/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/hard-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:25:31,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:25:31,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:25:31,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:25:31,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:25:31,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:25:31,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:25:31,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:25:31,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:25:31,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:25:31,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:25:31,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:25:31,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:25:31,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:25:31,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:25:31,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:25:31,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:25:31,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:25:31,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:25:31,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:25:31,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:25:31,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:25:31,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:25:31,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:25:31,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 11:25:31,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:25:31,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:25:31,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:25:31,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:25:31,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:25:31,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:25:31,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:25:31,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:25:31,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:25:31,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:25:31,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:25:31,699 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 11:25:31,740 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:25:31,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:25:31,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:25:31,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:25:31,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:25:31,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:25:31,741 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:25:31,742 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:25:31,742 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:25:31,742 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:25:31,742 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:25:31,743 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:25:31,743 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:25:31,743 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:25:31,743 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:25:31,743 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:25:31,743 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:25:31,743 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:25:31,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:25:31,744 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:25:31,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:25:31,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:25:31,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:25:31,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:25:31,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:25:31,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:25:31,745 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:25:31,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:25:31,745 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:25:31,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:25:31,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:25:31,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:25:31,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:25:31,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:25:31,746 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:25:31,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:25:31,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:25:31,747 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:25:31,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:25:31,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:25:31,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:25:31,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:25:31,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:25:32,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:25:32,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:25:32,006 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:25:32,008 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:25:32,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2023-04-01 11:25:33,107 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:25:33,315 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:25:33,316 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2023-04-01 11:25:33,325 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa4667956/55fe2604510544e490a282394fadf3c2/FLAGcce09d308 [2023-04-01 11:25:33,341 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa4667956/55fe2604510544e490a282394fadf3c2 [2023-04-01 11:25:33,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:25:33,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:25:33,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:25:33,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:25:33,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:25:33,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680b7148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33, skipping insertion in model container [2023-04-01 11:25:33,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:25:33,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:25:33,532 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/hard-ll_valuebound100.c[538,551] [2023-04-01 11:25:33,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:25:33,567 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:25:33,582 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/hard-ll_valuebound100.c[538,551] [2023-04-01 11:25:33,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:25:33,604 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:25:33,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33 WrapperNode [2023-04-01 11:25:33,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:25:33,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:25:33,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:25:33,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:25:33,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,645 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:25:33,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:25:33,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:25:33,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:25:33,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (1/1) ... [2023-04-01 11:25:33,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:25:33,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:33,682 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 11:25:33,686 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 11:25:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:25:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:25:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:25:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:25:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:25:33,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:25:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:25:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:25:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:25:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:25:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:25:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:25:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:25:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:25:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:25:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:25:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:25:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:25:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:25:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:25:33,776 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:25:33,777 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:25:33,938 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:25:33,972 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:25:33,972 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:25:33,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:25:33 BoogieIcfgContainer [2023-04-01 11:25:33,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:25:33,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:25:33,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:25:33,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:25:33,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:25:33" (1/3) ... [2023-04-01 11:25:33,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a32dba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:25:33, skipping insertion in model container [2023-04-01 11:25:33,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:25:33" (2/3) ... [2023-04-01 11:25:33,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a32dba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:25:33, skipping insertion in model container [2023-04-01 11:25:33,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:25:33" (3/3) ... [2023-04-01 11:25:33,991 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2023-04-01 11:25:34,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:25:34,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:25:34,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:25:34,058 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;@77c54708, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:25:34,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:25:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 11:25:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:25:34,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:34,072 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:34,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:34,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash -91855496, now seen corresponding path program 1 times [2023-04-01 11:25:34,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:34,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631957758] [2023-04-01 11:25:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:34,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:25:34,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631957758] [2023-04-01 11:25:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631957758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:34,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:34,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:25:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282395483] [2023-04-01 11:25:34,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:34,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:25:34,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:34,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:25:34,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:34,479 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:25:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:34,613 INFO L93 Difference]: Finished difference Result 66 states and 105 transitions. [2023-04-01 11:25:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:25:34,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-04-01 11:25:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:34,623 INFO L225 Difference]: With dead ends: 66 [2023-04-01 11:25:34,624 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 11:25:34,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 11:25:34,631 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:34,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 119 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:25:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 11:25:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2023-04-01 11:25:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:25:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-04-01 11:25:34,704 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2023-04-01 11:25:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:34,705 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-04-01 11:25:34,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:25:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-04-01 11:25:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 11:25:34,707 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:34,708 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:34,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:25:34,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:34,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash -445599122, now seen corresponding path program 1 times [2023-04-01 11:25:34,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:34,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123168474] [2023-04-01 11:25:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 11:25:34,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:34,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123168474] [2023-04-01 11:25:34,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123168474] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:34,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:25:34,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:25:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366774611] [2023-04-01 11:25:34,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:34,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:25:34,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:34,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:25:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:25:34,884 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:25:34,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:34,957 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-04-01 11:25:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:25:34,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-04-01 11:25:34,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:34,958 INFO L225 Difference]: With dead ends: 45 [2023-04-01 11:25:34,959 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 11:25:34,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 11:25:34,960 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:34,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:25:34,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 11:25:34,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2023-04-01 11:25:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:25:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-04-01 11:25:34,969 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2023-04-01 11:25:34,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:34,970 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-04-01 11:25:34,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 11:25:34,970 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-04-01 11:25:34,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 11:25:34,971 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:34,971 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:34,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:25:34,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:34,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:34,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1862588680, now seen corresponding path program 1 times [2023-04-01 11:25:34,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:34,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348127832] [2023-04-01 11:25:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:34,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:35,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:35,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528421579] [2023-04-01 11:25:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:35,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:35,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:35,026 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 11:25:35,038 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 11:25:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:35,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 11:25:35,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 11:25:35,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 11:25:35,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:35,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348127832] [2023-04-01 11:25:35,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:35,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528421579] [2023-04-01 11:25:35,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528421579] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:35,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835082016] [2023-04-01 11:25:35,530 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 11:25:35,530 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:35,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:35,538 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:35,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:35,675 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:25:36,538 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 11:25:36,568 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:25:36,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:25:36,585 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:37,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [835082016] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:25:37,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:37,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 7] total 20 [2023-04-01 11:25:37,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263076664] [2023-04-01 11:25:37,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:25:37,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 11:25:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:37,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 11:25:37,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-04-01 11:25:37,134 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 11:25:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:37,822 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2023-04-01 11:25:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:25:37,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2023-04-01 11:25:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:37,824 INFO L225 Difference]: With dead ends: 72 [2023-04-01 11:25:37,824 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 11:25:37,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:25:37,826 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:37,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 4 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:25:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 11:25:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 11:25:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 11:25:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-04-01 11:25:37,855 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2023-04-01 11:25:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:37,856 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-04-01 11:25:37,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 11:25:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-04-01 11:25:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 11:25:37,859 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:37,859 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:37,872 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 11:25:38,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:38,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:38,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:38,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1036351980, now seen corresponding path program 1 times [2023-04-01 11:25:38,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:38,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505484373] [2023-04-01 11:25:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:38,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:38,102 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:38,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980767149] [2023-04-01 11:25:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:38,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:38,106 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 11:25:38,109 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 11:25:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:38,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 11:25:38,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 11:25:38,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 11:25:38,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:38,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505484373] [2023-04-01 11:25:38,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:38,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980767149] [2023-04-01 11:25:38,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980767149] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:38,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480375460] [2023-04-01 11:25:38,552 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 11:25:38,553 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:38,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:38,553 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:38,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:38,585 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:25:40,008 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:25:40,011 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:25:40,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:25:40,020 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:40,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1035#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:25:40,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:40,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:40,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-04-01 11:25:40,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660910729] [2023-04-01 11:25:40,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:40,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 11:25:40,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 11:25:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:25:40,955 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-04-01 11:25:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:41,364 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2023-04-01 11:25:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:25:41,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 48 [2023-04-01 11:25:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:41,370 INFO L225 Difference]: With dead ends: 86 [2023-04-01 11:25:41,370 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 11:25:41,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-04-01 11:25:41,371 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:41,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 132 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:25:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 11:25:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-04-01 11:25:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 11:25:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2023-04-01 11:25:41,406 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 48 [2023-04-01 11:25:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:41,406 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2023-04-01 11:25:41,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-04-01 11:25:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2023-04-01 11:25:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 11:25:41,408 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:41,408 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:41,417 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 11:25:41,614 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,SelfDestructingSolverStorable3 [2023-04-01 11:25:41,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:41,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:41,615 INFO L85 PathProgramCache]: Analyzing trace with hash -860679289, now seen corresponding path program 1 times [2023-04-01 11:25:41,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:41,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926783105] [2023-04-01 11:25:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:41,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:41,630 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:41,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848373564] [2023-04-01 11:25:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:41,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:41,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:41,644 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 11:25:41,646 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 11:25:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:41,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 11:25:41,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-01 11:25:41,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 11:25:42,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:42,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926783105] [2023-04-01 11:25:42,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:42,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848373564] [2023-04-01 11:25:42,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848373564] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:42,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [919061921] [2023-04-01 11:25:42,528 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-04-01 11:25:42,528 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:42,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:42,528 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:42,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:42,556 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:25:43,793 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:25:43,797 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:25:43,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:25:43,805 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:45,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1638#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:25:45,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:45,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:45,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-04-01 11:25:45,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527503822] [2023-04-01 11:25:45,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:45,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 11:25:45,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 11:25:45,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:25:45,847 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-01 11:25:46,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:25:46,833 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2023-04-01 11:25:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:25:46,834 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 55 [2023-04-01 11:25:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:25:46,835 INFO L225 Difference]: With dead ends: 89 [2023-04-01 11:25:46,835 INFO L226 Difference]: Without dead ends: 87 [2023-04-01 11:25:46,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-04-01 11:25:46,837 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 11:25:46,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 150 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 11:25:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-01 11:25:46,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2023-04-01 11:25:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 11:25:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2023-04-01 11:25:46,869 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 55 [2023-04-01 11:25:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:25:46,870 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2023-04-01 11:25:46,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2023-04-01 11:25:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2023-04-01 11:25:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 11:25:46,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:25:46,876 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:25:46,887 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 11:25:47,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:47,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:25:47,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:25:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1143149830, now seen corresponding path program 1 times [2023-04-01 11:25:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:25:47,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141702077] [2023-04-01 11:25:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:25:47,101 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:25:47,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699720564] [2023-04-01 11:25:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:25:47,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:25:47,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:25:47,109 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 11:25:47,110 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 11:25:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:25:47,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 11:25:47,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:25:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-04-01 11:25:47,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:25:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-04-01 11:25:52,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:25:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141702077] [2023-04-01 11:25:52,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:25:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699720564] [2023-04-01 11:25:52,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699720564] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:25:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463791077] [2023-04-01 11:25:52,218 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 11:25:52,218 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:25:52,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:25:52,218 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:25:52,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:25:52,241 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:25:55,964 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:25:55,969 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:25:55,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:25:55,980 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:25:57,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2333#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:25:57,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:25:57,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:25:57,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-04-01 11:25:57,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454941519] [2023-04-01 11:25:57,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:25:57,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:25:57,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:25:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:25:57,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:25:57,266 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-04-01 11:26:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:02,794 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2023-04-01 11:26:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 11:26:02,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 67 [2023-04-01 11:26:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:02,796 INFO L225 Difference]: With dead ends: 116 [2023-04-01 11:26:02,796 INFO L226 Difference]: Without dead ends: 114 [2023-04-01 11:26:02,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 11:26:02,798 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:02,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 141 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 11:26:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-04-01 11:26:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2023-04-01 11:26:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 32 states have call successors, (32), 15 states have call predecessors, (32), 14 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-04-01 11:26:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2023-04-01 11:26:02,848 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 67 [2023-04-01 11:26:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:02,848 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2023-04-01 11:26:02,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2023-04-01 11:26:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2023-04-01 11:26:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 11:26:02,849 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:02,849 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:02,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 11:26:03,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:03,055 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:03,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:03,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1592897112, now seen corresponding path program 1 times [2023-04-01 11:26:03,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:03,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803915453] [2023-04-01 11:26:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:03,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:03,064 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:03,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078084177] [2023-04-01 11:26:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:03,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:03,066 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:26:03,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:26:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:26:03,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 11:26:03,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-04-01 11:26:03,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:08,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:08,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803915453] [2023-04-01 11:26:08,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:08,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078084177] [2023-04-01 11:26:08,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078084177] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:26:08,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467007562] [2023-04-01 11:26:08,197 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 11:26:08,197 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:08,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:08,198 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:08,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:08,219 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:26:09,907 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:26:09,909 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:26:09,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:26:09,917 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:26:13,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3004#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:26:13,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:26:13,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 11:26:13,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 11:26:13,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668963126] [2023-04-01 11:26:13,848 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 11:26:13,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:26:13,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:26:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:26:13,849 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-01 11:26:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:14,394 INFO L93 Difference]: Finished difference Result 122 states and 147 transitions. [2023-04-01 11:26:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:26:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 78 [2023-04-01 11:26:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:14,396 INFO L225 Difference]: With dead ends: 122 [2023-04-01 11:26:14,396 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 11:26:14,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 11:26:14,399 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:14,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 151 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:26:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 11:26:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-04-01 11:26:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 63 states have internal predecessors, (66), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-01 11:26:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2023-04-01 11:26:14,432 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 78 [2023-04-01 11:26:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:14,432 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2023-04-01 11:26:14,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-01 11:26:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2023-04-01 11:26:14,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 11:26:14,433 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:14,433 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:14,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:26:14,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:14,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:14,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash 100754028, now seen corresponding path program 2 times [2023-04-01 11:26:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:14,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075012135] [2023-04-01 11:26:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:14,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:14,643 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:14,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320427506] [2023-04-01 11:26:14,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:26:14,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:14,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:14,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:26:14,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:26:14,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:26:14,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:26:14,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 11:26:14,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-04-01 11:26:14,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:26:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-04-01 11:26:16,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:26:16,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075012135] [2023-04-01 11:26:16,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:26:16,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320427506] [2023-04-01 11:26:16,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320427506] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:26:16,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176068283] [2023-04-01 11:26:16,062 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-01 11:26:16,062 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:26:16,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:26:16,062 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:26:16,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:26:16,085 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:26:19,491 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-01 11:26:19,493 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 57 for LOIs [2023-04-01 11:26:19,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:26:19,499 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:26:25,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3926#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 11:26:25,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:26:25,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:26:25,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2023-04-01 11:26:25,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413636525] [2023-04-01 11:26:25,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:26:25,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 11:26:25,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:26:25,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 11:26:25,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-04-01 11:26:25,265 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2023-04-01 11:26:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:26:27,385 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2023-04-01 11:26:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 11:26:27,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 89 [2023-04-01 11:26:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:26:27,387 INFO L225 Difference]: With dead ends: 127 [2023-04-01 11:26:27,387 INFO L226 Difference]: Without dead ends: 125 [2023-04-01 11:26:27,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 11:26:27,389 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:26:27,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 187 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 11:26:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-01 11:26:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-04-01 11:26:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-01 11:26:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2023-04-01 11:26:27,425 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 89 [2023-04-01 11:26:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:26:27,425 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2023-04-01 11:26:27,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2023-04-01 11:26:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2023-04-01 11:26:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 11:26:27,426 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:26:27,427 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:26:27,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:26:27,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:27,629 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:26:27,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:26:27,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1126241543, now seen corresponding path program 3 times [2023-04-01 11:26:27,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:26:27,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662268246] [2023-04-01 11:26:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:26:27,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:26:27,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:26:27,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331066446] [2023-04-01 11:26:27,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:26:27,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:26:27,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:26:27,638 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:26:27,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:26:27,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:26:27,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:26:27,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 11:26:27,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:26:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 72 proven. 43 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-04-01 11:26:28,219 INFO L327 TraceCheckSpWp]: Computing backward predicates...