/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:58:49,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:58:49,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:58:49,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:58:49,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:58:49,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:58:49,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:58:49,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:58:49,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:58:49,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:58:49,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:58:49,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:58:49,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:58:49,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:58:49,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:58:49,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:58:49,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:58:49,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:58:49,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:58:49,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:58:49,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:58:49,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:58:49,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:58:49,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:58:49,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-23 22:58:49,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-23 22:58:49,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-23 22:58:49,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-23 22:58:49,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-23 22:58:49,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-02-23 22:58:49,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:58:49,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:58:49,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:58:49,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:58:49,273 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:58:49,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:58:49,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:58:49,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:58:49,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:58:49,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:58:49,275 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:58:49,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:58:49,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:58:49,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:58:49,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:58:49,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:58:49,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:58:49,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:58:49,277 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:58:49,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:58:49,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:58:49,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:58:49,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:58:49,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:58:49,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:58:49,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:58:49,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:58:49,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:58:49,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:58:49,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:58:49,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:58:49,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:58:49,280 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:58:49,280 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:58:49,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:58:49,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:58:49,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:58:49,485 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:58:49,487 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:58:49,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound20.c [2022-02-23 22:58:49,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f617c464/06f29472d3834681831362215794328d/FLAGf134c99d9 [2022-02-23 22:58:49,920 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:58:49,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound20.c [2022-02-23 22:58:49,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f617c464/06f29472d3834681831362215794328d/FLAGf134c99d9 [2022-02-23 22:58:50,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f617c464/06f29472d3834681831362215794328d [2022-02-23 22:58:50,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:58:50,336 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:58:50,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:58:50,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:58:50,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:58:50,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d6d9b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50, skipping insertion in model container [2022-02-23 22:58:50,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:58:50,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:58:50,529 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/geo1-ll_valuebound20.c[546,559] [2022-02-23 22:58:50,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:58:50,568 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:58:50,578 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/geo1-ll_valuebound20.c[546,559] [2022-02-23 22:58:50,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:58:50,602 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:58:50,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50 WrapperNode [2022-02-23 22:58:50,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:58:50,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:58:50,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:58:50,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:58:50,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:58:50,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:58:50,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:58:50,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:58:50,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:58:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:58:50,672 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) [2022-02-23 22:58:50,699 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 [2022-02-23 22:58:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:58:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:58:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:58:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:58:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:58:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:58:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:58:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:58:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:58:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:58:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 22:58:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:58:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:58:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:58:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:58:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:58:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:58:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:58:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:58:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:58:50,778 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:58:50,780 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:58:50,933 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:58:50,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:58:50,939 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 22:58:50,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:58:50 BoogieIcfgContainer [2022-02-23 22:58:50,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:58:50,941 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:58:50,941 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:58:50,956 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:58:50,959 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:58:50" (1/1) ... [2022-02-23 22:58:50,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:58:50 BasicIcfg [2022-02-23 22:58:50,973 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:58:50,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:58:50,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:58:50,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:58:50,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:58:50" (1/4) ... [2022-02-23 22:58:50,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa546d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:58:50, skipping insertion in model container [2022-02-23 22:58:50,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:58:50" (2/4) ... [2022-02-23 22:58:50,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa546d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:58:50, skipping insertion in model container [2022-02-23 22:58:50,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:58:50" (3/4) ... [2022-02-23 22:58:50,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa546d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:58:50, skipping insertion in model container [2022-02-23 22:58:50,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:58:50" (4/4) ... [2022-02-23 22:58:50,980 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_valuebound20.cqvasr [2022-02-23 22:58:50,984 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:58:50,984 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:58:51,040 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:58:51,050 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:58:51,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:58:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-02-23 22:58:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 22:58:51,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:58:51,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:58:51,073 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:58:51,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:58:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1950279688, now seen corresponding path program 1 times [2022-02-23 22:58:51,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:58:51,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763329283] [2022-02-23 22:58:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:58:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:58:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:58:51,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:58:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:58:51,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:58:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:58:51,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 22:58:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:58:51,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 22:58:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:58:51,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 22:58:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:58:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:58:51,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:58:51,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763329283] [2022-02-23 22:58:51,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763329283] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:58:51,345 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:58:51,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:58:51,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615406334] [2022-02-23 22:58:51,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:58:51,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:58:51,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:58:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:58:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:58:51,381 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:58:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:58:51,461 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-02-23 22:58:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:58:51,464 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-23 22:58:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:58:51,470 INFO L225 Difference]: With dead ends: 57 [2022-02-23 22:58:51,470 INFO L226 Difference]: Without dead ends: 27 [2022-02-23 22:58:51,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:58:51,476 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 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 [2022-02-23 22:58:51,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:58:51,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-23 22:58:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-23 22:58:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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) [2022-02-23 22:58:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-23 22:58:51,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2022-02-23 22:58:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:58:51,510 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-23 22:58:51,510 INFO L471 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:58:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-23 22:58:51,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 22:58:51,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:58:51,512 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:58:51,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:58:51,513 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:58:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:58:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1010552682, now seen corresponding path program 1 times [2022-02-23 22:58:51,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:58:51,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035861079] [2022-02-23 22:58:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:58:51,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:58:51,533 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:58:51,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590746465] [2022-02-23 22:58:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:58:51,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:58:51,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:58:51,539 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) [2022-02-23 22:58:51,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:58:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:58:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:58:51,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:58:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:58:51,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:58:51,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:58:51,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035861079] [2022-02-23 22:58:51,771 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:58:51,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590746465] [2022-02-23 22:58:51,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590746465] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:58:51,771 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:58:51,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:58:51,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453859364] [2022-02-23 22:58:51,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:58:51,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:58:51,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:58:51,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:58:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:58:51,774 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:58:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:58:51,825 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-02-23 22:58:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:58:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-02-23 22:58:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:58:51,827 INFO L225 Difference]: With dead ends: 37 [2022-02-23 22:58:51,827 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 22:58:51,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:58:51,829 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:58:51,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 104 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:58:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 22:58:51,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-02-23 22:58:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 22:58:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-02-23 22:58:51,837 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2022-02-23 22:58:51,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:58:51,839 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-02-23 22:58:51,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:58:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-02-23 22:58:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 22:58:51,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:58:51,840 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-02-23 22:58:51,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 22:58:52,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:58:52,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:58:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:58:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1070211269, now seen corresponding path program 1 times [2022-02-23 22:58:52,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:58:52,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847352220] [2022-02-23 22:58:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:58:52,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:58:52,083 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:58:52,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839102461] [2022-02-23 22:58:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:58:52,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:58:52,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:58:52,087 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) [2022-02-23 22:58:52,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:58:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:58:52,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 22:58:52,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:58:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:58:52,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:58:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:58:52,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:58:52,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847352220] [2022-02-23 22:58:52,645 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:58:52,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839102461] [2022-02-23 22:58:52,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839102461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:58:52,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:58:52,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-23 22:58:52,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457772291] [2022-02-23 22:58:52,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:58:52,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 22:58:52,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:58:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 22:58:52,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:58:52,650 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-23 22:58:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:58:52,718 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-02-23 22:58:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:58:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2022-02-23 22:58:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:58:52,721 INFO L225 Difference]: With dead ends: 33 [2022-02-23 22:58:52,721 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 22:58:52,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:58:52,727 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:58:52,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-02-23 22:58:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 22:58:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 22:58:52,731 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) [2022-02-23 22:58:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 22:58:52,731 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2022-02-23 22:58:52,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:58:52,731 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 22:58:52,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-23 22:58:52,731 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 22:58:52,732 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 22:58:52,734 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 22:58:52,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 22:58:52,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 22:58:52,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 22:58:52,990 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-23 22:58:52,990 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 22:58:52,990 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 22:58:52,990 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 22:58:52,990 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-23 22:58:52,991 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 22:58:52,991 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 22:58:52,991 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2022-02-23 22:58:52,991 INFO L858 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2022-02-23 22:58:52,993 INFO L858 garLoopResultBuilder]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2022-02-23 22:58:52,993 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2022-02-23 22:58:52,996 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 22 52) the Hoare annotation is: true [2022-02-23 22:58:52,997 INFO L861 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-02-23 22:58:52,997 INFO L858 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2022-02-23 22:58:52,998 INFO L861 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: true [2022-02-23 22:58:52,998 INFO L861 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: true [2022-02-23 22:58:52,998 INFO L861 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-02-23 22:58:52,998 INFO L858 garLoopResultBuilder]: For program point L30(line 30) no Hoare annotation was computed. [2022-02-23 22:58:52,998 INFO L854 garLoopResultBuilder]: At program point L36-2(lines 36 46) the Hoare annotation is: (= (+ (* main_~z~0 main_~x~0) 1) (+ main_~y~0 main_~x~0)) [2022-02-23 22:58:52,998 INFO L858 garLoopResultBuilder]: For program point L36-3(lines 36 46) no Hoare annotation was computed. [2022-02-23 22:58:52,998 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (= (+ (* main_~z~0 main_~x~0) 1) (+ main_~y~0 main_~x~0)) [2022-02-23 22:58:52,999 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (= (+ main_~x~0 1) main_~y~0) [2022-02-23 22:58:52,999 INFO L858 garLoopResultBuilder]: For program point L37-1(lines 36 46) no Hoare annotation was computed. [2022-02-23 22:58:52,999 INFO L858 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2022-02-23 22:58:52,999 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 22 52) no Hoare annotation was computed. [2022-02-23 22:58:52,999 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 22 52) no Hoare annotation was computed. [2022-02-23 22:58:52,999 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2022-02-23 22:58:52,999 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 19) no Hoare annotation was computed. [2022-02-23 22:58:52,999 INFO L858 garLoopResultBuilder]: For program point L17(lines 17 18) no Hoare annotation was computed. [2022-02-23 22:58:53,000 INFO L858 garLoopResultBuilder]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2022-02-23 22:58:53,000 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2022-02-23 22:58:53,000 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2022-02-23 22:58:53,004 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-23 22:58:53,005 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 22:58:53,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:58:53 BasicIcfg [2022-02-23 22:58:53,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 22:58:53,020 INFO L158 Benchmark]: Toolchain (without parser) took 2683.64ms. Allocated memory was 172.0MB in the beginning and 231.7MB in the end (delta: 59.8MB). Free memory was 115.2MB in the beginning and 178.8MB in the end (delta: -63.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 22:58:53,020 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 172.0MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 22:58:53,021 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.76ms. Allocated memory was 172.0MB in the beginning and 231.7MB in the end (delta: 59.8MB). Free memory was 114.9MB in the beginning and 203.4MB in the end (delta: -88.5MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-02-23 22:58:53,022 INFO L158 Benchmark]: Boogie Preprocessor took 36.29ms. Allocated memory is still 231.7MB. Free memory was 203.4MB in the beginning and 201.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 22:58:53,022 INFO L158 Benchmark]: RCFGBuilder took 297.11ms. Allocated memory is still 231.7MB. Free memory was 201.9MB in the beginning and 191.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-23 22:58:53,025 INFO L158 Benchmark]: IcfgTransformer took 32.37ms. Allocated memory is still 231.7MB. Free memory was 191.9MB in the beginning and 190.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 22:58:53,025 INFO L158 Benchmark]: TraceAbstraction took 2044.73ms. Allocated memory is still 231.7MB. Free memory was 189.8MB in the beginning and 178.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 22:58:53,032 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 172.0MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 264.76ms. Allocated memory was 172.0MB in the beginning and 231.7MB in the end (delta: 59.8MB). Free memory was 114.9MB in the beginning and 203.4MB in the end (delta: -88.5MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.29ms. Allocated memory is still 231.7MB. Free memory was 203.4MB in the beginning and 201.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 297.11ms. Allocated memory is still 231.7MB. Free memory was 201.9MB in the beginning and 191.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 32.37ms. Allocated memory is still 231.7MB. Free memory was 191.9MB in the beginning and 190.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 2044.73ms. Allocated memory is still 231.7MB. Free memory was 189.8MB in the beginning and 178.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. 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: 18]: 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 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.0s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 268 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 6 IncrementalHoareTripleChecker+Unchecked, 187 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 81 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=2, InterpolantAutomatonStates: 14, 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 23 PreInvPairs, 31 NumberOfFragments, 39 HoareAnnotationTreeSize, 23 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 13 FomulaSimplificationsInter, 34 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 142 ConstructedInterpolants, 1 QuantifiedInterpolants, 246 SizeOfPredicates, 4 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 98/100 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: 36]: Loop Invariant Derived loop invariant: z * x + 1 == y + x RESULT: Ultimate proved your program to be correct! [2022-02-23 22:58:53,073 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...