/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 01:56:41,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 01:56:41,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 01:56:41,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 01:56:41,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 01:56:41,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 01:56:41,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 01:56:41,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 01:56:41,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 01:56:41,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 01:56:41,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 01:56:41,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 01:56:41,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 01:56:41,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 01:56:41,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 01:56:41,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 01:56:41,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 01:56:41,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 01:56:41,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 01:56:41,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 01:56:41,503 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 01:56:41,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 01:56:41,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 01:56:41,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 01:56:41,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 01:56:41,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 01:56:41,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 01:56:41,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 01:56:41,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 01:56:41,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 01:56:41,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 01:56:41,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 01:56:41,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 01:56:41,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 01:56:41,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 01:56:41,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 01:56:41,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 01:56:41,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 01:56:41,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 01:56:41,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 01:56:41,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 01:56:41,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 01:56:41,526 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 01:56:41,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 01:56:41,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 01:56:41,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 01:56:41,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 01:56:41,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 01:56:41,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 01:56:41,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 01:56:41,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 01:56:41,563 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 01:56:41,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 01:56:41,564 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 01:56:41,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 01:56:41,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 01:56:41,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 01:56:41,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 01:56:41,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 01:56:41,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 01:56:41,565 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 01:56:41,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 01:56:41,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 01:56:41,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 01:56:41,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 01:56:41,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 01:56:41,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 01:56:41,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:56:41,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 01:56:41,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 01:56:41,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 01:56:41,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 01:56:41,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 01:56:41,566 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 01:56:41,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 01:56:41,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 01:56:41,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 01:56:41,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 01:56:41,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 01:56:41,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 01:56:41,805 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 01:56:41,805 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 01:56:41,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c [2022-03-20 01:56:41,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80170d24/4d4cdec6089a416bab8e3e12ca322571/FLAG83d409d09 [2022-03-20 01:56:42,172 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 01:56:42,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c [2022-03-20 01:56:42,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80170d24/4d4cdec6089a416bab8e3e12ca322571/FLAG83d409d09 [2022-03-20 01:56:42,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e80170d24/4d4cdec6089a416bab8e3e12ca322571 [2022-03-20 01:56:42,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 01:56:42,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 01:56:42,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 01:56:42,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 01:56:42,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 01:56:42,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22968ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42, skipping insertion in model container [2022-03-20 01:56:42,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 01:56:42,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 01:56:42,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c[524,537] [2022-03-20 01:56:42,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:56:42,766 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 01:56:42,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c[524,537] [2022-03-20 01:56:42,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:56:42,787 INFO L208 MainTranslator]: Completed translation [2022-03-20 01:56:42,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42 WrapperNode [2022-03-20 01:56:42,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 01:56:42,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 01:56:42,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 01:56:42,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 01:56:42,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 01:56:42,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 01:56:42,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 01:56:42,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 01:56:42,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42" (1/1) ... [2022-03-20 01:56:42,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:56:42,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:56:42,845 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) [2022-03-20 01:56:42,861 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 [2022-03-20 01:56:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 01:56:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 01:56:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 01:56:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 01:56:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 01:56:42,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 01:56:42,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 01:56:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 01:56:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 01:56:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 01:56:42,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 01:56:42,927 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 01:56:42,928 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 01:56:43,046 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 01:56:43,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 01:56:43,052 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 01:56:43,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:56:43 BoogieIcfgContainer [2022-03-20 01:56:43,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 01:56:43,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 01:56:43,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 01:56:43,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 01:56:43,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:56:42" (1/3) ... [2022-03-20 01:56:43,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201cc79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:56:43, skipping insertion in model container [2022-03-20 01:56:43,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:56:42" (2/3) ... [2022-03-20 01:56:43,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201cc79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:56:43, skipping insertion in model container [2022-03-20 01:56:43,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:56:43" (3/3) ... [2022-03-20 01:56:43,060 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound50.c [2022-03-20 01:56:43,064 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 01:56:43,064 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 01:56:43,100 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 01:56:43,105 INFO L340 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=PETRI_NET, 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 [2022-03-20 01:56:43,105 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 01:56:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 01:56:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 01:56:43,123 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:56:43,124 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:56:43,124 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:56:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:56:43,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 1 times [2022-03-20 01:56:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:56:43,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546880799] [2022-03-20 01:56:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:56:43,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:56:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:56:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:56:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:56:43,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 01:56:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:56:43,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 01:56:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:56:43,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 01:56:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:56:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:56:43,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:56:43,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546880799] [2022-03-20 01:56:43,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546880799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:56:43,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:56:43,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 01:56:43,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555297206] [2022-03-20 01:56:43,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:56:43,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 01:56:43,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:56:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 01:56:43,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 01:56:43,375 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:56:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:56:43,424 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2022-03-20 01:56:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 01:56:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 01:56:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:56:43,431 INFO L225 Difference]: With dead ends: 61 [2022-03-20 01:56:43,431 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 01:56:43,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 01:56:43,435 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:56:43,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:56:43,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 01:56:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 01:56:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 01:56:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-20 01:56:43,464 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2022-03-20 01:56:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:56:43,464 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-20 01:56:43,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:56:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-20 01:56:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 01:56:43,466 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:56:43,466 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:56:43,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 01:56:43,467 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:56:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:56:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 1 times [2022-03-20 01:56:43,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:56:43,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84420694] [2022-03-20 01:56:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:56:43,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:56:43,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:56:43,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447627186] [2022-03-20 01:56:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:56:43,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:56:43,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:56:43,495 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) [2022-03-20 01:56:43,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 01:56:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:56:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 01:56:43,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:56:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 01:56:43,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:56:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:56:43,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:56:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84420694] [2022-03-20 01:56:43,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:56:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447627186] [2022-03-20 01:56:43,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447627186] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 01:56:43,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 01:56:43,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 01:56:43,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403538694] [2022-03-20 01:56:43,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:56:43,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:56:43,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:56:43,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:56:43,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:56:43,873 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 01:56:44,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:56:44,033 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-03-20 01:56:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:56:44,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 01:56:44,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:56:44,034 INFO L225 Difference]: With dead ends: 35 [2022-03-20 01:56:44,034 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 01:56:44,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:56:44,036 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:56:44,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:56:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 01:56:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 01:56:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 01:56:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-03-20 01:56:44,041 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 28 [2022-03-20 01:56:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:56:44,042 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-03-20 01:56:44,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 01:56:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-03-20 01:56:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 01:56:44,043 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:56:44,043 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:56:44,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 01:56:44,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:56:44,245 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:56:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:56:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 1 times [2022-03-20 01:56:44,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:56:44,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223265064] [2022-03-20 01:56:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:56:44,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:56:44,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:56:44,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104366627] [2022-03-20 01:56:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:56:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:56:44,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:56:44,278 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) [2022-03-20 01:56:44,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 01:56:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:56:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 01:56:44,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:56:44,446 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 01:56:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 01:56:44,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:56:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:56:44,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:56:44,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223265064] [2022-03-20 01:56:44,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:56:44,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104366627] [2022-03-20 01:56:44,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104366627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:56:44,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:56:44,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 01:56:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747105381] [2022-03-20 01:56:44,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:56:44,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 01:56:44,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:56:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 01:56:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-20 01:56:44,925 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 01:56:47,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:56:49,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:56:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:56:49,672 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-03-20 01:56:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 01:56:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 34 [2022-03-20 01:56:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:56:49,674 INFO L225 Difference]: With dead ends: 49 [2022-03-20 01:56:49,674 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 01:56:49,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-03-20 01:56:49,675 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 01:56:49,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 134 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 187 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 01:56:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 01:56:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-20 01:56:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 01:56:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-20 01:56:49,681 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 34 [2022-03-20 01:56:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:56:49,681 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-20 01:56:49,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 01:56:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-20 01:56:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 01:56:49,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:56:49,682 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2022-03-20 01:56:49,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 01:56:49,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 01:56:49,899 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:56:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:56:49,899 INFO L85 PathProgramCache]: Analyzing trace with hash -624978355, now seen corresponding path program 1 times [2022-03-20 01:56:49,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:56:49,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966064322] [2022-03-20 01:56:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:56:49,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:56:49,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:56:49,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116538985] [2022-03-20 01:56:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:56:49,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:56:49,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:56:49,912 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) [2022-03-20 01:56:49,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 01:56:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:56:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 01:56:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:56:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:56:50,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:56:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 01:56:50,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:56:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966064322] [2022-03-20 01:56:50,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:56:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116538985] [2022-03-20 01:56:50,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116538985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:56:50,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:56:50,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-03-20 01:56:50,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350267641] [2022-03-20 01:56:50,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:56:50,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 01:56:50,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:56:50,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 01:56:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 01:56:50,367 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-03-20 01:56:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:56:50,445 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-03-20 01:56:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 01:56:50,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 47 [2022-03-20 01:56:50,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:56:50,447 INFO L225 Difference]: With dead ends: 51 [2022-03-20 01:56:50,447 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 01:56:50,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 01:56:50,448 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:56:50,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 189 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:56:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 01:56:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-03-20 01:56:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 01:56:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-20 01:56:50,453 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 47 [2022-03-20 01:56:50,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:56:50,453 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-20 01:56:50,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2022-03-20 01:56:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-20 01:56:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 01:56:50,454 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:56:50,454 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2022-03-20 01:56:50,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 01:56:50,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:56:50,672 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:56:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:56:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2091386113, now seen corresponding path program 1 times [2022-03-20 01:56:50,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:56:50,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341451427] [2022-03-20 01:56:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:56:50,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:56:50,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:56:50,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695096864] [2022-03-20 01:56:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:56:50,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:56:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:56:50,683 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) [2022-03-20 01:56:50,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 01:56:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:56:50,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 01:56:50,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:56:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 01:56:50,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:56:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 01:56:50,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:56:50,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341451427] [2022-03-20 01:56:50,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:56:50,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695096864] [2022-03-20 01:56:50,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695096864] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 01:56:50,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 01:56:50,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 01:56:50,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970822350] [2022-03-20 01:56:50,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:56:50,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:56:50,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:56:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:56:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:56:50,964 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 01:56:51,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:56:51,092 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-03-20 01:56:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:56:51,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-03-20 01:56:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:56:51,093 INFO L225 Difference]: With dead ends: 38 [2022-03-20 01:56:51,093 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 01:56:51,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 01:56:51,094 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:56:51,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 119 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:56:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 01:56:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 01:56:51,095 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) [2022-03-20 01:56:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 01:56:51,095 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2022-03-20 01:56:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:56:51,096 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 01:56:51,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 01:56:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 01:56:51,096 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 01:56:51,098 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 01:56:51,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 01:56:51,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:56:51,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 01:56:58,961 WARN L232 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 47 DAG size of output: 19 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 01:57:13,020 WARN L232 SmtUtils]: Spent 14.06s on a formula simplification. DAG size of input: 47 DAG size of output: 19 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 01:57:13,133 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-20 01:57:13,133 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-20 01:57:13,133 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-20 01:57:13,133 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-20 01:57:13,133 INFO L882 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-03-20 01:57:13,134 INFO L882 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-03-20 01:57:13,134 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-03-20 01:57:13,134 INFO L882 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2022-03-20 01:57:13,134 INFO L882 garLoopResultBuilder]: For program point L58(line 58) no Hoare annotation was computed. [2022-03-20 01:57:13,134 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 19 60) no Hoare annotation was computed. [2022-03-20 01:57:13,134 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 19 60) no Hoare annotation was computed. [2022-03-20 01:57:13,134 INFO L882 garLoopResultBuilder]: For program point L44(lines 44 54) no Hoare annotation was computed. [2022-03-20 01:57:13,134 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 54) no Hoare annotation was computed. [2022-03-20 01:57:13,134 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 55) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50) (<= 0 main_~a~0) (= main_~q~0 (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-20 01:57:13,134 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 60) the Hoare annotation is: true [2022-03-20 01:57:13,134 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50)) [2022-03-20 01:57:13,135 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50)) [2022-03-20 01:57:13,135 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50) (<= 0 main_~a~0) (= main_~q~0 (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-20 01:57:13,135 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-20 01:57:13,135 INFO L882 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-03-20 01:57:13,135 INFO L882 garLoopResultBuilder]: For program point L47(lines 47 54) no Hoare annotation was computed. [2022-03-20 01:57:13,135 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (and (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= main_~x~0 50) (<= 0 main_~a~0) (<= 1 main_~y~0)) [2022-03-20 01:57:13,135 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= main_~x~0 50) (<= 0 main_~a~0) (<= 1 main_~y~0)) [2022-03-20 01:57:13,135 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 34 55) no Hoare annotation was computed. [2022-03-20 01:57:13,135 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 01:57:13,135 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 01:57:13,136 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 01:57:13,136 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 01:57:13,136 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 01:57:13,136 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 01:57:13,136 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 01:57:13,136 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-20 01:57:13,136 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-03-20 01:57:13,136 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-03-20 01:57:13,136 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-03-20 01:57:13,136 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-03-20 01:57:13,136 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-03-20 01:57:13,141 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-03-20 01:57:13,143 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 01:57:13,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 01:57:13 BoogieIcfgContainer [2022-03-20 01:57:13,154 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 01:57:13,154 INFO L158 Benchmark]: Toolchain (without parser) took 30566.08ms. Allocated memory was 181.4MB in the beginning and 255.9MB in the end (delta: 74.4MB). Free memory was 121.4MB in the beginning and 205.3MB in the end (delta: -83.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 01:57:13,154 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 181.4MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 01:57:13,155 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.98ms. Allocated memory was 181.4MB in the beginning and 255.9MB in the end (delta: 74.4MB). Free memory was 121.1MB in the beginning and 225.8MB in the end (delta: -104.7MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. [2022-03-20 01:57:13,156 INFO L158 Benchmark]: Boogie Preprocessor took 24.27ms. Allocated memory is still 255.9MB. Free memory was 225.8MB in the beginning and 224.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 01:57:13,157 INFO L158 Benchmark]: RCFGBuilder took 240.04ms. Allocated memory is still 255.9MB. Free memory was 224.2MB in the beginning and 211.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 01:57:13,157 INFO L158 Benchmark]: TraceAbstraction took 30099.15ms. Allocated memory is still 255.9MB. Free memory was 211.1MB in the beginning and 205.3MB in the end (delta: 5.9MB). Peak memory consumption was 6.9MB. Max. memory is 8.0GB. [2022-03-20 01:57:13,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 181.4MB. Free memory is still 137.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.98ms. Allocated memory was 181.4MB in the beginning and 255.9MB in the end (delta: 74.4MB). Free memory was 121.1MB in the beginning and 225.8MB in the end (delta: -104.7MB). Peak memory consumption was 10.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.27ms. Allocated memory is still 255.9MB. Free memory was 225.8MB in the beginning and 224.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 240.04ms. Allocated memory is still 255.9MB. Free memory was 224.2MB in the beginning and 211.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 30099.15ms. Allocated memory is still 255.9MB. Free memory was 211.1MB in the beginning and 205.3MB in the end (delta: 5.9MB). Peak memory consumption was 6.9MB. 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: 14]: 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: 30.0s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 21.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 4.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 572 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 432 mSDsCounter, 58 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 346 IncrementalHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 58 mSolverCounterUnsat, 140 mSDtfsCounter, 346 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 337 GetRequests, 280 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 27 PreInvPairs, 37 NumberOfFragments, 119 HoareAnnotationTreeSize, 27 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 13 FomulaSimplificationsInter, 438 FormulaSimplificationTreeSizeReductionInter, 21.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 333 ConstructedInterpolants, 0 QuantifiedInterpolants, 957 SizeOfPredicates, 18 NumberOfNonLiveVariables, 459 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 173/196 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: 34]: Loop Invariant Derived loop invariant: (((0 <= x && q + b * a * p == y * x) && x <= 50) && 0 <= a) && 1 <= y RESULT: Ultimate proved your program to be correct! [2022-03-20 01:57:13,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...