/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/ps4-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:33:51,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:33:51,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:33:51,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:33:51,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:33:51,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:33:51,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:33:51,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:33:51,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:33:51,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:33:51,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:33:51,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:33:51,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:33:51,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:33:51,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:33:51,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:33:51,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:33:51,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:33:51,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:33:51,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:33:51,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:33:51,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:33:51,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:33:51,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:33:51,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:33:51,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:33:51,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:33:51,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:33:51,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:33:51,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:33:51,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:33:51,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:33:51,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:33:51,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:33:51,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:33:51,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:33:51,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:33:51,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:33:51,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:33:51,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:33:51,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:33:51,784 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 11:33:51,817 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:33:51,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:33:51,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:33:51,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:33:51,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:33:51,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:33:51,819 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:33:51,819 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:33:51,819 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:33:51,820 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:33:51,820 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:33:51,821 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:33:51,821 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:33:51,821 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:33:51,821 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:33:51,821 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:33:51,821 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:33:51,821 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:33:51,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:33:51,822 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:33:51,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:33:51,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:33:51,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:33:51,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:33:51,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:33:51,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:33:51,823 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:33:51,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:33:51,823 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:33:51,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:33:51,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:33:51,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:33:51,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:33:51,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:33:51,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:33:51,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:33:51,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:33:51,825 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:33:51,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:33:51,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:33:51,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:33:51,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:33:52,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:33:52,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:33:52,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:33:52,076 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:33:52,077 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:33:52,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-04-01 11:33:53,175 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:33:53,347 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:33:53,348 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-04-01 11:33:53,352 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7a3dc11/4a2af804913f4dc38448e30fbb5aa72d/FLAG610b09dd9 [2023-04-01 11:33:53,367 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7a3dc11/4a2af804913f4dc38448e30fbb5aa72d [2023-04-01 11:33:53,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:33:53,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:33:53,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:33:53,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:33:53,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:33:53,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217a4d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53, skipping insertion in model container [2023-04-01 11:33:53,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:33:53,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:33:53,514 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/ps4-ll_valuebound100.c[458,471] [2023-04-01 11:33:53,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:33:53,538 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:33:53,550 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/ps4-ll_valuebound100.c[458,471] [2023-04-01 11:33:53,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:33:53,565 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:33:53,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53 WrapperNode [2023-04-01 11:33:53,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:33:53,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:33:53,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:33:53,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:33:53,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,590 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:33:53,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:33:53,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:33:53,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:33:53,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (1/1) ... [2023-04-01 11:33:53,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:33:53,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:33:53,632 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 11:33:53,637 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 11:33:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:33:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:33:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:33:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:33:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:33:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:33:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:33:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:33:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:33:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:33:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-01 11:33:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:33:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:33:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:33:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:33:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:33:53,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:33:53,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:33:53,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:33:53,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:33:53,719 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:33:53,721 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:33:53,905 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:33:53,941 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:33:53,941 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:33:53,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:33:53 BoogieIcfgContainer [2023-04-01 11:33:53,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:33:53,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:33:53,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:33:53,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:33:53,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:33:53" (1/3) ... [2023-04-01 11:33:53,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48508325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:33:53, skipping insertion in model container [2023-04-01 11:33:53,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:33:53" (2/3) ... [2023-04-01 11:33:53,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48508325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:33:53, skipping insertion in model container [2023-04-01 11:33:53,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:33:53" (3/3) ... [2023-04-01 11:33:53,950 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2023-04-01 11:33:53,963 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:33:53,964 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:33:54,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:33:54,005 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;@6e08687a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:33:54,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:33:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 11:33:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 11:33:54,015 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:33:54,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:33:54,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:33:54,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:33:54,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1070716929, now seen corresponding path program 1 times [2023-04-01 11:33:54,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:33:54,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360528549] [2023-04-01 11:33:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:33:54,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:33:54,141 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:33:54,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89149832] [2023-04-01 11:33:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:33:54,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:33:54,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:33:54,149 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 11:33:54,188 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 11:33:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:33:54,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 11:33:54,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:33:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:33:54,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:33:54,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:33:54,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360528549] [2023-04-01 11:33:54,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:33:54,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89149832] [2023-04-01 11:33:54,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89149832] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:33:54,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:33:54,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:33:54,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703850248] [2023-04-01 11:33:54,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:33:54,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:33:54,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:33:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:33:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:33:54,380 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:33:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:33:54,480 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-04-01 11:33:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:33:54,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-01 11:33:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:33:54,488 INFO L225 Difference]: With dead ends: 50 [2023-04-01 11:33:54,488 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 11:33:54,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:33:54,494 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:33:54,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:33:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 11:33:54,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 11:33:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 11:33:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 11:33:54,537 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2023-04-01 11:33:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:33:54,538 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 11:33:54,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:33:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 11:33:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:33:54,542 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:33:54,543 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:33:54,549 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 11:33:54,749 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 11:33:54,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:33:54,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:33:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1540599750, now seen corresponding path program 1 times [2023-04-01 11:33:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:33:54,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913933931] [2023-04-01 11:33:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:33:54,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:33:54,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:33:54,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046980550] [2023-04-01 11:33:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:33:54,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:33:54,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:33:54,781 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 11:33:54,784 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 11:33:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:33:54,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 11:33:54,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:33:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:33:54,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:33:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:33:55,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:33:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913933931] [2023-04-01 11:33:55,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:33:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046980550] [2023-04-01 11:33:55,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046980550] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:33:55,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139931768] [2023-04-01 11:33:55,081 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:33:55,081 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:33:55,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:33:55,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:33:55,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:33:55,208 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:33:56,071 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 73 for LOIs [2023-04-01 11:33:56,325 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-04-01 11:33:56,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:33:56,351 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:33:57,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~c~0_BEFORE_CALL_9 Int) (v_main_~k~0_BEFORE_CALL_9 Int) (v_main_~y~0_BEFORE_CALL_13 Int) (v_main_~x~0_BEFORE_CALL_13 Int)) (and (not (= (* v_main_~x~0_BEFORE_CALL_13 4) (+ (* (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13) 2) (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13) (* v_main_~y~0_BEFORE_CALL_13 v_main_~y~0_BEFORE_CALL_13)))) (or (and (= v_main_~c~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_13) (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (= 2 (select |#length| 1)) (not (= v_main_~c~0_BEFORE_CALL_9 (+ v_main_~k~0_BEFORE_CALL_9 1))) (= (select |#valid| 3) 1) (= 9 (select |#length| 2)) (not (= |#length| |#valid|)) (not (= |#StackHeapBarrier| 0)) (= (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)) (and (= (select |#length| 3) 12) (not (= |#length| (select |#memory_int| 1))) (= 2 (select |#length| 1)) (= v_main_~y~0_BEFORE_CALL_13 0) (= v_main_~c~0_BEFORE_CALL_9 0) (= (select |#valid| 3) 1) (= 9 (select |#length| 2)) (not (= |#length| |#valid|)) (not (= |#StackHeapBarrier| 0)) (= v_main_~x~0_BEFORE_CALL_13 0) (= (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 11:33:57,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:33:57,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:33:57,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-04-01 11:33:57,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698880454] [2023-04-01 11:33:57,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:33:57,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:33:57,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:33:57,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:33:57,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-04-01 11:33:57,493 INFO L87 Difference]: Start difference. First operand 27 states and 29 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 11:33:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:33:57,627 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-04-01 11:33:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:33:57,628 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-04-01 11:33:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:33:57,628 INFO L225 Difference]: With dead ends: 38 [2023-04-01 11:33:57,629 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 11:33:57,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:33:57,630 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:33:57,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 107 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:33:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 11:33:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-04-01 11:33:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 11:33:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-04-01 11:33:57,636 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 21 [2023-04-01 11:33:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:33:57,638 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-04-01 11:33:57,639 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 11:33:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-04-01 11:33:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 11:33:57,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:33:57,642 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:33:57,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 11:33:57,847 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 11:33:57,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:33:57,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:33:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1414863620, now seen corresponding path program 1 times [2023-04-01 11:33:57,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:33:57,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407725041] [2023-04-01 11:33:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:33:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:33:57,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:33:57,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290502952] [2023-04-01 11:33:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:33:57,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:33:57,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:33:57,865 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 11:33:57,878 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 11:33:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:33:57,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 11:33:57,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:33:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:33:57,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:34:26,282 WARN L861 $PredicateComparison]: unable to prove that (or (forall ((v_main_~k~0_BEFORE_CALL_13 Int) (v_main_~y~0_BEFORE_CALL_17 Int)) (or (= (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17) (* v_main_~y~0_BEFORE_CALL_17 v_main_~k~0_BEFORE_CALL_13)) (= (mod (+ (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 3) (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 3) (* 2 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2023-04-01 11:34:44,339 WARN L861 $PredicateComparison]: unable to prove that (or (forall ((v_main_~k~0_BEFORE_CALL_13 Int) (v_main_~y~0_BEFORE_CALL_17 Int)) (or (= (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17) (* v_main_~y~0_BEFORE_CALL_17 v_main_~k~0_BEFORE_CALL_13)) (= (mod (+ (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 3) (* v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 3) (* 2 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17 v_main_~y~0_BEFORE_CALL_17)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-04-01 11:34:50,383 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 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 11:34:52,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:34:52,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407725041] [2023-04-01 11:34:52,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:34:52,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290502952] [2023-04-01 11:34:52,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290502952] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:34:52,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887967375] [2023-04-01 11:34:52,413 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:34:52,413 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:34:52,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:34:52,413 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:34:52,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:34:52,470 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:34:52,981 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:34:52,984 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 63 for LOIs [2023-04-01 11:34:52,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:34:52,998 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:34:53,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '567#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:34:53,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:34:53,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:34:53,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-01 11:34:53,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001793538] [2023-04-01 11:34:53,690 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 11:34:53,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:34:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:34:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:34:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=479, Unknown=7, NotChecked=138, Total=702 [2023-04-01 11:34:53,692 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 11:34:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:34:53,790 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-04-01 11:34:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:34:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-04-01 11:34:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:34:53,792 INFO L225 Difference]: With dead ends: 36 [2023-04-01 11:34:53,792 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 11:34:53,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=93, Invalid=562, Unknown=7, NotChecked=150, Total=812 [2023-04-01 11:34:53,794 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:34:53,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 82 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:34:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 11:34:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 11:34:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 11:34:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-04-01 11:34:53,800 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2023-04-01 11:34:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:34:53,800 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-04-01 11:34:53,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 11:34:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-04-01 11:34:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 11:34:53,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:34:53,802 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:34:53,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:34:54,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:34:54,007 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:34:54,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:34:54,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1826650261, now seen corresponding path program 2 times [2023-04-01 11:34:54,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:34:54,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787451512] [2023-04-01 11:34:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:34:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:34:54,019 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:34:54,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741637385] [2023-04-01 11:34:54,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:34:54,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:34:54,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:34:54,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:34:54,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:34:54,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:34:54,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:34:54,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 11:34:54,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:34:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:34:54,170 INFO L327 TraceCheckSpWp]: Computing backward predicates...