/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/ps5-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:35:24,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:35:24,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:35:24,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:35:24,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:35:24,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:35:24,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:35:24,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:35:24,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:35:24,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:35:24,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:35:24,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:35:24,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:35:24,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:35:24,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:35:24,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:35:24,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:35:24,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:35:24,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:35:24,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:35:24,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:35:24,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:35:24,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:35:24,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:35:24,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:35:24,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:35:24,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:35:24,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:35:24,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:35:24,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:35:24,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:35:24,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:35:24,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:35:24,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:35:24,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:35:24,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:35:24,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:35:24,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:35:24,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:35:24,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:35:24,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:35:24,848 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 11:35:24,869 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:35:24,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:35:24,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:35:24,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:35:24,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:35:24,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:35:24,871 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:35:24,871 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:35:24,871 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:35:24,871 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:35:24,871 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:35:24,872 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:35:24,872 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:35:24,872 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:35:24,872 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:35:24,872 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:35:24,872 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:35:24,873 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:35:24,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:35:24,873 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:35:24,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:35:24,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:35:24,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:35:24,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:35:24,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:35:24,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:35:24,875 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:35:24,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:35:24,875 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:35:24,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:35:24,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:35:24,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:35:24,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:35:24,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:35:24,876 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:35:24,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:35:24,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:35:24,876 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:35:24,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:35:24,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:35:24,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:35:24,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:35:25,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:35:25,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:35:25,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:35:25,121 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:35:25,122 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:35:25,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c [2023-04-01 11:35:26,206 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:35:26,399 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:35:26,399 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c [2023-04-01 11:35:26,407 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ee30da5/c542cafb95714c7ca95aaa858ce7d5bd/FLAG60a8fee99 [2023-04-01 11:35:26,421 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ee30da5/c542cafb95714c7ca95aaa858ce7d5bd [2023-04-01 11:35:26,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:35:26,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:35:26,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:35:26,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:35:26,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:35:26,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4855197a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26, skipping insertion in model container [2023-04-01 11:35:26,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:35:26,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:35:26,553 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/ps5-ll_valuebound50.c[458,471] [2023-04-01 11:35:26,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:35:26,573 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:35:26,581 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/ps5-ll_valuebound50.c[458,471] [2023-04-01 11:35:26,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:35:26,598 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:35:26,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26 WrapperNode [2023-04-01 11:35:26,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:35:26,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:35:26,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:35:26,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:35:26,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,635 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:35:26,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:35:26,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:35:26,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:35:26,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (1/1) ... [2023-04-01 11:35:26,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:35:26,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:35:26,662 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 11:35:26,668 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 11:35:26,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:35:26,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:35:26,692 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:35:26,697 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:35:26,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:35:26,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:35:26,697 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:35:26,697 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:35:26,697 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:35:26,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:35:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-01 11:35:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:35:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:35:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:35:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:35:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:35:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:35:26,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:35:26,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:35:26,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:35:26,750 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:35:26,752 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:35:26,848 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:35:26,877 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:35:26,877 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:35:26,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:35:26 BoogieIcfgContainer [2023-04-01 11:35:26,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:35:26,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:35:26,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:35:26,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:35:26,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:35:26" (1/3) ... [2023-04-01 11:35:26,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e726fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:35:26, skipping insertion in model container [2023-04-01 11:35:26,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:35:26" (2/3) ... [2023-04-01 11:35:26,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e726fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:35:26, skipping insertion in model container [2023-04-01 11:35:26,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:35:26" (3/3) ... [2023-04-01 11:35:26,886 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound50.c [2023-04-01 11:35:26,904 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:35:26,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:35:26,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:35:26,965 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;@2260ff1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:35:26,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:35:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 11:35:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 11:35:26,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:35:26,974 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:35:26,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:35:26,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:35:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash 395619074, now seen corresponding path program 1 times [2023-04-01 11:35:26,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:35:26,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845446235] [2023-04-01 11:35:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:35:26,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:35:27,055 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:35:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767340542] [2023-04-01 11:35:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:35:27,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:35:27,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:35:27,061 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 11:35:27,065 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 11:35:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:35:27,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 11:35:27,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:35:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:35:27,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:35:27,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:35:27,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845446235] [2023-04-01 11:35:27,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:35:27,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767340542] [2023-04-01 11:35:27,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767340542] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:35:27,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:35:27,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 11:35:27,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263717456] [2023-04-01 11:35:27,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:35:27,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 11:35:27,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:35:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 11:35:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:35:27,353 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:35:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:35:27,460 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2023-04-01 11:35:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:35:27,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-04-01 11:35:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:35:27,467 INFO L225 Difference]: With dead ends: 51 [2023-04-01 11:35:27,468 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 11:35:27,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 11:35:27,473 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:35:27,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:35:27,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 11:35:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 11:35:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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 11:35:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-04-01 11:35:27,506 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2023-04-01 11:35:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:35:27,507 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-04-01 11:35:27,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:35:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-04-01 11:35:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 11:35:27,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:35:27,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:35:27,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:35:27,709 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 11:35:27,709 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:35:27,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:35:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash 398349892, now seen corresponding path program 1 times [2023-04-01 11:35:27,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:35:27,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480339034] [2023-04-01 11:35:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:35:27,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:35:27,732 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:35:27,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127825260] [2023-04-01 11:35:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:35:27,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:35:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:35:27,740 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 11:35:27,742 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 11:35:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:35:27,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 11:35:27,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:35:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:35:27,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:35:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:35:27,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:35:27,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480339034] [2023-04-01 11:35:27,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:35:27,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127825260] [2023-04-01 11:35:27,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127825260] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:35:27,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920128410] [2023-04-01 11:35:28,039 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:35:28,040 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:35:28,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:35:28,047 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:35:28,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:35:28,155 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:35:30,034 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 79 for LOIs [2023-04-01 11:35:30,208 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2023-04-01 11:35:30,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:35:30,217 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:35:31,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '352#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~c~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_15 Int) (v_main_~k~0_BEFORE_CALL_13 Int) (v_main_~x~0_BEFORE_CALL_15 Int)) (and (not (= (+ (* 10 (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15)) (* 6 (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15)) (* 15 (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15))) (+ (* 30 v_main_~x~0_BEFORE_CALL_15) v_main_~y~0_BEFORE_CALL_15))) (or (and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (= v_main_~c~0_BEFORE_CALL_11 0) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= 9 (select |#length| 2)) (not (= |#length| |#valid|)) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= v_main_~y~0_BEFORE_CALL_15 0) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= v_main_~x~0_BEFORE_CALL_15 0) (= |#NULL.base| 0)) (and (= v_main_~y~0_BEFORE_CALL_15 v_main_~c~0_BEFORE_CALL_11) (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= 9 (select |#length| 2)) (not (= |#length| |#valid|)) (not (= |#StackHeapBarrier| 0)) (not (= (+ v_main_~k~0_BEFORE_CALL_13 1) v_main_~c~0_BEFORE_CALL_11)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= |#valid| (select |#memory_int| 1))) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))))))' at error location [2023-04-01 11:35:31,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:35:31,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:35:31,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-04-01 11:35:31,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850623433] [2023-04-01 11:35:31,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:35:31,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:35:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:35:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:35:31,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-04-01 11:35:31,100 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:35:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:35:31,216 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-04-01 11:35:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:35:31,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2023-04-01 11:35:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:35:31,218 INFO L225 Difference]: With dead ends: 39 [2023-04-01 11:35:31,218 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 11:35:31,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-04-01 11:35:31,220 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:35:31,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 90 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:35:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 11:35:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-04-01 11:35:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 8 states have call successors, (8), 6 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 11:35:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-01 11:35:31,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2023-04-01 11:35:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:35:31,228 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-01 11:35:31,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:35:31,229 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-01 11:35:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 11:35:31,230 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:35:31,230 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:35:31,238 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 11:35:31,435 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 11:35:31,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:35:31,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:35:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2024645172, now seen corresponding path program 1 times [2023-04-01 11:35:31,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:35:31,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149885856] [2023-04-01 11:35:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:35:31,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:35:31,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:35:31,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821413542] [2023-04-01 11:35:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:35:31,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:35:31,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:35:31,453 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 11:35:31,456 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 11:35:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:35:31,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 11:35:31,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:35:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:35:31,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:35:35,678 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (= (* c_main_~y~0 c_main_~k~0) (* c_main_~y~0 c_main_~y~0))) is different from false [2023-04-01 11:35:55,762 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_19 Int) (v_main_~y~0_BEFORE_CALL_20 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 6) (* v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 10) (* 29 v_main_~y~0_BEFORE_CALL_20) (* v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 15)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20) (* v_main_~y~0_BEFORE_CALL_20 v_main_~k~0_BEFORE_CALL_19))))) is different from true [2023-04-01 11:36:13,834 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_19 Int) (v_main_~y~0_BEFORE_CALL_20 Int)) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 6) (* v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 10) (* 29 v_main_~y~0_BEFORE_CALL_20) (* v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20 15)) 30) 0) (= (* v_main_~y~0_BEFORE_CALL_20 v_main_~y~0_BEFORE_CALL_20) (* v_main_~y~0_BEFORE_CALL_20 v_main_~k~0_BEFORE_CALL_19)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-04-01 11:36:35,710 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 15 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 29 c_main_~y~0) (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 30) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false [2023-04-01 11:36:37,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:36:37,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149885856] [2023-04-01 11:36:37,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:36:37,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821413542] [2023-04-01 11:36:37,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821413542] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:36:37,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095823800] [2023-04-01 11:36:37,745 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 11:36:37,745 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:36:37,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:36:37,745 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:36:37,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:36:37,792 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs