b == y) && 0 <= a) && a <= 2) && 1 <= b) && a == x) RESULT: Ultimate proved your program to be correct! [2023-04-01 11:32:28,347 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...