/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/lcm2_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:26:06,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:26:06,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:26:06,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:26:06,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:26:06,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:26:06,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:26:06,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:26:06,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:26:06,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:26:06,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:26:06,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:26:06,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:26:06,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:26:06,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:26:06,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:26:06,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:26:06,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:26:06,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:26:06,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:26:06,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:26:06,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:26:06,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:26:06,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:26:06,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:26:06,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:26:06,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:26:06,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:26:06,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:26:06,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:26:06,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:26:06,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:26:06,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:26:06,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:26:06,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:26:06,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:26:06,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:26:06,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:26:06,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:26:06,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:26:06,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:26:06,657 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 05:26:06,685 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:26:06,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:26:06,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:26:06,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:26:06,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:26:06,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:26:06,687 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:26:06,687 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:26:06,687 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:26:06,687 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:26:06,688 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:26:06,688 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:26:06,688 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:26:06,689 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:26:06,689 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:26:06,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:26:06,689 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:26:06,689 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:26:06,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:26:06,690 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:26:06,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:26:06,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:26:06,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:26:06,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:26:06,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:26:06,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:26:06,691 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:26:06,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:26:06,691 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:26:06,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:26:06,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:26:06,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:26:06,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:26:06,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:26:06,692 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:26:06,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:26:06,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:26:06,693 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:26:06,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:26:06,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:26:06,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:26:06,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:26:06,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:26:06,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:26:06,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:26:06,968 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:26:06,969 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:26:06,970 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound10.c [2023-04-01 05:26:08,192 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:26:08,385 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:26:08,385 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/lcm2_valuebound10.c [2023-04-01 05:26:08,390 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b3e8b92/26591b7c20724721b5de34ddf59de98d/FLAGdd78c5169 [2023-04-01 05:26:08,400 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b3e8b92/26591b7c20724721b5de34ddf59de98d [2023-04-01 05:26:08,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:26:08,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:26:08,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:26:08,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:26:08,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:26:08,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e099e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08, skipping insertion in model container [2023-04-01 05:26:08,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:26:08,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:26:08,586 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/lcm2_valuebound10.c[537,550] [2023-04-01 05:26:08,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:26:08,617 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:26:08,632 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/lcm2_valuebound10.c[537,550] [2023-04-01 05:26:08,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:26:08,660 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:26:08,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08 WrapperNode [2023-04-01 05:26:08,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:26:08,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:26:08,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:26:08,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:26:08,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,700 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:26:08,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:26:08,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:26:08,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:26:08,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (1/1) ... [2023-04-01 05:26:08,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:26:08,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:26:08,734 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 05:26:08,755 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 05:26:08,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:26:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:26:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:26:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:26:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:26:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:26:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:26:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:26:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:26:08,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 05:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:26:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:26:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:26:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:26:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:26:08,835 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:26:08,837 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:26:09,069 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:26:09,112 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:26:09,113 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:26:09,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:26:09 BoogieIcfgContainer [2023-04-01 05:26:09,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:26:09,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:26:09,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:26:09,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:26:09,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:26:08" (1/3) ... [2023-04-01 05:26:09,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c38d82a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:26:09, skipping insertion in model container [2023-04-01 05:26:09,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:26:08" (2/3) ... [2023-04-01 05:26:09,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c38d82a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:26:09, skipping insertion in model container [2023-04-01 05:26:09,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:26:09" (3/3) ... [2023-04-01 05:26:09,126 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound10.c [2023-04-01 05:26:09,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:26:09,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:26:09,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:26:09,195 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;@5155e65a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:26:09,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:26:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 05:26:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 05:26:09,204 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:26:09,204 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:26:09,205 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:26:09,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:26:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1384592215, now seen corresponding path program 1 times [2023-04-01 05:26:09,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:26:09,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390409861] [2023-04-01 05:26:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:26:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:26:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:26:09,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:26:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390409861] [2023-04-01 05:26:09,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 05:26:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419576810] [2023-04-01 05:26:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:26:09,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:26:09,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:26:09,386 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 05:26:09,388 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 05:26:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:26:09,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 05:26:09,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:26:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 05:26:09,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:26:09,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419576810] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:26:09,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:26:09,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:26:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963184387] [2023-04-01 05:26:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:26:09,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:26:09,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:26:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:26:09,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:26:09,525 INFO L87 Difference]: Start difference. First operand has 29 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 05:26:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:26:09,550 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2023-04-01 05:26:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:26:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 30 [2023-04-01 05:26:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:26:09,558 INFO L225 Difference]: With dead ends: 43 [2023-04-01 05:26:09,558 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 05:26:09,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:26:09,564 INFO L413 NwaCegarLoop]: 31 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, 31 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 05:26:09,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:26:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 05:26:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 05:26:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 05:26:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-04-01 05:26:09,598 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2023-04-01 05:26:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:26:09,599 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-04-01 05:26:09,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 05:26:09,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-04-01 05:26:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 05:26:09,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:26:09,601 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:26:09,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 05:26:09,807 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 05:26:09,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:26:09,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:26:09,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1326350810, now seen corresponding path program 1 times [2023-04-01 05:26:09,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:26:09,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174082150] [2023-04-01 05:26:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:26:09,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:26:09,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:26:09,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886321848] [2023-04-01 05:26:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:26:09,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:26:09,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:26:09,865 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 05:26:09,868 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 05:26:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:26:09,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 05:26:10,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:26:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 05:26:10,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:26:10,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:26:10,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174082150] [2023-04-01 05:26:10,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:26:10,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886321848] [2023-04-01 05:26:10,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886321848] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:26:10,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:26:10,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 05:26:10,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638054221] [2023-04-01 05:26:10,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:26:10,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 05:26:10,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:26:10,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 05:26:10,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:26:10,192 INFO L87 Difference]: Start difference. First operand 25 states and 31 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 05:26:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:26:10,370 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-04-01 05:26:10,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 05:26:10,371 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 30 [2023-04-01 05:26:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:26:10,372 INFO L225 Difference]: With dead ends: 36 [2023-04-01 05:26:10,372 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 05:26:10,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 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 05:26:10,373 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:26:10,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:26:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 05:26:10,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-04-01 05:26:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 05:26:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-04-01 05:26:10,386 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 30 [2023-04-01 05:26:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:26:10,386 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-04-01 05:26:10,387 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-01 05:26:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-04-01 05:26:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 05:26:10,388 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:26:10,388 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:26:10,397 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 05:26:10,594 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 05:26:10,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:26:10,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:26:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash 857581057, now seen corresponding path program 1 times [2023-04-01 05:26:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:26:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650222667] [2023-04-01 05:26:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:26:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:26:10,626 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:26:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986036288] [2023-04-01 05:26:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:26:10,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:26:10,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:26:10,630 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 05:26:10,632 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 05:26:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2023-04-01 05:26:10,732 WARN L124 FreeRefinementEngine]: Strategy SIFA_TAIPAN was unsuccessful and could not determine trace feasibility [2023-04-01 05:26:10,732 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2023-04-01 05:26:10,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 05:26:10,748 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 05:26:10,940 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 05:26:10,943 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-04-01 05:26:10,945 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 05:26:10,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 05:26:10 BoogieIcfgContainer [2023-04-01 05:26:10,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 05:26:10,956 INFO L158 Benchmark]: Toolchain (without parser) took 2553.46ms. Allocated memory is still 315.6MB. Free memory was 270.7MB in the beginning and 175.8MB in the end (delta: 94.9MB). Peak memory consumption was 95.4MB. Max. memory is 8.0GB. [2023-04-01 05:26:10,957 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 195.0MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 05:26:10,957 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.82ms. Allocated memory is still 315.6MB. Free memory was 270.2MB in the beginning and 259.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 05:26:10,957 INFO L158 Benchmark]: Boogie Preprocessor took 42.08ms. Allocated memory is still 315.6MB. Free memory was 259.7MB in the beginning and 258.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 05:26:10,958 INFO L158 Benchmark]: RCFGBuilder took 411.07ms. Allocated memory is still 315.6MB. Free memory was 258.1MB in the beginning and 244.0MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-04-01 05:26:10,958 INFO L158 Benchmark]: TraceAbstraction took 1838.77ms. Allocated memory is still 315.6MB. Free memory was 242.9MB in the beginning and 175.8MB in the end (delta: 67.1MB). Peak memory consumption was 67.1MB. Max. memory is 8.0GB. [2023-04-01 05:26:10,963 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 195.0MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 256.82ms. Allocated memory is still 315.6MB. Free memory was 270.2MB in the beginning and 259.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.08ms. Allocated memory is still 315.6MB. Free memory was 259.7MB in the beginning and 258.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 411.07ms. Allocated memory is still 315.6MB. Free memory was 258.1MB in the beginning and 244.0MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 1838.77ms. Allocated memory is still 315.6MB. Free memory was 242.9MB in the beginning and 175.8MB in the end (delta: 67.1MB). Peak memory consumption was 67.1MB. 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 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] unsigned a, b; [L21] unsigned x, y, u, v; [L22] a = __VERIFIER_nondet_uint() [L23] CALL assume_abort_if_not(a>=0 && a<=10) [L9] COND TRUE !cond [L23] RET assume_abort_if_not(a>=0 && a<=10) [L24] b = __VERIFIER_nondet_uint() [L25] CALL assume_abort_if_not(b>=0 && b<=10) [L9] COND TRUE !cond [L25] RET assume_abort_if_not(b>=0 && b<=10) [L26] CALL assume_abort_if_not(a >= 1) [L9] COND TRUE !cond [L26] RET assume_abort_if_not(a >= 1) [L27] CALL assume_abort_if_not(b >= 1) [L9] COND TRUE !cond [L27] RET assume_abort_if_not(b >= 1) [L29] CALL assume_abort_if_not(a <= 65535) [L9] COND TRUE !cond [L29] RET assume_abort_if_not(a <= 65535) [L30] CALL assume_abort_if_not(b <= 65535) [L9] COND TRUE !cond [L30] RET assume_abort_if_not(b <= 65535) [L32] x = a [L33] y = b [L34] u = b [L35] v = a [L37] COND TRUE 1 [L38] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(x*u + y*v == 2*a*b) [L40] COND FALSE !(!(x != y)) [L43] COND TRUE x > y [L44] x = x - y [L45] v = v + u [L37] COND TRUE 1 [L38] CALL __VERIFIER_assert(x*u + y*v == 2*a*b) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 93 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 45 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 98 IncrementalHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 48 mSDtfsCounter, 98 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, InterpolantAutomatonStates: 9, 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, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 103 SizeOfPredicates, 9 NumberOfNonLiveVariables, 244 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 60/60 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 could not prove your program: unable to determine feasibility of some traces [2023-04-01 05:26:10,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...