/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:31:54,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:31:54,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:31:54,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:31:54,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:31:54,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:31:54,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:31:54,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:31:54,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:31:54,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:31:54,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:31:54,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:31:54,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:31:54,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:31:54,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:31:54,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:31:54,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:31:54,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:31:54,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:31:54,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:31:54,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:31:54,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:31:54,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:31:54,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:31:54,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 23:31:54,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:31:54,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:31:54,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:31:54,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:31:54,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:31:54,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:31:54,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:31:54,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:31:54,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:31:54,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:31:54,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:31:54,219 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 [2023-04-02 23:31:54,239 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:31:54,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:31:54,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:31:54,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:31:54,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:31:54,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:31:54,240 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:31:54,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:31:54,240 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:31:54,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:31:54,240 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:31:54,240 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:31:54,241 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:31:54,241 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:31:54,241 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:31:54,241 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:31:54,241 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:31:54,241 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:31:54,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:31:54,241 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:31:54,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:31:54,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:31:54,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:31:54,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:31:54,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:31:54,243 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:31:54,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:31:54,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:31:54,243 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:31:54,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:31:54,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:31:54,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:31:54,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:31:54,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:31:54,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:31:54,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:31:54,454 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:31:54,455 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:31:54,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2023-04-02 23:31:55,389 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:31:55,597 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:31:55,597 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound20.c [2023-04-02 23:31:55,601 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4c5e63d3/9846e919520a4003819a77eea025a5f5/FLAGab5801c6c [2023-04-02 23:31:55,612 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4c5e63d3/9846e919520a4003819a77eea025a5f5 [2023-04-02 23:31:55,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:31:55,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:31:55,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:31:55,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:31:55,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:31:55,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b1323b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55, skipping insertion in model container [2023-04-02 23:31:55,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:31:55,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:31:55,745 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/ps6-ll_unwindbound20.c[458,471] [2023-04-02 23:31:55,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:31:55,780 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:31:55,789 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/ps6-ll_unwindbound20.c[458,471] [2023-04-02 23:31:55,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:31:55,826 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:31:55,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55 WrapperNode [2023-04-02 23:31:55,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:31:55,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:31:55,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:31:55,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:31:55,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,850 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:31:55,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:31:55,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:31:55,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:31:55,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (1/1) ... [2023-04-02 23:31:55,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:31:55,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:31:55,873 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) [2023-04-02 23:31:55,881 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 [2023-04-02 23:31:55,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:31:55,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:31:55,898 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:31:55,898 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:31:55,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:31:55,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:31:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:31:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:31:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:31:55,942 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:31:55,944 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:31:56,037 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:31:56,050 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:31:56,050 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:31:56,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:31:56 BoogieIcfgContainer [2023-04-02 23:31:56,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:31:56,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:31:56,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:31:56,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:31:56,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:31:55" (1/3) ... [2023-04-02 23:31:56,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b8ca6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:31:56, skipping insertion in model container [2023-04-02 23:31:56,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:31:55" (2/3) ... [2023-04-02 23:31:56,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b8ca6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:31:56, skipping insertion in model container [2023-04-02 23:31:56,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:31:56" (3/3) ... [2023-04-02 23:31:56,057 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound20.c [2023-04-02 23:31:56,068 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:31:56,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:31:56,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:31:56,100 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;@6c63c8c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:31:56,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:31:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:31:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 23:31:56,107 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:31:56,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:31:56,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:31:56,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:31:56,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1588681703, now seen corresponding path program 1 times [2023-04-02 23:31:56,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:31:56,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216335081] [2023-04-02 23:31:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:56,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:31:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:31:56,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:31:56,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216335081] [2023-04-02 23:31:56,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 23:31:56,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650764972] [2023-04-02 23:31:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:56,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:31:56,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:31:56,197 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) [2023-04-02 23:31:56,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:31:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:31:56,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 23:31:56,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:31:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:31:56,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:31:56,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650764972] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:31:56,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:31:56,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:31:56,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834040908] [2023-04-02 23:31:56,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:31:56,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:31:56,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:31:56,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:31:56,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:31:56,299 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:31:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:31:56,314 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-04-02 23:31:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:31:56,316 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-02 23:31:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:31:56,320 INFO L225 Difference]: With dead ends: 41 [2023-04-02 23:31:56,320 INFO L226 Difference]: Without dead ends: 21 [2023-04-02 23:31:56,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:31:56,324 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:31:56,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:31:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-02 23:31:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-02 23:31:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:31:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-02 23:31:56,347 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2023-04-02 23:31:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:31:56,347 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-02 23:31:56,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:31:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-02 23:31:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:31:56,348 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:31:56,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:31:56,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:31:56,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 23:31:56,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:31:56,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:31:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1599510784, now seen corresponding path program 1 times [2023-04-02 23:31:56,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:31:56,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388702076] [2023-04-02 23:31:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:56,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:31:56,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:31:56,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419009242] [2023-04-02 23:31:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:56,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:31:56,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:31:56,587 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) [2023-04-02 23:31:56,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:31:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:31:56,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:31:56,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:31:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:31:56,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:31:56,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:31:56,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388702076] [2023-04-02 23:31:56,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:31:56,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419009242] [2023-04-02 23:31:56,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419009242] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:31:56,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:31:56,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:31:56,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581764061] [2023-04-02 23:31:56,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:31:56,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:31:56,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:31:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:31:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:31:56,697 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 23:31:56,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:31:56,708 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-02 23:31:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:31:56,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-02 23:31:56,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:31:56,710 INFO L225 Difference]: With dead ends: 31 [2023-04-02 23:31:56,710 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 23:31:56,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:31:56,711 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:31:56,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:31:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 23:31:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 23:31:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:31:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-02 23:31:56,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-04-02 23:31:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:31:56,716 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-02 23:31:56,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 23:31:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-02 23:31:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:31:56,716 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:31:56,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:31:56,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 23:31:56,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 23:31:56,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:31:56,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:31:56,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1601298244, now seen corresponding path program 1 times [2023-04-02 23:31:56,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:31:56,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266013609] [2023-04-02 23:31:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:56,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:31:56,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:31:56,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069484430] [2023-04-02 23:31:56,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:56,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:31:56,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:31:56,946 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) [2023-04-02 23:31:56,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:31:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:31:57,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 23:31:57,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:31:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:31:57,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:31:57,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:31:57,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266013609] [2023-04-02 23:31:57,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:31:57,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069484430] [2023-04-02 23:31:57,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069484430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:31:57,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:31:57,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:31:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737623515] [2023-04-02 23:31:57,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:31:57,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:31:57,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:31:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:31:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:31:57,098 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:31:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:31:57,259 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-02 23:31:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:31:57,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-02 23:31:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:31:57,260 INFO L225 Difference]: With dead ends: 33 [2023-04-02 23:31:57,260 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 23:31:57,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:31:57,261 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:31:57,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:31:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 23:31:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 23:31:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:31:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-02 23:31:57,266 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 15 [2023-04-02 23:31:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:31:57,266 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-02 23:31:57,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:31:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-02 23:31:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:31:57,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:31:57,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:31:57,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 23:31:57,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:31:57,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:31:57,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:31:57,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1088104383, now seen corresponding path program 1 times [2023-04-02 23:31:57,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:31:57,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912007396] [2023-04-02 23:31:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:57,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:31:57,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:31:57,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540074337] [2023-04-02 23:31:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:57,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:31:57,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:31:57,513 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) [2023-04-02 23:31:57,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:31:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:31:57,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 23:31:57,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:31:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:31:57,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:31:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:31:57,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:31:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912007396] [2023-04-02 23:31:57,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:31:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540074337] [2023-04-02 23:31:57,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540074337] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:31:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965001502] [2023-04-02 23:31:57,738 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:31:57,738 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:31:57,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:31:57,743 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:31:57,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:31:57,835 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:31:58,330 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:31:58,332 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:31:58,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:31:58,341 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:31:58,788 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:31:58,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:31:58,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:31:58,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 23:31:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118645854] [2023-04-02 23:31:58,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:31:58,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:31:58,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:31:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:31:58,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:31:58,791 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:31:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:31:58,936 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-04-02 23:31:58,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:31:58,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2023-04-02 23:31:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:31:58,938 INFO L225 Difference]: With dead ends: 63 [2023-04-02 23:31:58,938 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 23:31:58,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:31:58,939 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:31:58,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:31:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 23:31:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-04-02 23:31:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 23:31:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2023-04-02 23:31:58,949 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 23 [2023-04-02 23:31:58,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:31:58,950 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2023-04-02 23:31:58,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:31:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2023-04-02 23:31:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:31:58,950 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:31:58,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:31:58,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 23:31:59,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:31:59,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:31:59,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:31:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1089891843, now seen corresponding path program 1 times [2023-04-02 23:31:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:31:59,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88069450] [2023-04-02 23:31:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:59,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:31:59,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:31:59,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683803036] [2023-04-02 23:31:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:31:59,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:31:59,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:31:59,173 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) [2023-04-02 23:31:59,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:31:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:31:59,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:31:59,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:31:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:31:59,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:31:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:31:59,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:31:59,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88069450] [2023-04-02 23:31:59,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:31:59,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683803036] [2023-04-02 23:31:59,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683803036] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:31:59,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450472314] [2023-04-02 23:31:59,372 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:31:59,373 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:31:59,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:31:59,373 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:31:59,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:31:59,393 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:31:59,670 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 83 for LOIs [2023-04-02 23:31:59,781 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:31:59,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:31:59,788 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:32:00,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '905#(and (exists ((v_main_~y~0_BEFORE_CALL_23 Int) (|v_old(~counter~0)_BEFORE_CALL_24| Int) (v_main_~c~0_BEFORE_CALL_19 Int) (v_main_~k~0_BEFORE_CALL_24 Int) (v_main_~x~0_BEFORE_CALL_23 Int)) (and (exists ((|v_main_#t~post5_21| Int)) (and (< |v_main_#t~post5_21| 20) (or (and (<= 0 (+ |#StackHeapBarrier| 32767 v_main_~k~0_BEFORE_CALL_24)) (<= v_main_~c~0_BEFORE_CALL_19 33025) (<= 1 |#StackHeapBarrier|) (<= 0 (+ v_main_~c~0_BEFORE_CALL_19 32767 v_main_~k~0_BEFORE_CALL_24)) (<= v_main_~c~0_BEFORE_CALL_19 v_main_~k~0_BEFORE_CALL_24) (= ~counter~0 (+ |v_main_#t~post5_21| 1)) (<= 2 (+ v_main_~c~0_BEFORE_CALL_19 |#StackHeapBarrier|)) (= v_main_~y~0_BEFORE_CALL_23 v_main_~c~0_BEFORE_CALL_19) (<= v_main_~c~0_BEFORE_CALL_19 (+ 33024 |#StackHeapBarrier|)) (<= 0 (+ v_main_~k~0_BEFORE_CALL_24 32768)) (<= v_main_~k~0_BEFORE_CALL_24 (+ 255 v_main_~c~0_BEFORE_CALL_19)) (= |v_old(~counter~0)_BEFORE_CALL_24| 0) (= |v_main_#t~post5_21| v_main_~c~0_BEFORE_CALL_19) (<= 1 v_main_~c~0_BEFORE_CALL_19) (<= v_main_~k~0_BEFORE_CALL_24 (+ 255 |#StackHeapBarrier|)) (= |#NULL.offset| 0) (<= (+ v_main_~c~0_BEFORE_CALL_19 v_main_~k~0_BEFORE_CALL_24) 33281) (<= v_main_~k~0_BEFORE_CALL_24 256) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (= |v_main_#t~post5_21| 0) (= v_main_~y~0_BEFORE_CALL_23 0) (<= 0 (+ v_main_~k~0_BEFORE_CALL_24 32768)) (= |v_old(~counter~0)_BEFORE_CALL_24| 0) (= v_main_~x~0_BEFORE_CALL_23 0) (= |#NULL.offset| 0) (= ~counter~0 1) (= v_main_~c~0_BEFORE_CALL_19 0) (<= v_main_~k~0_BEFORE_CALL_24 256) (= |#NULL.base| 0))))) (not (= (+ (* (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23) 2) (* 5 (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23)) (* 6 (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23))) (+ (* v_main_~x~0_BEFORE_CALL_23 12) (* v_main_~y~0_BEFORE_CALL_23 v_main_~y~0_BEFORE_CALL_23)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:32:00,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:32:00,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:32:00,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-04-02 23:32:00,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766421941] [2023-04-02 23:32:00,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:32:00,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:32:00,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:32:00,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:32:00,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:32:00,531 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:32:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:32:00,622 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-04-02 23:32:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:32:00,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2023-04-02 23:32:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:32:00,624 INFO L225 Difference]: With dead ends: 65 [2023-04-02 23:32:00,624 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 23:32:00,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-04-02 23:32:00,625 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:32:00,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:32:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 23:32:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-04-02 23:32:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 23:32:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-04-02 23:32:00,636 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 23 [2023-04-02 23:32:00,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:32:00,636 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-04-02 23:32:00,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:32:00,636 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-04-02 23:32:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 23:32:00,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:32:00,641 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:32:00,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:32:00,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:32:00,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:32:00,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:32:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1030500817, now seen corresponding path program 1 times [2023-04-02 23:32:00,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:32:00,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292291842] [2023-04-02 23:32:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:32:00,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:32:00,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:32:00,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83079338] [2023-04-02 23:32:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:32:00,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:32:00,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:32:00,871 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) [2023-04-02 23:32:00,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:32:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:32:00,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 23:32:00,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:32:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 23:32:00,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:32:05,035 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (= (* c_main_~y~0 c_main_~k~0) .cse0) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false [2023-04-02 23:32:21,283 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_29 Int) (v_main_~y~0_BEFORE_CALL_28 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28))) (or (= (mod (+ .cse0 (* 7 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 10) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 6)) 12) 0) (= (* v_main_~y~0_BEFORE_CALL_28 v_main_~k~0_BEFORE_CALL_29) .cse0))))) is different from true [2023-04-02 23:32:40,299 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_29 Int) (v_main_~y~0_BEFORE_CALL_28 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28))) (or (= (mod (+ .cse0 (* 7 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 10) (* v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 v_main_~y~0_BEFORE_CALL_28 6)) 12) 0) (= (* v_main_~y~0_BEFORE_CALL_28 v_main_~k~0_BEFORE_CALL_29) .cse0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-04-02 23:33:00,168 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) .cse0 1)))))) is different from false [2023-04-02 23:33:02,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292291842] [2023-04-02 23:33:02,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83079338] [2023-04-02 23:33:02,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83079338] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:33:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733419631] [2023-04-02 23:33:02,192 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:33:02,192 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:02,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:02,193 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:02,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:02,222 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:33:02,610 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:02,612 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:33:02,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:33:02,617 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:03,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1265#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:03,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:03,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:33:03,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-04-02 23:33:03,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510322259] [2023-04-02 23:33:03,287 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:03,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:33:03,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:33:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=625, Unknown=6, NotChecked=212, Total=930 [2023-04-02 23:33:03,288 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 23:33:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:03,385 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2023-04-02 23:33:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 23:33:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2023-04-02 23:33:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:03,387 INFO L225 Difference]: With dead ends: 56 [2023-04-02 23:33:03,387 INFO L226 Difference]: Without dead ends: 50 [2023-04-02 23:33:03,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=101, Invalid=721, Unknown=6, NotChecked=228, Total=1056 [2023-04-02 23:33:03,388 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:03,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:33:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-02 23:33:03,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-04-02 23:33:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 23:33:03,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-04-02 23:33:03,394 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 34 [2023-04-02 23:33:03,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:03,394 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-04-02 23:33:03,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 23:33:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-04-02 23:33:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 23:33:03,395 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:03,395 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:03,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 23:33:03,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:03,601 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:03,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:03,601 INFO L85 PathProgramCache]: Analyzing trace with hash -602942286, now seen corresponding path program 2 times [2023-04-02 23:33:03,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:03,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129034616] [2023-04-02 23:33:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:03,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:03,611 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:03,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954418747] [2023-04-02 23:33:03,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:33:03,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:03,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:03,615 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) [2023-04-02 23:33:03,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:33:03,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 23:33:03,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:33:03,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 23:33:03,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:33:03,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:33:04,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:04,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129034616] [2023-04-02 23:33:04,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:04,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954418747] [2023-04-02 23:33:04,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954418747] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:04,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817804820] [2023-04-02 23:33:04,157 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:33:04,157 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:04,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:04,158 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:04,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:04,170 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:33:04,508 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:04,510 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:33:04,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:33:04,514 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:05,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1709#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:05,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:05,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:05,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-04-02 23:33:05,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870160029] [2023-04-02 23:33:05,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:05,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 23:33:05,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:05,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 23:33:05,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 23:33:05,236 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-02 23:33:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:05,715 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2023-04-02 23:33:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 23:33:05,716 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 42 [2023-04-02 23:33:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:05,716 INFO L225 Difference]: With dead ends: 67 [2023-04-02 23:33:05,716 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 23:33:05,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 23:33:05,719 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:05,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 141 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:33:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 23:33:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2023-04-02 23:33:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 23:33:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2023-04-02 23:33:05,729 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 42 [2023-04-02 23:33:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:05,729 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2023-04-02 23:33:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-02 23:33:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-04-02 23:33:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-02 23:33:05,730 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:05,730 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:05,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:05,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:05,931 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:05,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:05,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1070382990, now seen corresponding path program 1 times [2023-04-02 23:33:05,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:05,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473348503] [2023-04-02 23:33:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:05,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:05,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:05,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379849581] [2023-04-02 23:33:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:05,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:05,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:05,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:33:05,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 23:33:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:06,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 23:33:06,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:33:06,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 23:33:06,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:06,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473348503] [2023-04-02 23:33:06,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:06,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379849581] [2023-04-02 23:33:06,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379849581] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:06,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428345697] [2023-04-02 23:33:06,218 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:33:06,218 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:06,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:06,218 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:06,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:06,230 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:33:06,566 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:06,568 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:33:06,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:33:06,573 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:07,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2247#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:07,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:07,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:07,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 23:33:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139158418] [2023-04-02 23:33:07,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:07,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:33:07,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:33:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:33:07,103 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2023-04-02 23:33:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:07,296 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2023-04-02 23:33:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 23:33:07,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 52 [2023-04-02 23:33:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:07,298 INFO L225 Difference]: With dead ends: 131 [2023-04-02 23:33:07,298 INFO L226 Difference]: Without dead ends: 121 [2023-04-02 23:33:07,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 23:33:07,299 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:07,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 129 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:33:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-02 23:33:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2023-04-02 23:33:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 23:33:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2023-04-02 23:33:07,328 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 52 [2023-04-02 23:33:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:07,328 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2023-04-02 23:33:07,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2023-04-02 23:33:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2023-04-02 23:33:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 23:33:07,329 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:07,330 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:07,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:07,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 23:33:07,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:07,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2024532139, now seen corresponding path program 3 times [2023-04-02 23:33:07,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:07,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001634543] [2023-04-02 23:33:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:07,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:07,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:07,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858061838] [2023-04-02 23:33:07,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:33:07,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:07,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:07,555 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:33:07,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 23:33:07,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:33:07,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:33:07,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-02 23:33:07,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-04-02 23:33:07,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:07,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:07,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001634543] [2023-04-02 23:33:07,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:07,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858061838] [2023-04-02 23:33:07,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858061838] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:33:07,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143086172] [2023-04-02 23:33:07,889 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:33:07,889 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:07,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:07,890 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:07,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:07,913 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:33:08,219 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:08,221 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:33:08,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:33:08,229 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:09,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2881#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:09,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:09,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:33:09,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-02 23:33:09,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718257171] [2023-04-02 23:33:09,054 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:09,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:33:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:33:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2023-04-02 23:33:09,055 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-02 23:33:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:09,213 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2023-04-02 23:33:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 23:33:09,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 66 [2023-04-02 23:33:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:09,214 INFO L225 Difference]: With dead ends: 106 [2023-04-02 23:33:09,214 INFO L226 Difference]: Without dead ends: 100 [2023-04-02 23:33:09,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 23:33:09,215 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:09,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:33:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-02 23:33:09,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-04-02 23:33:09,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 18 states have call successors, (18), 14 states have call predecessors, (18), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 23:33:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2023-04-02 23:33:09,230 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 66 [2023-04-02 23:33:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:09,230 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2023-04-02 23:33:09,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-02 23:33:09,230 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2023-04-02 23:33:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 23:33:09,231 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:09,231 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:09,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-02 23:33:09,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:09,432 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:09,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash -108267978, now seen corresponding path program 4 times [2023-04-02 23:33:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:09,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846293460] [2023-04-02 23:33:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:09,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:09,439 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:09,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439167448] [2023-04-02 23:33:09,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 23:33:09,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:09,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:09,440 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:33:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 23:33:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:13,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-02 23:33:13,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-04-02 23:33:13,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:17,830 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (= (* c_main_~y~0 c_main_~k~0) .cse0) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false [2023-04-02 23:33:37,866 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_110 Int) (v_main_~k~0_BEFORE_CALL_113 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110))) (or (= .cse0 (* v_main_~k~0_BEFORE_CALL_113 v_main_~y~0_BEFORE_CALL_110)) (= (mod (+ (* v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 6) (* 7 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110) .cse0 (* v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 10)) 12) 0))))) is different from true [2023-04-02 23:33:55,895 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_110 Int) (v_main_~k~0_BEFORE_CALL_113 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110))) (or (= .cse0 (* v_main_~k~0_BEFORE_CALL_113 v_main_~y~0_BEFORE_CALL_110)) (= (mod (+ (* v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 6) (* 7 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110) .cse0 (* v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 v_main_~y~0_BEFORE_CALL_110 10)) 12) 0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-04-02 23:34:16,510 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) .cse0 1)))))) is different from false [2023-04-02 23:34:18,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846293460] [2023-04-02 23:34:18,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:34:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439167448] [2023-04-02 23:34:18,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439167448] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:34:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163444302] [2023-04-02 23:34:18,533 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:34:18,533 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:34:18,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:34:18,534 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:34:18,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:34:18,545 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:34:18,824 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:34:18,825 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:34:18,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:34:18,830 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:34:19,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3493#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:34:19,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:34:19,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:34:19,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-04-02 23:34:19,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366249894] [2023-04-02 23:34:19,561 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:34:19,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:34:19,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:34:19,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=904, Unknown=7, NotChecked=252, Total=1260 [2023-04-02 23:34:19,563 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-02 23:34:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:19,846 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2023-04-02 23:34:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 23:34:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 74 [2023-04-02 23:34:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:19,847 INFO L225 Difference]: With dead ends: 105 [2023-04-02 23:34:19,848 INFO L226 Difference]: Without dead ends: 99 [2023-04-02 23:34:19,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=111, Invalid=1020, Unknown=7, NotChecked=268, Total=1406 [2023-04-02 23:34:19,848 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:19,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 295 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:34:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-02 23:34:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-04-02 23:34:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 17 states have call successors, (17), 14 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 23:34:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2023-04-02 23:34:19,870 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 74 [2023-04-02 23:34:19,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:19,870 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2023-04-02 23:34:19,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-02 23:34:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2023-04-02 23:34:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 23:34:19,871 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:19,871 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:19,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 23:34:20,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 23:34:20,077 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:20,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash -315923433, now seen corresponding path program 5 times [2023-04-02 23:34:20,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:20,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786868736] [2023-04-02 23:34:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:20,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:20,088 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:34:20,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151641953] [2023-04-02 23:34:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:34:20,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:20,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:20,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:34:20,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 23:34:24,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-02 23:34:24,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:34:24,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-02 23:34:24,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 26 proven. 128 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-04-02 23:34:24,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:34:24,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:24,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786868736] [2023-04-02 23:34:24,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:34:24,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151641953] [2023-04-02 23:34:24,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151641953] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:34:24,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898209513] [2023-04-02 23:34:24,683 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:34:24,683 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:34:24,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:34:24,683 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:34:24,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:34:24,696 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:34:24,964 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:34:24,966 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:34:24,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:34:24,971 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:34:25,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4123#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:34:25,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:34:25,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:34:25,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-04-02 23:34:25,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053599746] [2023-04-02 23:34:25,682 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:34:25,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 23:34:25,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:25,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 23:34:25,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 23:34:25,683 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-02 23:34:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:25,944 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2023-04-02 23:34:25,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 23:34:25,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 82 [2023-04-02 23:34:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:25,945 INFO L225 Difference]: With dead ends: 104 [2023-04-02 23:34:25,945 INFO L226 Difference]: Without dead ends: 98 [2023-04-02 23:34:25,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 23:34:25,946 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:25,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 320 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:34:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-02 23:34:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-04-02 23:34:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 23:34:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2023-04-02 23:34:25,956 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 82 [2023-04-02 23:34:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:25,956 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2023-04-02 23:34:25,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-02 23:34:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2023-04-02 23:34:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-02 23:34:25,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:25,960 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:25,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-02 23:34:26,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 23:34:26,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:26,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:26,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1160995064, now seen corresponding path program 6 times [2023-04-02 23:34:26,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:26,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334377712] [2023-04-02 23:34:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:26,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:26,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:34:26,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616643574] [2023-04-02 23:34:26,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:34:26,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:26,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:26,169 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:34:26,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 23:34:26,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:34:26,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:34:26,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-02 23:34:26,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-04-02 23:34:26,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:34:26,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334377712] [2023-04-02 23:34:26,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:34:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616643574] [2023-04-02 23:34:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616643574] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:34:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700308189] [2023-04-02 23:34:26,549 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:34:26,550 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:34:26,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:34:26,550 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:34:26,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:34:26,561 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:34:26,808 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:34:26,810 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:34:26,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:34:26,815 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:34:27,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4773#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:34:27,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:34:27,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:34:27,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-04-02 23:34:27,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43162172] [2023-04-02 23:34:27,519 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:34:27,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:34:27,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:27,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:34:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 23:34:27,521 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-02 23:34:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:27,748 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2023-04-02 23:34:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 23:34:27,749 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 90 [2023-04-02 23:34:27,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:27,749 INFO L225 Difference]: With dead ends: 103 [2023-04-02 23:34:27,750 INFO L226 Difference]: Without dead ends: 97 [2023-04-02 23:34:27,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 23:34:27,750 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:27,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 402 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:34:27,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-02 23:34:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-04-02 23:34:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 23:34:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2023-04-02 23:34:27,761 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 90 [2023-04-02 23:34:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:27,762 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2023-04-02 23:34:27,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-02 23:34:27,762 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2023-04-02 23:34:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 23:34:27,762 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:27,763 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:27,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-02 23:34:27,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 23:34:27,967 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:27,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1403317465, now seen corresponding path program 7 times [2023-04-02 23:34:27,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:27,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653957534] [2023-04-02 23:34:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:27,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:27,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:34:27,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351019549] [2023-04-02 23:34:27,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 23:34:27,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:27,978 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:34:27,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 23:34:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:28,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-02 23:34:28,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 51 proven. 181 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-02 23:34:28,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:34:32,571 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (= (* c_main_~y~0 c_main_~k~0) .cse0) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false [2023-04-02 23:34:52,612 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_176 Int) (v_main_~y~0_BEFORE_CALL_188 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188))) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 10) (* 7 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188) (* v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 6) .cse0) 12) 0) (= (* v_main_~k~0_BEFORE_CALL_176 v_main_~y~0_BEFORE_CALL_188) .cse0))))) is different from true [2023-04-02 23:35:10,643 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_176 Int) (v_main_~y~0_BEFORE_CALL_188 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188))) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 10) (* 7 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188) (* v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 v_main_~y~0_BEFORE_CALL_188 6) .cse0) 12) 0) (= (* v_main_~k~0_BEFORE_CALL_176 v_main_~y~0_BEFORE_CALL_188) .cse0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-04-02 23:35:24,741 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) .cse0 1)))))) is different from false [2023-04-02 23:35:26,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653957534] [2023-04-02 23:35:26,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:35:26,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351019549] [2023-04-02 23:35:26,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351019549] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:26,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [750674852] [2023-04-02 23:35:26,762 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:35:26,762 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:35:26,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:35:26,762 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:35:26,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:35:26,774 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:35:27,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:35:27,067 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:35:27,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:35:27,073 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:35:27,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5448#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:35:27,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:35:27,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:27,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-04-02 23:35:27,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160938318] [2023-04-02 23:35:27,876 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:35:27,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 23:35:27,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:27,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 23:35:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1099, Unknown=4, NotChecked=276, Total=1482 [2023-04-02 23:35:27,877 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-02 23:35:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:28,234 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2023-04-02 23:35:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 23:35:28,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 98 [2023-04-02 23:35:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:28,235 INFO L225 Difference]: With dead ends: 105 [2023-04-02 23:35:28,235 INFO L226 Difference]: Without dead ends: 99 [2023-04-02 23:35:28,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=117, Invalid=1227, Unknown=4, NotChecked=292, Total=1640 [2023-04-02 23:35:28,236 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:28,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 457 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:35:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-04-02 23:35:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-04-02 23:35:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 23:35:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2023-04-02 23:35:28,255 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 98 [2023-04-02 23:35:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:28,255 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2023-04-02 23:35:28,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-02 23:35:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2023-04-02 23:35:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 23:35:28,256 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:28,256 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:28,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:28,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 23:35:28,463 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:28,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1585828780, now seen corresponding path program 2 times [2023-04-02 23:35:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:28,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599764150] [2023-04-02 23:35:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:28,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:28,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:35:28,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147071046] [2023-04-02 23:35:28,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:35:28,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:28,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:28,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:28,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 23:35:41,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-04-02 23:35:41,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:35:41,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 23:35:41,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:35:41,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:35:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-04-02 23:35:41,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599764150] [2023-04-02 23:35:41,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:35:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147071046] [2023-04-02 23:35:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147071046] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:35:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821803030] [2023-04-02 23:35:41,871 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:35:41,871 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:35:41,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:35:41,871 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:35:41,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:35:41,883 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:35:42,118 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:35:42,121 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:35:42,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:35:42,125 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:35:42,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6378#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:35:42,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:35:42,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:35:42,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2023-04-02 23:35:42,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929391774] [2023-04-02 23:35:42,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:35:42,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 23:35:42,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 23:35:42,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=1137, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 23:35:42,684 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) [2023-04-02 23:35:43,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:43,103 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2023-04-02 23:35:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-04-02 23:35:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) Word has length 100 [2023-04-02 23:35:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:43,107 INFO L225 Difference]: With dead ends: 241 [2023-04-02 23:35:43,107 INFO L226 Difference]: Without dead ends: 231 [2023-04-02 23:35:43,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 258 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=852, Invalid=2570, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 23:35:43,110 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:43,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 164 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:35:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-04-02 23:35:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 186. [2023-04-02 23:35:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 138 states have internal predecessors, (140), 34 states have call successors, (34), 24 states have call predecessors, (34), 22 states have return successors, (32), 23 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-02 23:35:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 206 transitions. [2023-04-02 23:35:43,131 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 206 transitions. Word has length 100 [2023-04-02 23:35:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:43,132 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 206 transitions. [2023-04-02 23:35:43,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (26), 21 states have call predecessors, (26), 22 states have call successors, (26) [2023-04-02 23:35:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 206 transitions. [2023-04-02 23:35:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 23:35:43,133 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:43,133 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:43,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:43,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:43,345 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:43,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash -645855302, now seen corresponding path program 8 times [2023-04-02 23:35:43,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:43,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098455027] [2023-04-02 23:35:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:43,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:43,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:35:43,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472165106] [2023-04-02 23:35:43,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:35:43,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:43,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:43,369 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:43,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 23:35:48,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-04-02 23:35:48,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:35:48,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 56 conjunts are in the unsatisfiable core [2023-04-02 23:35:48,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 41 proven. 236 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-04-02 23:35:49,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:35:49,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:49,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098455027] [2023-04-02 23:35:49,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:35:49,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472165106] [2023-04-02 23:35:49,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472165106] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:49,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025781309] [2023-04-02 23:35:49,297 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:35:49,298 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:35:49,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:35:49,298 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:35:49,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:35:49,310 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:35:49,640 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:35:49,642 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:35:49,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:35:49,647 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:35:50,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7433#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:35:50,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:35:50,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:50,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-04-02 23:35:50,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947625823] [2023-04-02 23:35:50,485 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:35:50,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 23:35:50,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:50,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 23:35:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 23:35:50,486 INFO L87 Difference]: Start difference. First operand 186 states and 206 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-02 23:35:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:50,842 INFO L93 Difference]: Finished difference Result 191 states and 210 transitions. [2023-04-02 23:35:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 23:35:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 106 [2023-04-02 23:35:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:50,843 INFO L225 Difference]: With dead ends: 191 [2023-04-02 23:35:50,843 INFO L226 Difference]: Without dead ends: 185 [2023-04-02 23:35:50,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=1354, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 23:35:50,844 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:50,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 488 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:35:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-04-02 23:35:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-04-02 23:35:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 129 states have (on average 1.0775193798449612) internal successors, (139), 137 states have internal predecessors, (139), 33 states have call successors, (33), 24 states have call predecessors, (33), 22 states have return successors, (31), 23 states have call predecessors, (31), 31 states have call successors, (31) [2023-04-02 23:35:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 203 transitions. [2023-04-02 23:35:50,865 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 203 transitions. Word has length 106 [2023-04-02 23:35:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:50,865 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 203 transitions. [2023-04-02 23:35:50,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-02 23:35:50,865 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 203 transitions. [2023-04-02 23:35:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-02 23:35:50,867 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:50,867 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:50,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 23:35:51,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 23:35:51,074 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:51,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:51,074 INFO L85 PathProgramCache]: Analyzing trace with hash 113815963, now seen corresponding path program 9 times [2023-04-02 23:35:51,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:51,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762720588] [2023-04-02 23:35:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:51,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:51,081 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:35:51,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615310852] [2023-04-02 23:35:51,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:35:51,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:51,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:51,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:51,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 23:35:51,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:35:51,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:35:51,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjunts are in the unsatisfiable core [2023-04-02 23:35:51,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-04-02 23:35:51,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:35:51,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:35:51,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762720588] [2023-04-02 23:35:51,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:35:51,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615310852] [2023-04-02 23:35:51,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615310852] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:35:51,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188627271] [2023-04-02 23:35:51,547 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-02 23:35:51,547 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:35:51,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:35:51,548 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:35:51,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:35:51,559 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:35:51,841 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:35:51,843 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 28 for LOIs [2023-04-02 23:35:51,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:35:51,848 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:35:52,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8406#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:35:52,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:35:52,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:35:52,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-04-02 23:35:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632989884] [2023-04-02 23:35:52,640 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:35:52,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 23:35:52,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:35:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 23:35:52,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 23:35:52,641 INFO L87 Difference]: Start difference. First operand 185 states and 203 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-02 23:35:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:35:53,014 INFO L93 Difference]: Finished difference Result 190 states and 207 transitions. [2023-04-02 23:35:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 23:35:53,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 114 [2023-04-02 23:35:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:35:53,015 INFO L225 Difference]: With dead ends: 190 [2023-04-02 23:35:53,015 INFO L226 Difference]: Without dead ends: 184 [2023-04-02 23:35:53,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 23:35:53,016 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:35:53,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 591 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 23:35:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-02 23:35:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-04-02 23:35:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 129 states have (on average 1.069767441860465) internal successors, (138), 136 states have internal predecessors, (138), 32 states have call successors, (32), 24 states have call predecessors, (32), 22 states have return successors, (30), 23 states have call predecessors, (30), 30 states have call successors, (30) [2023-04-02 23:35:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2023-04-02 23:35:53,037 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 114 [2023-04-02 23:35:53,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:35:53,037 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2023-04-02 23:35:53,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-04-02 23:35:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2023-04-02 23:35:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 23:35:53,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:35:53,038 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:35:53,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-04-02 23:35:53,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 23:35:53,243 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:35:53,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:35:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2055006844, now seen corresponding path program 10 times [2023-04-02 23:35:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:35:53,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710844833] [2023-04-02 23:35:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:35:53,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:35:53,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:35:53,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946445037] [2023-04-02 23:35:53,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 23:35:53,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:35:53,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:35:53,273 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:35:53,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 23:35:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:35:54,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-02 23:35:54,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:35:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 66 proven. 313 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-04-02 23:35:54,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:35:58,393 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (= (* c_main_~y~0 c_main_~k~0) .cse0) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false [2023-04-02 23:36:14,436 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~y~0_BEFORE_CALL_288 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288))) (or (= (mod (+ .cse0 (* v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 10) (* 7 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288) (* v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 6)) 12) 0) (= .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_288)))))) is different from true [2023-04-02 23:36:32,780 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~k~0_BEFORE_CALL_255 Int) (v_main_~y~0_BEFORE_CALL_288 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288))) (or (= (mod (+ .cse0 (* v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 10) (* 7 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288) (* v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 v_main_~y~0_BEFORE_CALL_288 6)) 12) 0) (= .cse0 (* v_main_~k~0_BEFORE_CALL_255 v_main_~y~0_BEFORE_CALL_288))))) (= c___VERIFIER_assert_~cond 0)) is different from true