/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/ps2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 13:08:21,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 13:08:21,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 13:08:21,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 13:08:21,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 13:08:21,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 13:08:21,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 13:08:21,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 13:08:21,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 13:08:21,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 13:08:21,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 13:08:21,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 13:08:21,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 13:08:21,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 13:08:21,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 13:08:21,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 13:08:21,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 13:08:21,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 13:08:21,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 13:08:21,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 13:08:21,717 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 13:08:21,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 13:08:21,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 13:08:21,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 13:08:21,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 13:08:21,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 13:08:21,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 13:08:21,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 13:08:21,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 13:08:21,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 13:08:21,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 13:08:21,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 13:08:21,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 13:08:21,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 13:08:21,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 13:08:21,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 13:08:21,763 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 13:08:21,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 13:08:21,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 13:08:21,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 13:08:21,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 13:08:21,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 13:08:21,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 13:08:21,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 13:08:21,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 13:08:21,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 13:08:21,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 13:08:21,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 13:08:21,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 13:08:21,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:08:21,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 13:08:21,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 13:08:21,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 13:08:21,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 13:08:21,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 13:08:21,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 13:08:21,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 13:08:21,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 13:08:21,768 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 13:08:21,768 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 13:08:21,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 13:08:22,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 13:08:22,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 13:08:22,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 13:08:22,010 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 13:08:22,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound10.c [2022-04-06 13:08:22,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b6b544e/613f269e4a2044e5a627e4e7cd0378e1/FLAG5e6ac157f [2022-04-06 13:08:22,373 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 13:08:22,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound10.c [2022-04-06 13:08:22,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b6b544e/613f269e4a2044e5a627e4e7cd0378e1/FLAG5e6ac157f [2022-04-06 13:08:22,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b6b544e/613f269e4a2044e5a627e4e7cd0378e1 [2022-04-06 13:08:22,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 13:08:22,806 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 13:08:22,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 13:08:22,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 13:08:22,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 13:08:22,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:08:22" (1/1) ... [2022-04-06 13:08:22,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b56401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:22, skipping insertion in model container [2022-04-06 13:08:22,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:08:22" (1/1) ... [2022-04-06 13:08:22,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 13:08:22,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 13:08:23,020 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/ps2-ll_unwindbound10.c[454,467] [2022-04-06 13:08:23,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:08:23,041 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 13:08:23,049 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/ps2-ll_unwindbound10.c[454,467] [2022-04-06 13:08:23,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:08:23,061 INFO L208 MainTranslator]: Completed translation [2022-04-06 13:08:23,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23 WrapperNode [2022-04-06 13:08:23,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 13:08:23,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 13:08:23,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 13:08:23,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 13:08:23,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23" (1/1) ... [2022-04-06 13:08:23,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23" (1/1) ... [2022-04-06 13:08:23,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23" (1/1) ... [2022-04-06 13:08:23,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23" (1/1) ... [2022-04-06 13:08:23,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23" (1/1) ... [2022-04-06 13:08:23,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23" (1/1) ... [2022-04-06 13:08:23,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23" (1/1) ... [2022-04-06 13:08:23,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 13:08:23,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 13:08:23,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 13:08:23,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 13:08:23,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23" (1/1) ... [2022-04-06 13:08:23,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:08:23,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:23,121 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) [2022-04-06 13:08:23,145 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 [2022-04-06 13:08:23,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 13:08:23,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 13:08:23,160 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 13:08:23,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 13:08:23,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 13:08:23,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 13:08:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 13:08:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 13:08:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 13:08:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 13:08:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 13:08:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 13:08:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 13:08:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 13:08:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 13:08:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 13:08:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 13:08:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 13:08:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 13:08:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 13:08:23,227 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 13:08:23,229 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 13:08:23,327 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 13:08:23,335 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 13:08:23,335 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 13:08:23,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:08:23 BoogieIcfgContainer [2022-04-06 13:08:23,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 13:08:23,338 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 13:08:23,338 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 13:08:23,339 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 13:08:23,341 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:08:23" (1/1) ... [2022-04-06 13:08:23,342 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 13:08:23,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:08:23 BasicIcfg [2022-04-06 13:08:23,360 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 13:08:23,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 13:08:23,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 13:08:23,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 13:08:23,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 01:08:22" (1/4) ... [2022-04-06 13:08:23,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e708017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:08:23, skipping insertion in model container [2022-04-06 13:08:23,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:08:23" (2/4) ... [2022-04-06 13:08:23,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e708017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:08:23, skipping insertion in model container [2022-04-06 13:08:23,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:08:23" (3/4) ... [2022-04-06 13:08:23,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e708017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:08:23, skipping insertion in model container [2022-04-06 13:08:23,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:08:23" (4/4) ... [2022-04-06 13:08:23,389 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound10.cqvasr [2022-04-06 13:08:23,393 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 13:08:23,394 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 13:08:23,446 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 13:08:23,452 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=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 [2022-04-06 13:08:23,452 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 13:08:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 13:08:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 13:08:23,472 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:23,473 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:08:23,473 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:23,477 INFO L85 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2022-04-06 13:08:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:23,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183594848] [2022-04-06 13:08:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:23,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:23,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:08:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:08:23,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:23,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183594848] [2022-04-06 13:08:23,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183594848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:08:23,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:08:23,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 13:08:23,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370311191] [2022-04-06 13:08:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:08:23,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 13:08:23,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 13:08:23,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:08:23,644 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:08:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:23,713 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-04-06 13:08:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 13:08:23,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 13:08:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:23,721 INFO L225 Difference]: With dead ends: 39 [2022-04-06 13:08:23,721 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 13:08:23,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:08:23,730 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:23,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:08:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 13:08:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-04-06 13:08:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 13:08:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 13:08:23,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-06 13:08:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:23,760 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 13:08:23,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:08:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 13:08:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 13:08:23,762 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:23,762 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:08:23,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 13:08:23,762 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2022-04-06 13:08:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:23,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552325725] [2022-04-06 13:08:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:23,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:23,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575322328] [2022-04-06 13:08:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:23,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:23,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:23,782 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) [2022-04-06 13:08:23,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 13:08:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:23,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 13:08:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:08:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:08:23,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:08:23,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:23,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552325725] [2022-04-06 13:08:23,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:23,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575322328] [2022-04-06 13:08:23,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575322328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:08:23,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:08:23,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:08:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855603230] [2022-04-06 13:08:23,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:08:23,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:08:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:08:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:08:23,911 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:08:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:23,921 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-06 13:08:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:08:23,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 13:08:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:23,923 INFO L225 Difference]: With dead ends: 26 [2022-04-06 13:08:23,923 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 13:08:23,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:08:23,924 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:23,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:08:23,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 13:08:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 13:08:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 13:08:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 13:08:23,931 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-06 13:08:23,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:23,931 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 13:08:23,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:08:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 13:08:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 13:08:23,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:23,932 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:08:23,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 13:08:24,136 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 [2022-04-06 13:08:24,138 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:24,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:24,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2022-04-06 13:08:24,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:24,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938944182] [2022-04-06 13:08:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:24,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:24,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:24,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336381665] [2022-04-06 13:08:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:24,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:24,169 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) [2022-04-06 13:08:24,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 13:08:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:24,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 13:08:24,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:08:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:08:24,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:08:24,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:24,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938944182] [2022-04-06 13:08:24,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:24,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336381665] [2022-04-06 13:08:24,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336381665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:08:24,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:08:24,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 13:08:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914109855] [2022-04-06 13:08:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:08:24,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:08:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:24,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:08:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:08:24,304 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:08:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:24,357 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-06 13:08:24,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:08:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 13:08:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:24,359 INFO L225 Difference]: With dead ends: 28 [2022-04-06 13:08:24,359 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 13:08:24,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 13:08:24,361 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:24,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:08:24,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 13:08:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 13:08:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 13:08:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-06 13:08:24,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-06 13:08:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:24,366 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-06 13:08:24,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:08:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-06 13:08:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 13:08:24,367 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:24,367 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:08:24,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 13:08:24,568 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 [2022-04-06 13:08:24,568 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2022-04-06 13:08:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:24,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785761425] [2022-04-06 13:08:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:24,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:24,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:24,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229265732] [2022-04-06 13:08:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:24,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:24,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:24,582 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) [2022-04-06 13:08:24,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 13:08:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 13:08:24,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:08:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:08:24,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:08:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:08:24,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785761425] [2022-04-06 13:08:24,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229265732] [2022-04-06 13:08:24,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229265732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:08:24,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:08:24,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 13:08:24,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196236040] [2022-04-06 13:08:24,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:08:24,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 13:08:24,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:24,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 13:08:24,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 13:08:24,772 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 13:08:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:24,834 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-04-06 13:08:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 13:08:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-04-06 13:08:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:24,836 INFO L225 Difference]: With dead ends: 56 [2022-04-06 13:08:24,836 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 13:08:24,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 13:08:24,837 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:24,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 72 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:08:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 13:08:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-04-06 13:08:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 13:08:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-06 13:08:24,845 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2022-04-06 13:08:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:24,846 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-06 13:08:24,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 13:08:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-06 13:08:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 13:08:24,847 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:24,847 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:08:24,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 13:08:25,047 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 [2022-04-06 13:08:25,048 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2022-04-06 13:08:25,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:25,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459042203] [2022-04-06 13:08:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:25,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:25,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:25,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846101072] [2022-04-06 13:08:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:25,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:25,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:25,061 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) [2022-04-06 13:08:25,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 13:08:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:25,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 13:08:25,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:08:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:08:25,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:08:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 13:08:25,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:25,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459042203] [2022-04-06 13:08:25,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:25,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846101072] [2022-04-06 13:08:25,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846101072] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 13:08:25,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 13:08:25,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 13:08:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425617592] [2022-04-06 13:08:25,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:08:25,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:08:25,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:25,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:08:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 13:08:25,279 INFO L87 Difference]: Start difference. First operand 45 states and 51 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 13:08:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:25,299 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-04-06 13:08:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:08:25,300 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-06 13:08:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:25,300 INFO L225 Difference]: With dead ends: 45 [2022-04-06 13:08:25,300 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 13:08:25,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 13:08:25,302 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:25,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:08:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 13:08:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 13:08:25,303 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) [2022-04-06 13:08:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 13:08:25,303 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-04-06 13:08:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:25,307 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 13:08:25,310 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 13:08:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 13:08:25,310 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 13:08:25,312 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 13:08:25,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 13:08:25,531 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 [2022-04-06 13:08:25,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 13:08:25,585 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 13:08:25,585 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 13:08:25,585 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 13:08:25,585 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 13:08:25,585 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-06 13:08:25,586 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 13:08:25,586 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 13:08:25,586 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 18 40) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-04-06 13:08:25,586 INFO L878 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))) [2022-04-06 13:08:25,586 INFO L878 garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))) [2022-04-06 13:08:25,586 INFO L882 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2022-04-06 13:08:25,586 INFO L882 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2022-04-06 13:08:25,586 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0)))) [2022-04-06 13:08:25,586 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 40) no Hoare annotation was computed. [2022-04-06 13:08:25,587 INFO L882 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2022-04-06 13:08:25,587 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 40) no Hoare annotation was computed. [2022-04-06 13:08:25,587 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-04-06 13:08:25,587 INFO L882 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2022-04-06 13:08:25,587 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2022-04-06 13:08:25,587 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2022-04-06 13:08:25,587 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2022-04-06 13:08:25,587 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2022-04-06 13:08:25,590 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-04-06 13:08:25,591 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 13:08:25,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:08:25 BasicIcfg [2022-04-06 13:08:25,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 13:08:25,603 INFO L158 Benchmark]: Toolchain (without parser) took 2796.70ms. Allocated memory was 188.7MB in the beginning and 304.1MB in the end (delta: 115.3MB). Free memory was 130.8MB in the beginning and 228.4MB in the end (delta: -97.6MB). Peak memory consumption was 18.8MB. Max. memory is 8.0GB. [2022-04-06 13:08:25,603 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 146.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 13:08:25,603 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.03ms. Allocated memory was 188.7MB in the beginning and 304.1MB in the end (delta: 115.3MB). Free memory was 130.7MB in the beginning and 275.0MB in the end (delta: -144.3MB). Peak memory consumption was 6.6MB. Max. memory is 8.0GB. [2022-04-06 13:08:25,604 INFO L158 Benchmark]: Boogie Preprocessor took 22.12ms. Allocated memory is still 304.1MB. Free memory was 275.0MB in the beginning and 273.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 13:08:25,604 INFO L158 Benchmark]: RCFGBuilder took 251.26ms. Allocated memory is still 304.1MB. Free memory was 273.3MB in the beginning and 263.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 13:08:25,604 INFO L158 Benchmark]: IcfgTransformer took 22.16ms. Allocated memory is still 304.1MB. Free memory was 263.9MB in the beginning and 262.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 13:08:25,605 INFO L158 Benchmark]: TraceAbstraction took 2240.83ms. Allocated memory is still 304.1MB. Free memory was 262.1MB in the beginning and 228.4MB in the end (delta: 33.7MB). Peak memory consumption was 35.2MB. Max. memory is 8.0GB. [2022-04-06 13:08:25,606 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 146.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 255.03ms. Allocated memory was 188.7MB in the beginning and 304.1MB in the end (delta: 115.3MB). Free memory was 130.7MB in the beginning and 275.0MB in the end (delta: -144.3MB). Peak memory consumption was 6.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.12ms. Allocated memory is still 304.1MB. Free memory was 275.0MB in the beginning and 273.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 251.26ms. Allocated memory is still 304.1MB. Free memory was 273.3MB in the beginning and 263.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 22.16ms. Allocated memory is still 304.1MB. Free memory was 263.9MB in the beginning and 262.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2240.83ms. Allocated memory is still 304.1MB. Free memory was 262.1MB in the beginning and 228.4MB in the end (delta: 33.7MB). Peak memory consumption was 35.2MB. 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: 12]: 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 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 53 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52 mSDsluCounter, 240 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 151 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 76 IncrementalHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 89 mSDtfsCounter, 76 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, InterpolantAutomatonStates: 27, 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, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 32 NumberOfFragments, 65 HoareAnnotationTreeSize, 19 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 59 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 317 SizeOfPredicates, 5 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 11/18 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: 27]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || x * 2 == y + y * y RESULT: Ultimate proved your program to be correct! [2022-04-06 13:08:25,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...