/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-b030c9e [2022-03-20 09:24:06,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:24:06,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:24:06,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:24:06,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:24:06,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:24:06,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:24:06,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:24:06,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:24:06,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:24:06,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:24:06,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:24:06,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:24:06,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:24:06,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:24:06,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:24:06,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:24:06,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:24:06,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:24:06,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:24:06,234 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:24:06,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:24:06,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:24:06,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:24:06,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:24:06,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 09:24:06,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:24:06,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:24:06,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:24:06,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:24:06,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:24:06,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:24:06,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:24:06,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:24:06,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:24:06,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:24:06,284 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:24:06,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:24:06,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:24:06,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:24:06,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:24:06,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:24:06,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:24:06,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:24:06,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:24:06,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:24:06,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:24:06,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:24:06,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:24:06,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:24:06,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:24:06,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:24:06,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:24:06,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:24:06,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:24:06,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:24:06,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:24:06,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:24:06,288 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:24:06,288 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:24:06,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:24:06,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:24:06,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:24:06,540 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:24:06,540 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:24:06,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c [2022-03-20 09:24:06,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c832ff012/065aaa9b6270436194d3c44bf5b0f760/FLAG144d20ea6 [2022-03-20 09:24:06,905 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:24:06,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c [2022-03-20 09:24:06,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c832ff012/065aaa9b6270436194d3c44bf5b0f760/FLAG144d20ea6 [2022-03-20 09:24:07,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c832ff012/065aaa9b6270436194d3c44bf5b0f760 [2022-03-20 09:24:07,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:24:07,343 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:24:07,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:24:07,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:24:07,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:24:07,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea3e5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07, skipping insertion in model container [2022-03-20 09:24:07,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:24:07,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:24:07,549 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] [2022-03-20 09:24:07,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:24:07,578 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:24:07,589 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] [2022-03-20 09:24:07,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:24:07,619 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:24:07,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07 WrapperNode [2022-03-20 09:24:07,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:24:07,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:24:07,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:24:07,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:24:07,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:24:07,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:24:07,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:24:07,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:24:07,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:24:07,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:07,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 09:24:07,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 09:24:07,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:24:07,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:24:07,730 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:24:07,730 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:24:07,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:24:07,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:24:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:24:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:24:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:24:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:24:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:24:07,775 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:24:07,777 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:24:07,880 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:24:07,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:24:07,887 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 09:24:07,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:24:07 BoogieIcfgContainer [2022-03-20 09:24:07,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:24:07,889 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:24:07,889 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:24:07,890 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:24:07,893 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:24:07" (1/1) ... [2022-03-20 09:24:07,894 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:24:07,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:24:07 BasicIcfg [2022-03-20 09:24:07,908 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:24:07,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:24:07,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:24:07,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:24:07,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:24:07" (1/4) ... [2022-03-20 09:24:07,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c944bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:24:07, skipping insertion in model container [2022-03-20 09:24:07,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:07" (2/4) ... [2022-03-20 09:24:07,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c944bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:24:07, skipping insertion in model container [2022-03-20 09:24:07,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:24:07" (3/4) ... [2022-03-20 09:24:07,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c944bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:24:07, skipping insertion in model container [2022-03-20 09:24:07,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:24:07" (4/4) ... [2022-03-20 09:24:07,925 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound1.cqvasr [2022-03-20 09:24:07,928 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:24:07,928 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:24:07,966 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:24:07,970 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 [2022-03-20 09:24:07,970 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:24:07,979 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) [2022-03-20 09:24:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:24:07,982 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:07,983 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:24:07,983 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:07,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2022-03-20 09:24:07,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:07,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803609056] [2022-03-20 09:24:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:07,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:08,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:24:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:08,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:24:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:08,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 09:24:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:24:08,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:08,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803609056] [2022-03-20 09:24:08,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803609056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:24:08,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:24:08,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:24:08,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360657036] [2022-03-20 09:24:08,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:24:08,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:24:08,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:24:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:24:08,165 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) [2022-03-20 09:24:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:08,217 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-20 09:24:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:24:08,219 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 [2022-03-20 09:24:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:08,225 INFO L225 Difference]: With dead ends: 57 [2022-03-20 09:24:08,225 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 09:24:08,227 INFO L912 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 [2022-03-20 09:24:08,230 INFO L913 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 [2022-03-20 09:24:08,231 INFO L914 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] [2022-03-20 09:24:08,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 09:24:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 09:24:08,261 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) [2022-03-20 09:24:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 09:24:08,263 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-20 09:24:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:08,263 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 09:24:08,263 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) [2022-03-20 09:24:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 09:24:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:24:08,265 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:08,265 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:24:08,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:24:08,266 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2022-03-20 09:24:08,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068095570] [2022-03-20 09:24:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:08,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:08,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200026410] [2022-03-20 09:24:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:08,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:08,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:08,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:24:08,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:24:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:08,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 09:24:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:24:08,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:24:08,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:08,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068095570] [2022-03-20 09:24:08,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:08,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200026410] [2022-03-20 09:24:08,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200026410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:24:08,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:24:08,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 09:24:08,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595794884] [2022-03-20 09:24:08,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:24:08,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 09:24:08,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:08,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 09:24:08,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:24:08,506 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) [2022-03-20 09:24:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:08,574 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-20 09:24:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:24:08,574 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 [2022-03-20 09:24:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:08,576 INFO L225 Difference]: With dead ends: 39 [2022-03-20 09:24:08,576 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 09:24:08,577 INFO L912 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 [2022-03-20 09:24:08,578 INFO L913 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 [2022-03-20 09:24:08,578 INFO L914 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] [2022-03-20 09:24:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 09:24:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 09:24:08,588 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) [2022-03-20 09:24:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 09:24:08,589 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-20 09:24:08,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:08,590 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 09:24:08,590 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) [2022-03-20 09:24:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 09:24:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 09:24:08,592 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:08,592 INFO L499 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] [2022-03-20 09:24:08,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 09:24:08,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:08,809 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:08,809 INFO L85 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2022-03-20 09:24:08,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:08,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967882485] [2022-03-20 09:24:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:08,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:08,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:08,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205281520] [2022-03-20 09:24:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:08,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:08,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:08,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:24:08,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:24:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:08,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 09:24:08,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:24:09,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:24:09,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:09,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967882485] [2022-03-20 09:24:09,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:09,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205281520] [2022-03-20 09:24:09,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205281520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:24:09,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:24:09,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 09:24:09,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42324677] [2022-03-20 09:24:09,435 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:24:09,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 09:24:09,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:09,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 09:24:09,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:24:09,437 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) [2022-03-20 09:24:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:09,560 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-20 09:24:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:24:09,560 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 [2022-03-20 09:24:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:09,561 INFO L225 Difference]: With dead ends: 61 [2022-03-20 09:24:09,561 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 09:24:09,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-20 09:24:09,562 INFO L913 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 [2022-03-20 09:24:09,562 INFO L914 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] [2022-03-20 09:24:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 09:24:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 09:24:09,569 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) [2022-03-20 09:24:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-20 09:24:09,576 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2022-03-20 09:24:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:09,576 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-20 09:24:09,577 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) [2022-03-20 09:24:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-20 09:24:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 09:24:09,578 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:09,578 INFO L499 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] [2022-03-20 09:24:09,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 09:24:09,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 09:24:09,786 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times [2022-03-20 09:24:09,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:09,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132782648] [2022-03-20 09:24:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:09,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:09,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:09,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582382055] [2022-03-20 09:24:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:09,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:09,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:09,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:24:09,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:24:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 09:24:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:24:10,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:24:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:24:10,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:10,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132782648] [2022-03-20 09:24:10,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:10,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582382055] [2022-03-20 09:24:10,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582382055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:24:10,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:24:10,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-03-20 09:24:10,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077476277] [2022-03-20 09:24:10,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:24:10,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 09:24:10,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 09:24:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-20 09:24:10,262 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) [2022-03-20 09:24:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:10,452 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-03-20 09:24:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 09:24:10,453 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 [2022-03-20 09:24:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:10,454 INFO L225 Difference]: With dead ends: 59 [2022-03-20 09:24:10,454 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 09:24:10,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-20 09:24:10,455 INFO L913 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 [2022-03-20 09:24:10,455 INFO L914 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] [2022-03-20 09:24:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 09:24:10,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-20 09:24:10,459 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) [2022-03-20 09:24:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-03-20 09:24:10,460 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 32 [2022-03-20 09:24:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:10,460 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-03-20 09:24:10,460 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) [2022-03-20 09:24:10,461 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-03-20 09:24:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 09:24:10,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:10,461 INFO L499 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] [2022-03-20 09:24:10,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:24:10,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:10,677 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2022-03-20 09:24:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:10,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172804192] [2022-03-20 09:24:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:10,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:10,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:10,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212427320] [2022-03-20 09:24:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:10,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:10,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:10,700 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:24:10,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:24:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:10,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 09:24:10,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 09:24:11,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:24:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 09:24:11,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:11,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172804192] [2022-03-20 09:24:11,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:11,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212427320] [2022-03-20 09:24:11,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212427320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:24:11,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:24:11,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-20 09:24:11,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558208097] [2022-03-20 09:24:11,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:24:11,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 09:24:11,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 09:24:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 09:24:11,275 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) [2022-03-20 09:24:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:11,657 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-03-20 09:24:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 09:24:11,658 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 [2022-03-20 09:24:11,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:11,658 INFO L225 Difference]: With dead ends: 55 [2022-03-20 09:24:11,659 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 09:24:11,659 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 09:24:11,660 INFO L913 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 [2022-03-20 09:24:11,660 INFO L914 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] [2022-03-20 09:24:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 09:24:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 09:24:11,665 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) [2022-03-20 09:24:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-03-20 09:24:11,666 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-03-20 09:24:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:11,666 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-03-20 09:24:11,666 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) [2022-03-20 09:24:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-03-20 09:24:11,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 09:24:11,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:11,667 INFO L499 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] [2022-03-20 09:24:11,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 09:24:11,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:11,887 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:11,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1739644753, now seen corresponding path program 1 times [2022-03-20 09:24:11,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:11,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999821534] [2022-03-20 09:24:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:11,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:11,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:11,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424765033] [2022-03-20 09:24:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:11,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:11,907 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) [2022-03-20 09:24:11,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:24:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:11,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 09:24:11,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 09:24:12,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:24:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 09:24:12,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999821534] [2022-03-20 09:24:12,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424765033] [2022-03-20 09:24:12,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424765033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:24:12,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:24:12,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 09:24:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754114921] [2022-03-20 09:24:12,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:24:12,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 09:24:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 09:24:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-20 09:24:12,343 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) [2022-03-20 09:24:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:12,615 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2022-03-20 09:24:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 09:24:12,616 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 [2022-03-20 09:24:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:12,616 INFO L225 Difference]: With dead ends: 76 [2022-03-20 09:24:12,616 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 09:24:12,617 INFO L912 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 [2022-03-20 09:24:12,617 INFO L913 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 [2022-03-20 09:24:12,618 INFO L914 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] [2022-03-20 09:24:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 09:24:12,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2022-03-20 09:24:12,625 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) [2022-03-20 09:24:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-03-20 09:24:12,626 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 57 [2022-03-20 09:24:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:12,626 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-03-20 09:24:12,626 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) [2022-03-20 09:24:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-03-20 09:24:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 09:24:12,627 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:12,627 INFO L499 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] [2022-03-20 09:24:12,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:24:12,861 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 [2022-03-20 09:24:12,861 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:12,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1357898193, now seen corresponding path program 2 times [2022-03-20 09:24:12,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:12,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693777464] [2022-03-20 09:24:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:12,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:12,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:12,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869172752] [2022-03-20 09:24:12,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:24:12,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:12,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:12,873 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) [2022-03-20 09:24:12,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 09:24:12,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:24:12,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:24:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 09:24:12,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 74 proven. 27 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 09:24:13,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:24:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 50 proven. 23 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-20 09:24:13,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:13,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693777464] [2022-03-20 09:24:13,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:13,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869172752] [2022-03-20 09:24:13,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869172752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:24:13,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:24:13,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 09:24:13,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624559333] [2022-03-20 09:24:13,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:24:13,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 09:24:13,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:13,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 09:24:13,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 09:24:13,203 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) [2022-03-20 09:24:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:13,251 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2022-03-20 09:24:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:24:13,251 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 [2022-03-20 09:24:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:13,252 INFO L225 Difference]: With dead ends: 85 [2022-03-20 09:24:13,252 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 09:24:13,252 INFO L912 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 [2022-03-20 09:24:13,253 INFO L913 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 [2022-03-20 09:24:13,253 INFO L914 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] [2022-03-20 09:24:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 09:24:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-03-20 09:24:13,261 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) [2022-03-20 09:24:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-03-20 09:24:13,261 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 75 [2022-03-20 09:24:13,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:13,262 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-03-20 09:24:13,262 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) [2022-03-20 09:24:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-03-20 09:24:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 09:24:13,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:13,263 INFO L499 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] [2022-03-20 09:24:13,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 09:24:13,477 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 [2022-03-20 09:24:13,478 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:13,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:13,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1692304622, now seen corresponding path program 3 times [2022-03-20 09:24:13,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:13,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621903772] [2022-03-20 09:24:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:13,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:13,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:13,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815067944] [2022-03-20 09:24:13,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:24:13,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:13,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:13,486 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) [2022-03-20 09:24:13,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 09:24:13,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 09:24:13,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:24:13,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 09:24:13,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:14,031 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:24:14,037 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:24:14,039 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:24:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 09:24:19,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:24:19,257 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:24:19,981 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:24:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 09:24:30,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:30,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621903772] [2022-03-20 09:24:30,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:30,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815067944] [2022-03-20 09:24:30,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815067944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:24:30,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:24:30,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-20 09:24:30,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172019069] [2022-03-20 09:24:30,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:24:30,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 09:24:30,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 09:24:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=501, Unknown=1, NotChecked=0, Total=600 [2022-03-20 09:24:30,287 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) [2022-03-20 09:24:44,356 WARN L232 SmtUtils]: Spent 11.33s 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) [2022-03-20 09:24:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:44,415 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-20 09:24:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:24:44,415 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 [2022-03-20 09:24:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:44,415 INFO L225 Difference]: With dead ends: 61 [2022-03-20 09:24:44,415 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 09:24:44,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=237, Invalid=1094, Unknown=1, NotChecked=0, Total=1332 [2022-03-20 09:24:44,417 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:24:44,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 243 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 283 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-03-20 09:24:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 09:24:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 09:24:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 09:24:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 09:24:44,417 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2022-03-20 09:24:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:44,418 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 09:24:44,418 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) [2022-03-20 09:24:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 09:24:44,418 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 09:24:44,420 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 09:24:44,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 09:24:44,631 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 [2022-03-20 09:24:44,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 09:24:49,031 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 09:24:49,031 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:24:49,031 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:24:49,031 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 09:24:49,031 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 09:24:49,031 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:24:49,032 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:24:49,032 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2022-03-20 09:24:49,032 INFO L882 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2022-03-20 09:24:49,032 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2022-03-20 09:24:49,032 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2022-03-20 09:24:49,032 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2022-03-20 09:24:49,032 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-20 09:24:49,032 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-20 09:24:49,032 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~X~0) (<= main_~X~0 1)) [2022-03-20 09:24:49,032 INFO L882 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-03-20 09:24:49,032 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)))) [2022-03-20 09:24:49,032 INFO L882 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2022-03-20 09:24:49,032 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)))) [2022-03-20 09:24:49,033 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)))))) [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-03-20 09:24:49,033 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2022-03-20 09:24:49,036 INFO L719 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-03-20 09:24:49,036 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 09:24:49,042 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:24:49,042 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:24:49,047 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:24:49,047 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:24:49,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:24:49 BasicIcfg [2022-03-20 09:24:49,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 09:24:49,048 INFO L158 Benchmark]: Toolchain (without parser) took 41704.69ms. Allocated memory was 178.3MB in the beginning and 256.9MB in the end (delta: 78.6MB). Free memory was 123.6MB in the beginning and 182.0MB in the end (delta: -58.5MB). Peak memory consumption was 120.5MB. Max. memory is 8.0GB. [2022-03-20 09:24:49,048 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory is still 139.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 09:24:49,048 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.35ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 123.4MB in the beginning and 186.7MB in the end (delta: -63.3MB). Peak memory consumption was 7.5MB. Max. memory is 8.0GB. [2022-03-20 09:24:49,049 INFO L158 Benchmark]: Boogie Preprocessor took 30.00ms. Allocated memory is still 213.9MB. Free memory was 186.7MB in the beginning and 185.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:24:49,049 INFO L158 Benchmark]: RCFGBuilder took 234.84ms. Allocated memory is still 213.9MB. Free memory was 185.4MB in the beginning and 173.8MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 09:24:49,049 INFO L158 Benchmark]: IcfgTransformer took 19.44ms. Allocated memory is still 213.9MB. Free memory was 173.8MB in the beginning and 172.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:24:49,049 INFO L158 Benchmark]: TraceAbstraction took 41137.60ms. Allocated memory was 213.9MB in the beginning and 256.9MB in the end (delta: 43.0MB). Free memory was 171.7MB in the beginning and 182.0MB in the end (delta: -10.3MB). Peak memory consumption was 132.8MB. Max. memory is 8.0GB. [2022-03-20 09:24:49,050 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory is still 139.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 273.35ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 123.4MB in the beginning and 186.7MB in the end (delta: -63.3MB). Peak memory consumption was 7.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.00ms. Allocated memory is still 213.9MB. Free memory was 186.7MB in the beginning and 185.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 234.84ms. Allocated memory is still 213.9MB. Free memory was 185.4MB in the beginning and 173.8MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 19.44ms. Allocated memory is still 213.9MB. Free memory was 173.8MB in the beginning and 172.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 41137.60ms. Allocated memory was 213.9MB in the beginning and 256.9MB in the end (delta: 43.0MB). Free memory was 171.7MB in the beginning and 182.0MB in the end (delta: -10.3MB). Peak memory consumption was 132.8MB. 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: 41.1s, OverallIterations: 8, TraceHistogramMax: 7, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 15.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 190 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 180 mSDsluCounter, 1208 SdHoareTripleChecker+Invalid, 0.9s 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, 21.1s 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, 4.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 19.1s 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 [2022-03-20 09:24:49,054 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:24:49,054 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:24:49,054 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:24:49,054 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! [2022-03-20 09:24:49,119 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...