/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 IntervalDomain -i ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:11:30,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:11:30,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:11:30,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:11:30,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:11:30,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:11:30,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:11:30,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:11:30,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:11:30,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:11:30,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:11:30,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:11:30,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:11:30,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:11:30,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:11:30,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:11:30,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:11:30,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:11:30,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:11:30,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:11:30,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:11:30,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:11:30,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:11:30,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:11:30,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 23:11:30,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:11:30,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:11:30,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:11:30,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:11:30,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:11:30,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:11:30,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:11:30,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:11:30,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:11:30,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:11:30,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:11:30,138 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 [2023-03-31 23:11:30,163 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:11:30,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:11:30,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:11:30,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:11:30,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:11:30,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:11:30,165 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:11:30,165 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:11:30,165 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:11:30,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:11:30,165 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:11:30,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:11:30,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:11:30,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:11:30,166 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:11:30,166 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:11:30,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:11:30,166 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:11:30,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:11:30,167 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:11:30,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:11:30,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:11:30,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:11:30,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:11:30,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:11:30,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:11:30,168 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:11:30,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:11:30,168 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:11:30,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:11:30,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:11:30,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:11:30,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:11:30,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:11:30,169 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:11:30,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:11:30,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:11:30,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:11:30,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:11:30,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:11:30,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:11:30,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:11:30,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:11:30,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:11:30,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:11:30,393 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:11:30,394 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:11:30,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2023-03-31 23:11:31,562 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:11:31,737 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:11:31,737 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2023-03-31 23:11:31,745 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dfa4bd69/9b2379edfcc64e9e8e2f0a561b01c9ed/FLAG063b4d3fe [2023-03-31 23:11:31,762 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dfa4bd69/9b2379edfcc64e9e8e2f0a561b01c9ed [2023-03-31 23:11:31,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:11:31,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:11:31,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:11:31,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:11:31,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:11:31,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:11:31" (1/1) ... [2023-03-31 23:11:31,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e34678f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:31, skipping insertion in model container [2023-03-31 23:11:31,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:11:31" (1/1) ... [2023-03-31 23:11:31,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:11:31,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:11:31,943 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/cohendiv-ll_valuebound1.c[576,589] [2023-03-31 23:11:31,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:11:31,973 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:11:31,984 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/cohendiv-ll_valuebound1.c[576,589] [2023-03-31 23:11:32,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:11:32,015 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:11:32,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32 WrapperNode [2023-03-31 23:11:32,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:11:32,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:11:32,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:11:32,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:11:32,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (1/1) ... [2023-03-31 23:11:32,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (1/1) ... [2023-03-31 23:11:32,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (1/1) ... [2023-03-31 23:11:32,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (1/1) ... [2023-03-31 23:11:32,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (1/1) ... [2023-03-31 23:11:32,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (1/1) ... [2023-03-31 23:11:32,055 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (1/1) ... [2023-03-31 23:11:32,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (1/1) ... [2023-03-31 23:11:32,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:11:32,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:11:32,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:11:32,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:11:32,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (1/1) ... [2023-03-31 23:11:32,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:11:32,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:32,089 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) [2023-03-31 23:11:32,110 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 [2023-03-31 23:11:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:11:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:11:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:11:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:11:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:11:32,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:11:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:11:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:11:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:11:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:11:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:11:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:11:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:11:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:11:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:11:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:11:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:11:32,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:11:32,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:11:32,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:11:32,190 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:11:32,192 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:11:32,388 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:11:32,440 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:11:32,441 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:11:32,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:11:32 BoogieIcfgContainer [2023-03-31 23:11:32,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:11:32,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:11:32,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:11:32,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:11:32,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:11:31" (1/3) ... [2023-03-31 23:11:32,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48da95ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:11:32, skipping insertion in model container [2023-03-31 23:11:32,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:11:32" (2/3) ... [2023-03-31 23:11:32,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48da95ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:11:32, skipping insertion in model container [2023-03-31 23:11:32,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:11:32" (3/3) ... [2023-03-31 23:11:32,466 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound1.c [2023-03-31 23:11:32,498 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:11:32,498 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:11:32,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:11:32,564 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;@3edc2580, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:11:32,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:11:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 23:11:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 23:11:32,575 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:32,575 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:32,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:32,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash -914639077, now seen corresponding path program 1 times [2023-03-31 23:11:32,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:32,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897610087] [2023-03-31 23:11:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:32,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:32,722 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:32,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125509746] [2023-03-31 23:11:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:32,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:32,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:32,727 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) [2023-03-31 23:11:32,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:11:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:32,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 23:11:32,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:11:33,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:11:33,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:33,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897610087] [2023-03-31 23:11:33,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:33,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125509746] [2023-03-31 23:11:33,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125509746] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:11:33,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:11:33,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:11:33,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239406173] [2023-03-31 23:11:33,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:11:33,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:11:33,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:11:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:11:33,074 INFO L87 Difference]: Start difference. First operand has 35 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 23:11:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:33,265 INFO L93 Difference]: Finished difference Result 69 states and 106 transitions. [2023-03-31 23:11:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:11:33,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-03-31 23:11:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:33,274 INFO L225 Difference]: With dead ends: 69 [2023-03-31 23:11:33,274 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 23:11:33,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:11:33,279 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:33,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 120 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:11:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 23:11:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2023-03-31 23:11:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 23:11:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2023-03-31 23:11:33,327 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 21 [2023-03-31 23:11:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:33,328 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2023-03-31 23:11:33,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 23:11:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2023-03-31 23:11:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 23:11:33,330 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:33,331 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:33,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:11:33,536 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 [2023-03-31 23:11:33,538 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:33,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1981824872, now seen corresponding path program 1 times [2023-03-31 23:11:33,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:33,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078821781] [2023-03-31 23:11:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:33,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:33,575 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:33,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253199313] [2023-03-31 23:11:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:33,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:33,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:33,579 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) [2023-03-31 23:11:33,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:11:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:33,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 23:11:33,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:11:33,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:11:33,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:33,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078821781] [2023-03-31 23:11:33,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:33,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253199313] [2023-03-31 23:11:33,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253199313] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:11:33,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:11:33,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:11:33,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402666777] [2023-03-31 23:11:33,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:11:33,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:11:33,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:33,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:11:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:11:33,785 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 23:11:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:33,914 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-03-31 23:11:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:11:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2023-03-31 23:11:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:33,916 INFO L225 Difference]: With dead ends: 54 [2023-03-31 23:11:33,916 INFO L226 Difference]: Without dead ends: 51 [2023-03-31 23:11:33,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:11:33,918 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:33,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 107 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:11:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-03-31 23:11:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-03-31 23:11:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 23:11:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2023-03-31 23:11:33,928 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 26 [2023-03-31 23:11:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:33,929 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2023-03-31 23:11:33,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 23:11:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2023-03-31 23:11:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 23:11:33,930 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:33,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:33,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:11:34,135 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 [2023-03-31 23:11:34,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:34,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash -323255580, now seen corresponding path program 1 times [2023-03-31 23:11:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:34,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299501394] [2023-03-31 23:11:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:34,159 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:34,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090859488] [2023-03-31 23:11:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:34,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:34,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:34,163 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) [2023-03-31 23:11:34,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:11:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:34,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 23:11:34,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 23:11:35,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 23:11:35,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:35,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299501394] [2023-03-31 23:11:35,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:35,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090859488] [2023-03-31 23:11:35,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090859488] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 23:11:35,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:11:35,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-03-31 23:11:35,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490234624] [2023-03-31 23:11:35,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:11:35,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:11:35,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:11:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=149, Unknown=2, NotChecked=0, Total=182 [2023-03-31 23:11:35,346 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-03-31 23:11:35,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:35,422 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-03-31 23:11:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:11:35,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 33 [2023-03-31 23:11:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:35,425 INFO L225 Difference]: With dead ends: 56 [2023-03-31 23:11:35,425 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 23:11:35,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=173, Unknown=2, NotChecked=0, Total=210 [2023-03-31 23:11:35,428 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:35,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 81 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:11:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 23:11:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-03-31 23:11:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 23:11:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2023-03-31 23:11:35,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 33 [2023-03-31 23:11:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:35,456 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2023-03-31 23:11:35,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-03-31 23:11:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2023-03-31 23:11:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 23:11:35,458 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:35,459 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:35,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:11:35,664 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 [2023-03-31 23:11:35,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:35,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:35,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1792215940, now seen corresponding path program 1 times [2023-03-31 23:11:35,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:35,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778537605] [2023-03-31 23:11:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:35,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:35,699 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:35,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377096035] [2023-03-31 23:11:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:35,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:35,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:35,715 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) [2023-03-31 23:11:35,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:11:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:35,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 23:11:35,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 23:11:35,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:11:35,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:35,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778537605] [2023-03-31 23:11:35,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:35,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377096035] [2023-03-31 23:11:35,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377096035] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:11:35,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:11:35,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:11:35,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520061348] [2023-03-31 23:11:35,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:11:35,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:11:35,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:11:35,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:11:35,858 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-03-31 23:11:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:35,943 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-03-31 23:11:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:11:35,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2023-03-31 23:11:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:35,951 INFO L225 Difference]: With dead ends: 60 [2023-03-31 23:11:35,951 INFO L226 Difference]: Without dead ends: 58 [2023-03-31 23:11:35,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:11:35,956 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:35,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 116 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:11:35,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-03-31 23:11:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-03-31 23:11:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 23:11:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-03-31 23:11:35,973 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 43 [2023-03-31 23:11:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:35,973 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-03-31 23:11:35,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-03-31 23:11:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-03-31 23:11:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-03-31 23:11:35,976 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:35,976 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:35,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:11:36,180 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 [2023-03-31 23:11:36,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:36,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1685591713, now seen corresponding path program 1 times [2023-03-31 23:11:36,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:36,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432243309] [2023-03-31 23:11:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:36,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:36,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:36,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069066733] [2023-03-31 23:11:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:36,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:36,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:36,198 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) [2023-03-31 23:11:36,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:11:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:36,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:11:36,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 23:11:36,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 23:11:36,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:36,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432243309] [2023-03-31 23:11:36,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:36,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069066733] [2023-03-31 23:11:36,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069066733] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:11:36,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392361046] [2023-03-31 23:11:36,571 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-03-31 23:11:36,572 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:36,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:36,578 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:36,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:36,624 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:36,964 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:11:36,975 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:11:36,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:36,981 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:37,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1513#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:11:37,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:37,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:11:37,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-03-31 23:11:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307495465] [2023-03-31 23:11:37,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:37,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:11:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:11:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:11:37,543 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 14 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2023-03-31 23:11:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:37,788 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2023-03-31 23:11:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:11:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 49 [2023-03-31 23:11:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:37,791 INFO L225 Difference]: With dead ends: 76 [2023-03-31 23:11:37,791 INFO L226 Difference]: Without dead ends: 74 [2023-03-31 23:11:37,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:11:37,793 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:37,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 120 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:11:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-03-31 23:11:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2023-03-31 23:11:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-03-31 23:11:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2023-03-31 23:11:37,805 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 49 [2023-03-31 23:11:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:37,806 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2023-03-31 23:11:37,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2023-03-31 23:11:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2023-03-31 23:11:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-31 23:11:37,807 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:11:37,807 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:11:37,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:11:38,013 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 [2023-03-31 23:11:38,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:11:38,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:11:38,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1075151994, now seen corresponding path program 1 times [2023-03-31 23:11:38,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:11:38,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110356862] [2023-03-31 23:11:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:38,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:11:38,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:11:38,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010554089] [2023-03-31 23:11:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:11:38,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:11:38,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:11:38,032 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) [2023-03-31 23:11:38,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:11:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:11:38,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 23:11:38,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:11:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-03-31 23:11:38,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:11:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-03-31 23:11:38,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:11:38,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110356862] [2023-03-31 23:11:38,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:11:38,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010554089] [2023-03-31 23:11:38,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010554089] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:11:38,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370906775] [2023-03-31 23:11:38,582 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-03-31 23:11:38,582 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:11:38,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:11:38,582 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:11:38,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:11:38,627 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:11:39,130 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:11:39,135 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:11:39,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:11:39,142 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:11:39,657 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2095#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:11:39,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:11:39,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:11:39,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-03-31 23:11:39,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572174116] [2023-03-31 23:11:39,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:11:39,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-31 23:11:39,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:11:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-31 23:11:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 23:11:39,660 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2023-03-31 23:11:40,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:11:40,094 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2023-03-31 23:11:40,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:11:40,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) Word has length 56 [2023-03-31 23:11:40,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:11:40,095 INFO L225 Difference]: With dead ends: 109 [2023-03-31 23:11:40,095 INFO L226 Difference]: Without dead ends: 0 [2023-03-31 23:11:40,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2023-03-31 23:11:40,097 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:11:40,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 116 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:11:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-03-31 23:11:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-03-31 23:11:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-03-31 23:11:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-03-31 23:11:40,098 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2023-03-31 23:11:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:11:40,099 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-03-31 23:11:40,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 13 states have internal predecessors, (27), 9 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2023-03-31 23:11:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-03-31 23:11:40,099 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-03-31 23:11:40,101 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 23:11:40,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 23:11:40,306 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 [2023-03-31 23:11:40,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-03-31 23:11:40,807 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2023-03-31 23:11:40,808 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 8) no Hoare annotation was computed. [2023-03-31 23:11:40,808 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 13) the Hoare annotation is: true [2023-03-31 23:11:40,808 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2023-03-31 23:11:40,808 INFO L899 garLoopResultBuilder]: For program point L64(line 64) no Hoare annotation was computed. [2023-03-31 23:11:40,808 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2023-03-31 23:11:40,808 INFO L902 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2023-03-31 23:11:40,808 INFO L895 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 1)) [2023-03-31 23:11:40,808 INFO L902 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2023-03-31 23:11:40,808 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2023-03-31 23:11:40,808 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 22 66) no Hoare annotation was computed. [2023-03-31 23:11:40,808 INFO L899 garLoopResultBuilder]: For program point L50(lines 47 59) no Hoare annotation was computed. [2023-03-31 23:11:40,809 INFO L895 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2023-03-31 23:11:40,809 INFO L895 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2023-03-31 23:11:40,809 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 22 66) the Hoare annotation is: true [2023-03-31 23:11:40,809 INFO L899 garLoopResultBuilder]: For program point L40(lines 38 62) no Hoare annotation was computed. [2023-03-31 23:11:40,809 INFO L895 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2023-03-31 23:11:40,809 INFO L895 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (<= main_~y~0 1))) (or (and (= main_~x~0 main_~r~0) (= main_~q~0 0) .cse0 .cse1) (let ((.cse2 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse2) (+ main_~b~0 main_~x~0)) .cse0 (= main_~b~0 .cse2) .cse1)))) [2023-03-31 23:11:40,809 INFO L895 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2023-03-31 23:11:40,809 INFO L899 garLoopResultBuilder]: For program point L55-1(line 55) no Hoare annotation was computed. [2023-03-31 23:11:40,810 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2023-03-31 23:11:40,810 INFO L895 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= 1 main_~r~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2023-03-31 23:11:40,810 INFO L899 garLoopResultBuilder]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2023-03-31 23:11:40,810 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2023-03-31 23:11:40,810 INFO L895 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0 .cse0) (+ main_~b~0 main_~x~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2023-03-31 23:11:40,810 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 23:11:40,810 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-03-31 23:11:40,810 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-03-31 23:11:40,810 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-03-31 23:11:40,810 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-03-31 23:11:40,810 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 23:11:40,811 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-03-31 23:11:40,811 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-03-31 23:11:40,811 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-03-31 23:11:40,811 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-03-31 23:11:40,811 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-03-31 23:11:40,811 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-03-31 23:11:40,813 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-03-31 23:11:40,815 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 23:11:40,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 11:11:40 BoogieIcfgContainer [2023-03-31 23:11:40,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 23:11:40,829 INFO L158 Benchmark]: Toolchain (without parser) took 9061.84ms. Allocated memory was 312.5MB in the beginning and 375.4MB in the end (delta: 62.9MB). Free memory was 271.6MB in the beginning and 314.2MB in the end (delta: -42.7MB). Peak memory consumption was 210.8MB. Max. memory is 8.0GB. [2023-03-31 23:11:40,829 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 23:11:40,829 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.69ms. Allocated memory is still 312.5MB. Free memory was 271.2MB in the beginning and 260.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 23:11:40,830 INFO L158 Benchmark]: Boogie Preprocessor took 42.01ms. Allocated memory is still 312.5MB. Free memory was 260.8MB in the beginning and 259.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 23:11:40,830 INFO L158 Benchmark]: RCFGBuilder took 383.24ms. Allocated memory is still 312.5MB. Free memory was 259.0MB in the beginning and 246.8MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-03-31 23:11:40,830 INFO L158 Benchmark]: TraceAbstraction took 8367.87ms. Allocated memory was 312.5MB in the beginning and 375.4MB in the end (delta: 62.9MB). Free memory was 246.1MB in the beginning and 314.2MB in the end (delta: -68.2MB). Peak memory consumption was 185.6MB. Max. memory is 8.0GB. [2023-03-31 23:11:40,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 147.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 246.69ms. Allocated memory is still 312.5MB. Free memory was 271.2MB in the beginning and 260.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.01ms. Allocated memory is still 312.5MB. Free memory was 260.8MB in the beginning and 259.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 383.24ms. Allocated memory is still 312.5MB. Free memory was 259.0MB in the beginning and 246.8MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 8367.87ms. Allocated memory was 312.5MB in the beginning and 375.4MB in the end (delta: 62.9MB). Free memory was 246.1MB in the beginning and 314.2MB in the end (delta: -68.2MB). Peak memory consumption was 185.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 6, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 207 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 176 mSDsluCounter, 660 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 490 mSDsCounter, 138 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 910 IncrementalHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 138 mSolverCounterUnsat, 170 mSDtfsCounter, 910 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 478 GetRequests, 367 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=5, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 54 PreInvPairs, 81 NumberOfFragments, 267 HoareAnnotationTreeSize, 54 FomulaSimplifications, 670 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 18 FomulaSimplificationsInter, 610 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 357 ConstructedInterpolants, 3 QuantifiedInterpolants, 1329 SizeOfPredicates, 27 NumberOfNonLiveVariables, 721 ConjunctsInSsa, 125 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 335/354 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((1 <= r && q * y + r + a * y == b + x) && 1 <= y) && b == a * y) && y <= 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((q * y + r + a * y == b + x && 1 <= y) && b == a * y) && y <= 1 RESULT: Ultimate proved your program to be correct! [2023-03-31 23:11:40,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...