/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/bresenham-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:35:53,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:35:53,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:35:53,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:35:53,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:35:53,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:35:53,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:35:53,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:35:53,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:35:53,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:35:53,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:35:53,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:35:53,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:35:53,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:35:53,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:35:53,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:35:53,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:35:53,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:35:53,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:35:53,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:35:53,157 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:35:53,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:35:53,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:35:53,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:35:53,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:35:53,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 20:35:53,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:35:53,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:35:53,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:35:53,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:35:53,190 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:35:53,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:35:53,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:35:53,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:35:53,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:35:53,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:35:53,196 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:35:53,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:35:53,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:35:53,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:35:53,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:35:53,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:35:53,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:35:53,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:35:53,197 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:35:53,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:35:53,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:35:53,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:35:53,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:35:53,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:35:53,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:35:53,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:35:53,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:35:53,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:35:53,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:35:53,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:35:53,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:35:53,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:35:53,199 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:35:53,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:35:53,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:35:53,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:35:53,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:35:53,369 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:35:53,370 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:35:53,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c [2022-03-17 20:35:53,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f691a2906/0695af8d14b245d9a12f7aaeca7ad191/FLAG9a192cde2 [2022-03-17 20:35:53,787 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:35:53,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c [2022-03-17 20:35:53,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f691a2906/0695af8d14b245d9a12f7aaeca7ad191/FLAG9a192cde2 [2022-03-17 20:35:54,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f691a2906/0695af8d14b245d9a12f7aaeca7ad191 [2022-03-17 20:35:54,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:35:54,228 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:35:54,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:35:54,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:35:54,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:35:54,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3436a469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54, skipping insertion in model container [2022-03-17 20:35:54,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:35:54,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:35:54,390 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/bresenham-ll_valuebound1.c[597,610] [2022-03-17 20:35:54,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:35:54,416 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:35:54,424 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/bresenham-ll_valuebound1.c[597,610] [2022-03-17 20:35:54,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:35:54,437 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:35:54,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54 WrapperNode [2022-03-17 20:35:54,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:35:54,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:35:54,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:35:54,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:35:54,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:35:54,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:35:54,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:35:54,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:35:54,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:35:54,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:35:54,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 20:35:54,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 20:35:54,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:35:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:35:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:35:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 20:35:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:35:54,518 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:35:54,518 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:35:54,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:35:54,519 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:35:54,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:35:54,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 20:35:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 20:35:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:35:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:35:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:35:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:35:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:35:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:35:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:35:54,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:35:54,566 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:35:54,567 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:35:54,706 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:35:54,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:35:54,711 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 20:35:54,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:35:54 BoogieIcfgContainer [2022-03-17 20:35:54,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:35:54,713 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:35:54,713 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:35:54,714 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:35:54,716 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:35:54" (1/1) ... [2022-03-17 20:35:54,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:35:54 BasicIcfg [2022-03-17 20:35:54,729 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:35:54,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:35:54,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:35:54,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:35:54,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:35:54" (1/4) ... [2022-03-17 20:35:54,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f23455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:35:54, skipping insertion in model container [2022-03-17 20:35:54,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:35:54" (2/4) ... [2022-03-17 20:35:54,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f23455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:35:54, skipping insertion in model container [2022-03-17 20:35:54,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:35:54" (3/4) ... [2022-03-17 20:35:54,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f23455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:35:54, skipping insertion in model container [2022-03-17 20:35:54,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:35:54" (4/4) ... [2022-03-17 20:35:54,734 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound1.cqvasr [2022-03-17 20:35:54,737 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:35:54,738 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:35:54,767 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:35:54,772 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 [2022-03-17 20:35:54,772 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:35:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 20:35:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 20:35:54,786 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:35:54,786 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:35:54,787 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:35:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:35:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2022-03-17 20:35:54,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:35:54,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549951386] [2022-03-17 20:35:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:54,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:35:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:35:54,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:35:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:35:54,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:35:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:35:54,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 20:35:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:35:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:35:54,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:35:54,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549951386] [2022-03-17 20:35:54,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549951386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:35:54,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:35:54,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:35:54,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227443843] [2022-03-17 20:35:54,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:35:54,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:35:54,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:35:54,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:35:54,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:35:54,950 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:35:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:35:55,015 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-17 20:35:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:35:55,018 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 20:35:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:35:55,023 INFO L225 Difference]: With dead ends: 57 [2022-03-17 20:35:55,024 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 20:35:55,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:35:55,028 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:35:55,028 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:35:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 20:35:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-17 20:35:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 20:35:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-17 20:35:55,053 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-17 20:35:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:35:55,054 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-17 20:35:55,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:35:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-17 20:35:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 20:35:55,055 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:35:55,055 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:35:55,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:35:55,056 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:35:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:35:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2022-03-17 20:35:55,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:35:55,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786819097] [2022-03-17 20:35:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:55,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:35:55,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:35:55,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519193343] [2022-03-17 20:35:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:55,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:35:55,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:35:55,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:35:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:35:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 20:35:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:35:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:35:55,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:35:55,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:35:55,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786819097] [2022-03-17 20:35:55,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:35:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519193343] [2022-03-17 20:35:55,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519193343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:35:55,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:35:55,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:35:55,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226498666] [2022-03-17 20:35:55,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:35:55,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:35:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:35:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:35:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:35:55,320 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 20:35:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:35:55,383 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-17 20:35:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:35:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-17 20:35:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:35:55,385 INFO L225 Difference]: With dead ends: 39 [2022-03-17 20:35:55,385 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 20:35:55,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:35:55,386 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:35:55,387 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:35:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 20:35:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-17 20:35:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 20:35:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-17 20:35:55,393 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-17 20:35:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:35:55,394 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-17 20:35:55,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 20:35:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-17 20:35:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 20:35:55,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:35:55,395 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:35:55,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 20:35:55,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:55,612 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:35:55,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:35:55,613 INFO L85 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2022-03-17 20:35:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:35:55,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512283771] [2022-03-17 20:35:55,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:35:55,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:35:55,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461495528] [2022-03-17 20:35:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:55,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:35:55,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:35:55,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 20:35:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:35:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-17 20:35:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:35:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:35:56,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:35:56,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:35:56,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512283771] [2022-03-17 20:35:56,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:35:56,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461495528] [2022-03-17 20:35:56,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461495528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:35:56,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:35:56,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-17 20:35:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311693201] [2022-03-17 20:35:56,210 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 20:35:56,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 20:35:56,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:35:56,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 20:35:56,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-17 20:35:56,211 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:35:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:35:56,337 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-17 20:35:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 20:35:56,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-17 20:35:56,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:35:56,338 INFO L225 Difference]: With dead ends: 61 [2022-03-17 20:35:56,338 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 20:35:56,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-17 20:35:56,339 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:35:56,340 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 142 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:35:56,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 20:35:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 20:35:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 20:35:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-17 20:35:56,344 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2022-03-17 20:35:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:35:56,345 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-17 20:35:56,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 20:35:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-17 20:35:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 20:35:56,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:35:56,346 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:35:56,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 20:35:56,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 20:35:56,563 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:35:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:35:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times [2022-03-17 20:35:56,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:35:56,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537936741] [2022-03-17 20:35:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:56,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:35:56,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:35:56,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556924048] [2022-03-17 20:35:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:35:56,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:35:56,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 20:35:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:35:56,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-17 20:35:56,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:35:56,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:35:56,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:35:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:35:57,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:35:57,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537936741] [2022-03-17 20:35:57,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:35:57,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556924048] [2022-03-17 20:35:57,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556924048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:35:57,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:35:57,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-03-17 20:35:57,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213762896] [2022-03-17 20:35:57,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:35:57,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 20:35:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:35:57,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 20:35:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-17 20:35:57,081 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-17 20:35:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:35:57,282 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-03-17 20:35:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 20:35:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 32 [2022-03-17 20:35:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:35:57,283 INFO L225 Difference]: With dead ends: 59 [2022-03-17 20:35:57,283 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 20:35:57,284 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-17 20:35:57,285 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:35:57,285 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 134 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:35:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 20:35:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-17 20:35:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 20:35:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-03-17 20:35:57,290 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2022-03-17 20:35:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:35:57,291 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-03-17 20:35:57,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-17 20:35:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-03-17 20:35:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 20:35:57,291 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:35:57,292 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:35:57,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 20:35:57,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:57,492 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:35:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:35:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2022-03-17 20:35:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:35:57,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618453334] [2022-03-17 20:35:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:35:57,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:35:57,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957467734] [2022-03-17 20:35:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:57,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:57,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:35:57,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:35:57,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 20:35:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:35:57,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-17 20:35:57,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:35:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 20:35:57,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:35:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 20:35:58,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:35:58,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618453334] [2022-03-17 20:35:58,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:35:58,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957467734] [2022-03-17 20:35:58,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957467734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:35:58,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:35:58,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-17 20:35:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484950926] [2022-03-17 20:35:58,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:35:58,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 20:35:58,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:35:58,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 20:35:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-17 20:35:58,144 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-17 20:35:58,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:35:58,532 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-03-17 20:35:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 20:35:58,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2022-03-17 20:35:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:35:58,533 INFO L225 Difference]: With dead ends: 55 [2022-03-17 20:35:58,533 INFO L226 Difference]: Without dead ends: 47 [2022-03-17 20:35:58,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2022-03-17 20:35:58,534 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:35:58,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 217 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 142 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-03-17 20:35:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-17 20:35:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-17 20:35:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 20:35:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-03-17 20:35:58,540 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-03-17 20:35:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:35:58,541 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-03-17 20:35:58,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-17 20:35:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-03-17 20:35:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-17 20:35:58,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:35:58,542 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:35:58,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 20:35:58,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:58,760 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:35:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:35:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1739644753, now seen corresponding path program 1 times [2022-03-17 20:35:58,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:35:58,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363283310] [2022-03-17 20:35:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:58,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:35:58,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:35:58,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738785192] [2022-03-17 20:35:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:58,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:58,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:35:58,775 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:35:58,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 20:35:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:35:58,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 20:35:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:35:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 20:35:59,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:35:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 20:35:59,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:35:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363283310] [2022-03-17 20:35:59,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:35:59,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738785192] [2022-03-17 20:35:59,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738785192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:35:59,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:35:59,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-17 20:35:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077706667] [2022-03-17 20:35:59,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:35:59,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 20:35:59,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:35:59,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 20:35:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-17 20:35:59,244 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-17 20:35:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:35:59,540 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2022-03-17 20:35:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 20:35:59,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 57 [2022-03-17 20:35:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:35:59,541 INFO L225 Difference]: With dead ends: 76 [2022-03-17 20:35:59,541 INFO L226 Difference]: Without dead ends: 70 [2022-03-17 20:35:59,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-03-17 20:35:59,542 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:35:59,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 199 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:35:59,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-17 20:35:59,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2022-03-17 20:35:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 20:35:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-03-17 20:35:59,552 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 57 [2022-03-17 20:35:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:35:59,552 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-03-17 20:35:59,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-17 20:35:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-03-17 20:35:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-17 20:35:59,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:35:59,553 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:35:59,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 20:35:59,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:59,768 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:35:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:35:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1357898193, now seen corresponding path program 2 times [2022-03-17 20:35:59,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:35:59,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184388207] [2022-03-17 20:35:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:35:59,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:35:59,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:35:59,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399029350] [2022-03-17 20:35:59,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:35:59,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:35:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:35:59,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:35:59,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:35:59,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:35:59,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:35:59,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 20:35:59,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:35:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 74 proven. 27 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 20:35:59,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:36:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 50 proven. 23 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-17 20:36:00,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:36:00,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184388207] [2022-03-17 20:36:00,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:36:00,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399029350] [2022-03-17 20:36:00,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399029350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:36:00,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:36:00,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-17 20:36:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293612176] [2022-03-17 20:36:00,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:36:00,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 20:36:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:36:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 20:36:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 20:36:00,085 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-17 20:36:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:36:00,137 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2022-03-17 20:36:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:36:00,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 75 [2022-03-17 20:36:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:36:00,138 INFO L225 Difference]: With dead ends: 85 [2022-03-17 20:36:00,138 INFO L226 Difference]: Without dead ends: 66 [2022-03-17 20:36:00,139 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:36:00,139 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:36:00,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 138 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:36:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-17 20:36:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-03-17 20:36:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 20:36:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-03-17 20:36:00,148 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 75 [2022-03-17 20:36:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:36:00,148 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-03-17 20:36:00,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-17 20:36:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-03-17 20:36:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-17 20:36:00,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:36:00,149 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:36:00,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:36:00,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:36:00,376 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:36:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:36:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1692304622, now seen corresponding path program 3 times [2022-03-17 20:36:00,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:36:00,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809596973] [2022-03-17 20:36:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:36:00,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:36:00,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:36:00,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61992363] [2022-03-17 20:36:00,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 20:36:00,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:36:00,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:36:00,387 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:36:00,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:36:00,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-17 20:36:00,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:36:00,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-17 20:36:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:36:00,892 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 20:36:00,895 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 20:36:00,896 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 20:36:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 20:36:05,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:36:06,137 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 20:36:07,202 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 20:36:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 20:36:30,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:36:30,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809596973] [2022-03-17 20:36:30,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:36:30,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61992363] [2022-03-17 20:36:30,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61992363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:36:30,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:36:30,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-17 20:36:30,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466868900] [2022-03-17 20:36:30,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:36:30,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-17 20:36:30,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:36:30,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-17 20:36:30,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=498, Unknown=4, NotChecked=0, Total=600 [2022-03-17 20:36:30,409 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 20:36:46,990 WARN L232 SmtUtils]: Spent 11.08s on a formula simplification. DAG size of input: 63 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:36:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:36:47,161 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-17 20:36:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-17 20:36:47,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 75 [2022-03-17 20:36:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:36:47,162 INFO L225 Difference]: With dead ends: 61 [2022-03-17 20:36:47,162 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 20:36:47,162 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=237, Invalid=1091, Unknown=4, NotChecked=0, Total=1332 [2022-03-17 20:36:47,163 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-17 20:36:47,163 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 243 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 283 Invalid, 0 Unknown, 73 Unchecked, 1.3s Time] [2022-03-17 20:36:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 20:36:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 20:36:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 20:36:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 20:36:47,164 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2022-03-17 20:36:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:36:47,164 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 20:36:47,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-17 20:36:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 20:36:47,164 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 20:36:47,166 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 20:36:47,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 20:36:47,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:36:47,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 20:36:53,713 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 20:36:53,714 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:36:53,714 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:36:53,714 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 20:36:53,714 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 20:36:53,714 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:36:53,714 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:36:53,714 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2022-03-17 20:36:53,714 INFO L882 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2022-03-17 20:36:53,714 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2022-03-17 20:36:53,714 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2022-03-17 20:36:53,714 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2022-03-17 20:36:53,714 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-17 20:36:53,714 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-17 20:36:53,714 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~X~0) (<= main_~X~0 1)) [2022-03-17 20:36:53,714 INFO L882 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-03-17 20:36:53,714 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse1 (* main_~Y~0 2)) (.cse3 (+ main_~X~0 main_~v~0)) (.cse5 (<= main_~X~0 1))) (or (let ((.cse4 (* main_~Y~0 main_~x~0))) (let ((.cse2 (* 2 .cse4))) (and (or (<= main_~x~0 main_~X~0) (and (let ((.cse0 (div (+ (div .cse3 (- 2)) main_~Y~0 .cse4) main_~X~0))) (= (+ main_~X~0 main_~v~0 (* (* .cse0 main_~x~0) 2)) (+ .cse1 (* .cse0 2) .cse2))) (or (forall ((main_~y~0 Int)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ (* main_~y~0 2) (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))))) (not (= main_~X~0 0))))) (<= main_~X~0 .cse1) (= (+ .cse1 .cse2) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= main_~Y~0 1) (<= 0 main_~X~0) .cse5 (<= (div main_~v~0 (- 2)) main_~Y~0)))) (and (< main_~v~0 .cse1) (<= 0 main_~Y~0) (= .cse3 (* main_~Y~0 4)) .cse5 (= main_~y~0 0)))) [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (* main_~Y~0 2)) (.cse5 (<= main_~X~0 1))) (or (let ((.cse0 (* 2 main_~xy~0)) (.cse4 (* 2 (* main_~Y~0 main_~x~0))) (.cse2 (* 2 main_~yx~0)) (.cse3 (<= main_~x~0 main_~X~0))) (and (= (+ .cse0 main_~X~0 main_~v~0) (+ .cse1 .cse2)) (or .cse3 (forall ((main_~y~0 Int)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ (* main_~y~0 2) (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))))) (not (= main_~X~0 0))) (<= main_~X~0 .cse1) (= (+ .cse1 .cse4) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= main_~Y~0 1) (<= 0 main_~X~0) .cse5 (<= (div main_~v~0 (- 2)) main_~Y~0) (or (= (+ .cse0 (* main_~y~0 2) .cse4) (+ (* 2 (* main_~y~0 main_~x~0)) .cse2)) .cse3))) (and (= main_~xy~0 0) (< main_~v~0 .cse1) (<= 0 main_~Y~0) (= (+ main_~X~0 main_~v~0) (* main_~Y~0 4)) .cse5 (= main_~y~0 0) (= main_~yx~0 0)))) [2022-03-17 20:36:53,715 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (* main_~Y~0 2))) (or (and (= main_~x~0 0) (= main_~xy~0 0) (= (+ main_~X~0 main_~v~0) .cse0) (= main_~y~0 0) (= main_~yx~0 0)) (let ((.cse2 (* main_~y~0 2)) (.cse1 (* 2 (* main_~Y~0 main_~x~0)))) (and (= (+ .cse0 .cse1) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= main_~Y~0 1) (<= 0 main_~Y~0) (= (+ .cse2 .cse0 (* 2 main_~yx~0)) (+ (* 2 main_~xy~0) main_~X~0 main_~v~0)) (<= 0 main_~X~0) (<= main_~X~0 1) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ .cse2 .cse0 .cse1)))))) [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-03-17 20:36:53,715 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2022-03-17 20:36:53,718 INFO L718 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-03-17 20:36:53,718 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 20:36:53,724 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 20:36:53,725 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 20:36:53,733 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 20:36:53,733 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 20:36:53,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:36:53 BasicIcfg [2022-03-17 20:36:53,742 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 20:36:53,742 INFO L158 Benchmark]: Toolchain (without parser) took 59514.51ms. Allocated memory was 191.9MB in the beginning and 319.8MB in the end (delta: 127.9MB). Free memory was 139.4MB in the beginning and 245.2MB in the end (delta: -105.8MB). Peak memory consumption was 154.7MB. Max. memory is 8.0GB. [2022-03-17 20:36:53,743 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory is still 156.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 20:36:53,743 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.18ms. Allocated memory is still 191.9MB. Free memory was 139.1MB in the beginning and 168.5MB in the end (delta: -29.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-17 20:36:53,743 INFO L158 Benchmark]: Boogie Preprocessor took 18.34ms. Allocated memory is still 191.9MB. Free memory was 168.5MB in the beginning and 166.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 20:36:53,743 INFO L158 Benchmark]: RCFGBuilder took 255.55ms. Allocated memory is still 191.9MB. Free memory was 166.9MB in the beginning and 156.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 20:36:53,743 INFO L158 Benchmark]: IcfgTransformer took 16.15ms. Allocated memory is still 191.9MB. Free memory was 156.4MB in the beginning and 154.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 20:36:53,743 INFO L158 Benchmark]: TraceAbstraction took 59012.24ms. Allocated memory was 191.9MB in the beginning and 319.8MB in the end (delta: 127.9MB). Free memory was 154.7MB in the beginning and 245.2MB in the end (delta: -90.5MB). Peak memory consumption was 171.7MB. Max. memory is 8.0GB. [2022-03-17 20:36:53,744 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory is still 156.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.18ms. Allocated memory is still 191.9MB. Free memory was 139.1MB in the beginning and 168.5MB in the end (delta: -29.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.34ms. Allocated memory is still 191.9MB. Free memory was 168.5MB in the beginning and 166.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 255.55ms. Allocated memory is still 191.9MB. Free memory was 166.9MB in the beginning and 156.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 16.15ms. Allocated memory is still 191.9MB. Free memory was 156.4MB in the beginning and 154.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 59012.24ms. Allocated memory was 191.9MB in the beginning and 319.8MB in the end (delta: 127.9MB). Free memory was 154.7MB in the beginning and 245.2MB in the end (delta: -90.5MB). Peak memory consumption was 171.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] * 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: 16]: 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: 59.0s, OverallIterations: 8, TraceHistogramMax: 7, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 18.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 190 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 180 mSDsluCounter, 1208 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 139 IncrementalHoareTripleChecker+Unchecked, 1013 mSDsCounter, 139 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 999 IncrementalHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 139 mSolverCounterUnsat, 195 mSDtfsCounter, 999 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 674 GetRequests, 524 SyntacticMatches, 7 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 34.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=7, InterpolantAutomatonStates: 105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 23 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 35 PreInvPairs, 58 NumberOfFragments, 383 HoareAnnotationTreeSize, 35 FomulaSimplifications, 687 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2815 FormulaSimplificationTreeSizeReductionInter, 6.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 32.5s InterpolantComputationTime, 356 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 621 ConstructedInterpolants, 6 QuantifiedInterpolants, 3639 SizeOfPredicates, 39 NumberOfNonLiveVariables, 884 ConjunctsInSsa, 143 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 637/746 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: 32]: Loop Invariant [2022-03-17 20:36:53,753 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 20:36:53,753 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 20:36:53,754 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-17 20:36:53,754 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] Derived loop invariant: (((((((x <= X || (X + v + ((X + v) / -2 + Y + Y * x) / X * x * 2 == Y * 2 + ((X + v) / -2 + Y + Y * x) / X * 2 + 2 * (Y * x) && ((forall main_~y~0 : int :: 2 * (main_~y~0 * x) + X + v == main_~y~0 * 2 + Y * 2 + 2 * (Y * x)) || !(X == 0)))) && X <= Y * 2) && Y * 2 + 2 * (Y * x) == X * y * 2 + X + v) && Y <= 1) && 0 <= X) && X <= 1) && v / -2 <= Y) || ((((v < Y * 2 && 0 <= Y) && X + v == Y * 4) && X <= 1) && y == 0) RESULT: Ultimate proved your program to be correct! [2022-03-17 20:36:53,957 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-17 20:36:53,971 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...