/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:24:53,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:24:53,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:24:53,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:24:53,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:24:53,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:24:53,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:24:53,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:24:53,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:24:53,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:24:53,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:24:53,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:24:53,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:24:53,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:24:53,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:24:53,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:24:53,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:24:53,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:24:53,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:24:53,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:24:53,914 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:24:53,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:24:53,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:24:53,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:24:53,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:24:53,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 09:24:53,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:24:53,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:24:53,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:24:53,933 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 09:24:53,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:24:53,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:24:53,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:24:53,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:24:53,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:24:53,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:24:53,950 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:24:53,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:24:53,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:24:53,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:24:53,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:24:53,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:24:53,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:24:53,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:24:53,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:24:53,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:24:53,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:24:53,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:24:53,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:24:53,952 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:24:53,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:24:54,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:24:54,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:24:54,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:24:54,177 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:24:54,178 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:24:54,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c [2022-03-20 09:24:54,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c3ccd4f4/f318d62345fc465f966c942c6e5ce313/FLAG4dcc9edde [2022-03-20 09:24:54,571 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:24:54,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c [2022-03-20 09:24:54,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c3ccd4f4/f318d62345fc465f966c942c6e5ce313/FLAG4dcc9edde [2022-03-20 09:24:55,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c3ccd4f4/f318d62345fc465f966c942c6e5ce313 [2022-03-20 09:24:55,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:24:55,006 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:24:55,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:24:55,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:24:55,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:24:55,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce09017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55, skipping insertion in model container [2022-03-20 09:24:55,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:24:55,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:24:55,153 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_valuebound100.c[597,610] [2022-03-20 09:24:55,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:24:55,192 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:24:55,200 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_valuebound100.c[597,610] [2022-03-20 09:24:55,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:24:55,228 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:24:55,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55 WrapperNode [2022-03-20 09:24:55,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:24:55,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:24:55,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:24:55,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:24:55,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:24:55,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:24:55,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:24:55,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:24:55,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:24:55,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:55,301 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 09:24:55,323 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 09:24:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:24:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:24:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:24:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:24:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:24:55,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:24:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:24:55,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:24:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:24:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:24:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 09:24:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:24:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:24:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:24:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:24:55,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:24:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:24:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:24:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:24:55,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:24:55,409 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:24:55,410 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:24:55,493 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:24:55,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:24:55,497 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 09:24:55,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:24:55 BoogieIcfgContainer [2022-03-20 09:24:55,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:24:55,499 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:24:55,499 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:24:55,500 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:24:55,502 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:24:55" (1/1) ... [2022-03-20 09:24:55,503 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:24:55,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:24:55 BasicIcfg [2022-03-20 09:24:55,519 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:24:55,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:24:55,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:24:55,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:24:55,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:24:55" (1/4) ... [2022-03-20 09:24:55,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0ea74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:24:55, skipping insertion in model container [2022-03-20 09:24:55,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:24:55" (2/4) ... [2022-03-20 09:24:55,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0ea74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:24:55, skipping insertion in model container [2022-03-20 09:24:55,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:24:55" (3/4) ... [2022-03-20 09:24:55,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0ea74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:24:55, skipping insertion in model container [2022-03-20 09:24:55,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:24:55" (4/4) ... [2022-03-20 09:24:55,525 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound100.cqvasr [2022-03-20 09:24:55,528 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:24:55,529 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:24:55,558 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:24:55,562 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 09:24:55,563 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:24:55,574 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 09:24:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:24:55,578 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:55,578 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 09:24:55,579 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:55,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2022-03-20 09:24:55,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475512495] [2022-03-20 09:24:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:55,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:24:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:55,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:24:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:55,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 09:24:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:55,707 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 09:24:55,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475512495] [2022-03-20 09:24:55,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475512495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:24:55,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:24:55,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:24:55,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779034541] [2022-03-20 09:24:55,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:24:55,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:24:55,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:24:55,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:24:55,733 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 09:24:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:55,793 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-20 09:24:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:24:55,795 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 09:24:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:55,800 INFO L225 Difference]: With dead ends: 57 [2022-03-20 09:24:55,800 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 09:24:55,802 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 09:24:55,805 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 09:24:55,805 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 09:24:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 09:24:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 09:24:55,831 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 09:24:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 09:24:55,836 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-20 09:24:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:55,837 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 09:24:55,837 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 09:24:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 09:24:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:24:55,838 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:55,838 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 09:24:55,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:24:55,839 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2022-03-20 09:24:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:55,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389469693] [2022-03-20 09:24:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:55,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:55,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:55,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662918732] [2022-03-20 09:24:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:55,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:55,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:55,881 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 09:24:55,882 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 09:24:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:55,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 09:24:55,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:56,095 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 09:24:56,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:24:56,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:56,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389469693] [2022-03-20 09:24:56,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:56,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662918732] [2022-03-20 09:24:56,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662918732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:24:56,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:24:56,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 09:24:56,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755464104] [2022-03-20 09:24:56,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:24:56,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 09:24:56,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:56,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 09:24:56,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:24:56,101 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 09:24:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:56,186 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-20 09:24:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:24:56,186 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 09:24:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:56,188 INFO L225 Difference]: With dead ends: 39 [2022-03-20 09:24:56,188 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 09:24:56,190 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 09:24:56,191 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 09:24:56,195 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 09:24:56,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 09:24:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 09:24:56,200 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 09:24:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 09:24:56,201 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-20 09:24:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:56,202 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 09:24:56,202 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 09:24:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 09:24:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 09:24:56,203 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:56,203 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 09:24:56,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 09:24:56,403 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 09:24:56,404 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:56,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:56,405 INFO L85 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2022-03-20 09:24:56,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:56,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818396727] [2022-03-20 09:24:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:56,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:56,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:56,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328514891] [2022-03-20 09:24:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:56,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:56,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:56,429 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 09:24:56,430 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 09:24:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:56,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 09:24:56,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:56,640 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 09:24:56,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:24:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 09:24:56,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818396727] [2022-03-20 09:24:56,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328514891] [2022-03-20 09:24:56,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328514891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:24:56,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:24:56,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-20 09:24:56,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872448008] [2022-03-20 09:24:56,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:24:56,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 09:24:56,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:56,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 09:24:56,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:24:56,745 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:24:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:56,913 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-20 09:24:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 09:24:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-03-20 09:24:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:56,914 INFO L225 Difference]: With dead ends: 48 [2022-03-20 09:24:56,914 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 09:24:56,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-20 09:24:56,915 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:24:56,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:24:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 09:24:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-20 09:24:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 09:24:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-20 09:24:56,922 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-03-20 09:24:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:56,922 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-20 09:24:56,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:24:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-20 09:24:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 09:24:56,923 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:56,923 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 09:24:56,940 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 09:24:57,137 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 09:24:57,137 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2022-03-20 09:24:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780192736] [2022-03-20 09:24:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:57,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:57,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040720269] [2022-03-20 09:24:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:57,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:57,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:57,153 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 09:24:57,154 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 09:24:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:57,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 09:24:57,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:57,448 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 09:24:57,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:24:57,737 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 09:24:57,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:57,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780192736] [2022-03-20 09:24:57,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:57,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040720269] [2022-03-20 09:24:57,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040720269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:24:57,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:24:57,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-20 09:24:57,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279169790] [2022-03-20 09:24:57,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:24:57,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 09:24:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 09:24:57,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 09:24:57,739 INFO L87 Difference]: Start difference. First operand 41 states and 45 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 09:24:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:24:58,221 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-03-20 09:24:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 09:24:58,221 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 09:24:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:24:58,222 INFO L225 Difference]: With dead ends: 60 [2022-03-20 09:24:58,222 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 09:24:58,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 09:24:58,223 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:24:58,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 280 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 276 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-03-20 09:24:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 09:24:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-03-20 09:24:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 09:24:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-20 09:24:58,230 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2022-03-20 09:24:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:24:58,230 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-20 09:24:58,230 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 09:24:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-20 09:24:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 09:24:58,231 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:24:58,231 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:24:58,250 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 09:24:58,447 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 09:24:58,448 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:24:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:24:58,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1381917339, now seen corresponding path program 1 times [2022-03-20 09:24:58,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:24:58,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705197412] [2022-03-20 09:24:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:58,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:24:58,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:24:58,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426607195] [2022-03-20 09:24:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:24:58,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:24:58,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:24:58,459 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 09:24:58,489 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 09:24:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:24:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 09:24:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:24:58,636 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:24:58,638 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:24:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 09:24:59,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:24:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 09:24:59,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:24:59,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705197412] [2022-03-20 09:24:59,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:24:59,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426607195] [2022-03-20 09:24:59,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426607195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:24:59,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:24:59,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 09:24:59,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95717439] [2022-03-20 09:24:59,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:24:59,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 09:24:59,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:24:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 09:24:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:24:59,691 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 09:25:01,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:25:05,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:25:07,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:25:09,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:25:11,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:25:13,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 09:25:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:25:16,137 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-03-20 09:25:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:25:16,138 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2022-03-20 09:25:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:25:16,139 INFO L225 Difference]: With dead ends: 56 [2022-03-20 09:25:16,139 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 09:25:16,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2022-03-20 09:25:16,139 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 19 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:25:16,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 140 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 105 Invalid, 6 Unknown, 0 Unchecked, 12.1s Time] [2022-03-20 09:25:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 09:25:16,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-03-20 09:25:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 09:25:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-03-20 09:25:16,146 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 48 [2022-03-20 09:25:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:25:16,146 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-03-20 09:25:16,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-20 09:25:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-03-20 09:25:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 09:25:16,149 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:25:16,150 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:25:16,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:25:16,363 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 09:25:16,363 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:25:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:25:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -137152858, now seen corresponding path program 1 times [2022-03-20 09:25:16,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:25:16,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201088801] [2022-03-20 09:25:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:25:16,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:25:16,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:25:16,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129210915] [2022-03-20 09:25:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:25:16,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:25:16,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:25:16,379 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 09:25:16,380 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 09:25:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:25:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:25:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:25:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 09:25:16,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:25:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 09:25:16,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:25:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201088801] [2022-03-20 09:25:16,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:25:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129210915] [2022-03-20 09:25:16,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129210915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:25:16,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:25:16,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 09:25:16,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355826581] [2022-03-20 09:25:16,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:25:16,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 09:25:16,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:25:16,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 09:25:16,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:25:16,751 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 09:25:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:25:16,918 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-03-20 09:25:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:25:16,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-03-20 09:25:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:25:16,921 INFO L225 Difference]: With dead ends: 65 [2022-03-20 09:25:16,921 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 09:25:16,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-20 09:25:16,923 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:25:16,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 191 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:25:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 09:25:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-03-20 09:25:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 09:25:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-20 09:25:16,941 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2022-03-20 09:25:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:25:16,941 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-20 09:25:16,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-20 09:25:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-20 09:25:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 09:25:16,942 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:25:16,942 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 09:25:16,976 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 09:25:17,160 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 09:25:17,161 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:25:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:25:17,161 INFO L85 PathProgramCache]: Analyzing trace with hash -545218702, now seen corresponding path program 2 times [2022-03-20 09:25:17,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:25:17,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961137817] [2022-03-20 09:25:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:25:17,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:25:17,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:25:17,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044199665] [2022-03-20 09:25:17,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:25:17,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:25:17,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:25:17,183 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 09:25:17,184 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 09:25:17,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:25:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:25:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:25:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:25:17,392 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 09:25:17,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:25:17,563 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 09:25:17,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:25:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961137817] [2022-03-20 09:25:17,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:25:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044199665] [2022-03-20 09:25:17,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044199665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:25:17,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:25:17,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 09:25:17,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281435916] [2022-03-20 09:25:17,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:25:17,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 09:25:17,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:25:17,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 09:25:17,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:25:17,565 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 09:25:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:25:17,731 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-03-20 09:25:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 09:25:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 09:25:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:25:17,733 INFO L225 Difference]: With dead ends: 78 [2022-03-20 09:25:17,733 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 09:25:17,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-20 09:25:17,734 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:25:17,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 287 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:25:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 09:25:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-03-20 09:25:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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 09:25:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-03-20 09:25:17,748 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 57 [2022-03-20 09:25:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:25:17,749 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-03-20 09:25:17,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 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 09:25:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-03-20 09:25:17,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 09:25:17,752 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:25:17,752 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 09:25:17,773 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 09:25:17,968 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 09:25:17,968 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:25:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:25:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash 494880272, now seen corresponding path program 3 times [2022-03-20 09:25:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:25:17,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209545399] [2022-03-20 09:25:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:25:17,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:25:17,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:25:17,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867597379] [2022-03-20 09:25:17,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:25:17,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:25:17,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:25:17,980 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 09:25:17,981 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 09:25:18,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 09:25:18,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:25:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 09:25:18,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:25:19,601 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:25:19,609 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:25:19,610 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:25:29,534 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0) (<= c_main_~X~0 100) (< c_main_~v~0 (* 2 c_main_~Y~0)) (<= c_main_~Y~0 100) (<= 0 c_main_~Y~0)) is different from false [2022-03-20 09:25:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 09:25:33,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:25:33,568 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:25:34,554 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:25:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 09:25:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:25:54,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209545399] [2022-03-20 09:25:54,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:25:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867597379] [2022-03-20 09:25:54,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867597379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:25:54,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:25:54,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-20 09:25:54,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99567771] [2022-03-20 09:25:54,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:25:54,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 09:25:54,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:25:54,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 09:25:54,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=459, Unknown=3, NotChecked=44, Total=600 [2022-03-20 09:25:54,565 INFO L87 Difference]: Start difference. First operand 56 states and 66 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 09:26:03,418 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (* 2 c_main_~y~0)) (.cse8 (* 2 c_main_~Y~0))) (and (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0) (<= c_main_~X~0 100) (= (+ (* c_main_~xy~0 2) c_main_~v~0 c_main_~X~0) (+ (* c_main_~yx~0 2) .cse7 .cse8)) (< c_main_~v~0 .cse8) (<= c_main_~Y~0 100) (= (+ (* 2 (* c_main_~x~0 c_main_~y~0)) c_main_~v~0 c_main_~X~0) (+ (* 2 (* c_main_~Y~0 c_main_~x~0)) .cse7 .cse8)) (<= 0 c_main_~Y~0))) is different from false [2022-03-20 09:26:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:26:03,625 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-03-20 09:26:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 09:26:03,625 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 57 [2022-03-20 09:26:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:26:03,625 INFO L225 Difference]: With dead ends: 62 [2022-03-20 09:26:03,625 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 09:26:03,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=224, Invalid=970, Unknown=4, NotChecked=134, Total=1332 [2022-03-20 09:26:03,627 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 09:26:03,627 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 228 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 244 Invalid, 0 Unknown, 68 Unchecked, 1.5s Time] [2022-03-20 09:26:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 09:26:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 09:26:03,628 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 09:26:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 09:26:03,628 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2022-03-20 09:26:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:26:03,628 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 09:26:03,628 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 09:26:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 09:26:03,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 09:26:03,631 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 09:26:03,643 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 09:26:03,836 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 09:26:03,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 09:26:30,804 WARN L232 SmtUtils]: Spent 26.91s on a formula simplification. DAG size of input: 114 DAG size of output: 38 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 09:26:44,710 WARN L232 SmtUtils]: Spent 13.83s on a formula simplification. DAG size of input: 134 DAG size of output: 45 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 09:26:45,092 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 09:26:45,092 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:26:45,093 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:26:45,093 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 09:26:45,093 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 09:26:45,093 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:26:45,093 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:26:45,093 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2022-03-20 09:26:45,093 INFO L882 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2022-03-20 09:26:45,093 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2022-03-20 09:26:45,093 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2022-03-20 09:26:45,093 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2022-03-20 09:26:45,093 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-20 09:26:45,093 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-20 09:26:45,093 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~X~0 100) (<= 0 main_~X~0)) [2022-03-20 09:26:45,093 INFO L882 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-03-20 09:26:45,093 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 main_~X~0))) (and (or .cse0 (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))) (or .cse0 (forall ((main_~Y~0 Int)) (= (* 2 (* main_~y~0 main_~x~0)) (+ (* (* main_~X~0 main_~y~0) 2) (* main_~y~0 2))))) (<= main_~X~0 100) (= (+ (* main_~Y~0 2) (* 2 (* main_~Y~0 main_~x~0))) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~Y~0 100))) [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2022-03-20 09:26:45,094 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (* main_~Y~0 2)) (.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~0 100) (= (+ .cse1 .cse4) (+ (* (* main_~X~0 main_~y~0) 2) main_~X~0 main_~v~0)) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~Y~0 100) (or (= (+ .cse0 (* main_~y~0 2) .cse4) (+ (* 2 (* main_~y~0 main_~x~0)) .cse2)) .cse3))) [2022-03-20 09:26:45,094 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse2 (* main_~y~0 2)) (.cse0 (* 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)) (= (+ .cse2 .cse0 (* 2 main_~yx~0)) (+ (* 2 main_~xy~0) main_~X~0 main_~v~0)) (= (+ (* 2 (* main_~y~0 main_~x~0)) main_~X~0 main_~v~0) (+ .cse2 .cse0 .cse1)))) [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point L50-1(line 50) no Hoare annotation was computed. [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2022-03-20 09:26:45,094 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2022-03-20 09:26:45,094 INFO L882 garLoopResultBuilder]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2022-03-20 09:26:45,095 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2022-03-20 09:26:45,095 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2022-03-20 09:26:45,097 INFO L719 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-03-20 09:26:45,098 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 09:26:45,103 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:26:45,103 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:26:45,108 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:26:45,108 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:26:45,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:26:45 BasicIcfg [2022-03-20 09:26:45,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 09:26:45,109 INFO L158 Benchmark]: Toolchain (without parser) took 110103.14ms. Allocated memory was 203.4MB in the beginning and 262.1MB in the end (delta: 58.7MB). Free memory was 149.6MB in the beginning and 171.1MB in the end (delta: -21.5MB). Peak memory consumption was 120.9MB. Max. memory is 8.0GB. [2022-03-20 09:26:45,109 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 203.4MB. Free memory was 165.7MB in the beginning and 165.6MB in the end (delta: 69.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 09:26:45,109 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.65ms. Allocated memory was 203.4MB in the beginning and 262.1MB in the end (delta: 58.7MB). Free memory was 149.5MB in the beginning and 238.7MB in the end (delta: -89.2MB). Peak memory consumption was 9.0MB. Max. memory is 8.0GB. [2022-03-20 09:26:45,110 INFO L158 Benchmark]: Boogie Preprocessor took 34.70ms. Allocated memory is still 262.1MB. Free memory was 238.7MB in the beginning and 237.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 09:26:45,110 INFO L158 Benchmark]: RCFGBuilder took 231.85ms. Allocated memory is still 262.1MB. Free memory was 237.1MB in the beginning and 226.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 09:26:45,110 INFO L158 Benchmark]: IcfgTransformer took 19.89ms. Allocated memory is still 262.1MB. Free memory was 226.1MB in the beginning and 225.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:26:45,110 INFO L158 Benchmark]: TraceAbstraction took 109588.33ms. Allocated memory is still 262.1MB. Free memory was 224.5MB in the beginning and 171.1MB in the end (delta: 53.4MB). Peak memory consumption was 136.7MB. Max. memory is 8.0GB. [2022-03-20 09:26:45,111 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 203.4MB. Free memory was 165.7MB in the beginning and 165.6MB in the end (delta: 69.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 219.65ms. Allocated memory was 203.4MB in the beginning and 262.1MB in the end (delta: 58.7MB). Free memory was 149.5MB in the beginning and 238.7MB in the end (delta: -89.2MB). Peak memory consumption was 9.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.70ms. Allocated memory is still 262.1MB. Free memory was 238.7MB in the beginning and 237.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 231.85ms. Allocated memory is still 262.1MB. Free memory was 237.1MB in the beginning and 226.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 19.89ms. Allocated memory is still 262.1MB. Free memory was 226.1MB in the beginning and 225.1MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 109588.33ms. Allocated memory is still 262.1MB. Free memory was 224.5MB in the beginning and 171.1MB in the end (delta: 53.4MB). Peak memory consumption was 136.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 109.5s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 26.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 41.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 14.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 140 mSDsluCounter, 1418 SdHoareTripleChecker+Invalid, 14.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 132 IncrementalHoareTripleChecker+Unchecked, 1226 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1168 IncrementalHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 192 mSDtfsCounter, 1168 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 632 GetRequests, 492 SyntacticMatches, 6 SemanticMatches, 134 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 29.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, InterpolantAutomatonStates: 103, 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, 43 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 29 PreInvPairs, 50 NumberOfFragments, 259 HoareAnnotationTreeSize, 29 FomulaSimplifications, 792 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4695 FormulaSimplificationTreeSizeReductionInter, 41.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 39.1s InterpolantComputationTime, 327 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 594 ConstructedInterpolants, 6 QuantifiedInterpolants, 3393 SizeOfPredicates, 50 NumberOfNonLiveVariables, 854 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 339/426 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 09:26:45,115 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:26:45,115 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:26:45,116 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] [2022-03-20 09:26:45,116 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~y~0,QUANTIFIED] Derived loop invariant: (((((((x <= 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 <= X || (forall main_~Y~0 : int :: 2 * (y * x) == X * y * 2 + y * 2))) && X <= 100) && Y * 2 + 2 * (Y * x) == X * y * 2 + X + v) && 0 <= Y) && 0 <= X) && Y <= 100 RESULT: Ultimate proved your program to be correct! [2022-03-20 09:26:45,340 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-20 09:26:45,367 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...