/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/hard2_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 11:00:39,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 11:00:39,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 11:00:39,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 11:00:39,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 11:00:39,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 11:00:39,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 11:00:39,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 11:00:39,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 11:00:39,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 11:00:39,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 11:00:39,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 11:00:39,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 11:00:39,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 11:00:39,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 11:00:39,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 11:00:39,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 11:00:39,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 11:00:39,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 11:00:39,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 11:00:39,783 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 11:00:39,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 11:00:39,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 11:00:39,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 11:00:39,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 11:00:39,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 11:00:39,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 11:00:39,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 11:00:39,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 11:00:39,798 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 11:00:39,830 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 11:00:39,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 11:00:39,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 11:00:39,833 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 11:00:39,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 11:00:39,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 11:00:39,835 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 11:00:39,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 11:00:39,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 11:00:39,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 11:00:39,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 11:00:39,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 11:00:39,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 11:00:39,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 11:00:39,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 11:00:39,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 11:00:39,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 11:00:39,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 11:00:39,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 11:00:39,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:00:39,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 11:00:39,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 11:00:39,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 11:00:39,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 11:00:39,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 11:00:39,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 11:00:39,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 11:00:39,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 11:00:39,840 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 11:00:39,841 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 11:00:40,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 11:00:40,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 11:00:40,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 11:00:40,126 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 11:00:40,126 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 11:00:40,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound100.c [2022-03-20 11:00:40,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f32753ef0/853a99d073fd48e8a5a4db545f3e6772/FLAGd04d46b48 [2022-03-20 11:00:40,542 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 11:00:40,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound100.c [2022-03-20 11:00:40,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f32753ef0/853a99d073fd48e8a5a4db545f3e6772/FLAGd04d46b48 [2022-03-20 11:00:40,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f32753ef0/853a99d073fd48e8a5a4db545f3e6772 [2022-03-20 11:00:40,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 11:00:40,970 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 11:00:40,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 11:00:40,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 11:00:40,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 11:00:40,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:00:40" (1/1) ... [2022-03-20 11:00:40,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf6f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:40, skipping insertion in model container [2022-03-20 11:00:40,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:00:40" (1/1) ... [2022-03-20 11:00:40,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 11:00:40,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 11:00:41,158 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/hard2_valuebound100.c[526,539] [2022-03-20 11:00:41,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:00:41,201 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 11:00:41,226 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/hard2_valuebound100.c[526,539] [2022-03-20 11:00:41,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:00:41,251 INFO L208 MainTranslator]: Completed translation [2022-03-20 11:00:41,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41 WrapperNode [2022-03-20 11:00:41,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 11:00:41,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 11:00:41,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 11:00:41,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 11:00:41,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41" (1/1) ... [2022-03-20 11:00:41,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41" (1/1) ... [2022-03-20 11:00:41,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41" (1/1) ... [2022-03-20 11:00:41,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41" (1/1) ... [2022-03-20 11:00:41,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41" (1/1) ... [2022-03-20 11:00:41,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41" (1/1) ... [2022-03-20 11:00:41,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41" (1/1) ... [2022-03-20 11:00:41,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 11:00:41,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 11:00:41,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 11:00:41,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 11:00:41,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41" (1/1) ... [2022-03-20 11:00:41,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:00:41,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:00:41,348 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 11:00:41,380 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 11:00:41,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 11:00:41,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 11:00:41,396 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 11:00:41,396 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 11:00:41,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 11:00:41,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 11:00:41,397 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 11:00:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 11:00:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 11:00:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 11:00:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 11:00:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 11:00:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 11:00:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 11:00:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 11:00:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 11:00:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 11:00:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 11:00:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 11:00:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 11:00:41,447 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 11:00:41,448 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 11:00:41,570 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 11:00:41,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 11:00:41,575 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 11:00:41,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:00:41 BoogieIcfgContainer [2022-03-20 11:00:41,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 11:00:41,577 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 11:00:41,577 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 11:00:41,578 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 11:00:41,580 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:00:41" (1/1) ... [2022-03-20 11:00:41,581 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 11:00:41,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:00:41 BasicIcfg [2022-03-20 11:00:41,595 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 11:00:41,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 11:00:41,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 11:00:41,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 11:00:41,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:00:40" (1/4) ... [2022-03-20 11:00:41,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c7d4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:00:41, skipping insertion in model container [2022-03-20 11:00:41,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:00:41" (2/4) ... [2022-03-20 11:00:41,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c7d4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:00:41, skipping insertion in model container [2022-03-20 11:00:41,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:00:41" (3/4) ... [2022-03-20 11:00:41,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c7d4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:00:41, skipping insertion in model container [2022-03-20 11:00:41,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:00:41" (4/4) ... [2022-03-20 11:00:41,602 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound100.cqvasr [2022-03-20 11:00:41,606 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 11:00:41,606 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 11:00:41,639 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 11:00:41,644 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 11:00:41,645 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 11:00:41,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 11:00:41,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 11:00:41,663 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:41,663 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:00:41,664 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:41,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2022-03-20 11:00:41,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:41,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270923231] [2022-03-20 11:00:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:41,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:41,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:00:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:41,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 11:00:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:00:41,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:00:41,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270923231] [2022-03-20 11:00:41,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270923231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:00:41,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:00:41,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 11:00:41,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135989976] [2022-03-20 11:00:41,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:00:41,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 11:00:41,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:00:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 11:00:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:00:41,849 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:00:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:00:41,971 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-03-20 11:00:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 11:00:41,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 11:00:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:00:41,988 INFO L225 Difference]: With dead ends: 61 [2022-03-20 11:00:41,988 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 11:00:41,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 11:00:41,993 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:00:41,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:00:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 11:00:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 11:00:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:00:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-03-20 11:00:42,045 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-03-20 11:00:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:00:42,045 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-03-20 11:00:42,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:00:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-03-20 11:00:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 11:00:42,047 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:42,047 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:00:42,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 11:00:42,048 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2022-03-20 11:00:42,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:42,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303137936] [2022-03-20 11:00:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:42,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:42,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:00:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:42,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 11:00:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:00:42,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:00:42,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303137936] [2022-03-20 11:00:42,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303137936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:00:42,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:00:42,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 11:00:42,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514033623] [2022-03-20 11:00:42,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:00:42,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 11:00:42,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:00:42,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 11:00:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:00:42,177 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:00:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:00:42,334 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-03-20 11:00:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 11:00:42,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 11:00:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:00:42,336 INFO L225 Difference]: With dead ends: 43 [2022-03-20 11:00:42,336 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 11:00:42,336 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:00:42,337 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:00:42,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:00:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 11:00:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-20 11:00:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 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 11:00:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-03-20 11:00:42,345 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-03-20 11:00:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:00:42,346 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-03-20 11:00:42,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:00:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-03-20 11:00:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 11:00:42,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:42,346 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:00:42,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 11:00:42,347 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:42,347 INFO L85 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2022-03-20 11:00:42,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:42,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850456044] [2022-03-20 11:00:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:42,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:42,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:00:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:42,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 11:00:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:42,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-20 11:00:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:00:42,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:00:42,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850456044] [2022-03-20 11:00:42,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850456044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:00:42,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:00:42,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 11:00:42,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075255154] [2022-03-20 11:00:42,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:00:42,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 11:00:42,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:00:42,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 11:00:42,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:00:42,411 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 11:00:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:00:42,539 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-20 11:00:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 11:00:42,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 11:00:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:00:42,541 INFO L225 Difference]: With dead ends: 47 [2022-03-20 11:00:42,541 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 11:00:42,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:00:42,542 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:00:42,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:00:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 11:00:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-03-20 11:00:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:00:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-03-20 11:00:42,548 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-03-20 11:00:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:00:42,548 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-03-20 11:00:42,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 11:00:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-03-20 11:00:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 11:00:42,549 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:42,549 INFO L499 BasicCegarLoop]: trace histogram [3, 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 11:00:42,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 11:00:42,549 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:42,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2022-03-20 11:00:42,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:42,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578540269] [2022-03-20 11:00:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:42,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:42,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:00:42,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301118121] [2022-03-20 11:00:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:42,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:42,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:00:42,575 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 11:00:42,576 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 11:00:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:42,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 11:00:42,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:00:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:00:42,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:00:42,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:00:42,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578540269] [2022-03-20 11:00:42,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:00:42,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301118121] [2022-03-20 11:00:42,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301118121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:00:42,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:00:42,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 11:00:42,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731094174] [2022-03-20 11:00:42,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:00:42,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:00:42,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:00:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:00:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:00:42,797 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 11:00:42,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:00:42,850 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-20 11:00:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:00:42,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-20 11:00:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:00:42,851 INFO L225 Difference]: With dead ends: 66 [2022-03-20 11:00:42,852 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 11:00:42,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:00:42,853 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:00:42,855 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 138 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:00:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 11:00:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 11:00:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 11:00:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-20 11:00:42,862 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-03-20 11:00:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:00:42,863 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-20 11:00:42,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 11:00:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-20 11:00:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 11:00:42,863 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:42,864 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:00:42,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 11:00:43,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:43,079 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2022-03-20 11:00:43,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:43,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952995072] [2022-03-20 11:00:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:43,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:43,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:00:43,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518382487] [2022-03-20 11:00:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:43,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:43,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:00:43,096 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 11:00:43,097 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 11:00:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:43,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:00:43,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:00:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:00:43,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:00:43,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:00:43,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952995072] [2022-03-20 11:00:43,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:00:43,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518382487] [2022-03-20 11:00:43,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518382487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:00:43,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:00:43,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 11:00:43,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203784059] [2022-03-20 11:00:43,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:00:43,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:00:43,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:00:43,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:00:43,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:00:43,303 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 11:00:43,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:00:43,347 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-03-20 11:00:43,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:00:43,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-20 11:00:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:00:43,348 INFO L225 Difference]: With dead ends: 65 [2022-03-20 11:00:43,348 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 11:00:43,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:00:43,353 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:00:43,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:00:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 11:00:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-20 11:00:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 11:00:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-03-20 11:00:43,375 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-03-20 11:00:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:00:43,376 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-03-20 11:00:43,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 11:00:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-03-20 11:00:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 11:00:43,378 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:43,378 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:00:43,411 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 11:00:43,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:43,598 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:43,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2022-03-20 11:00:43,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:43,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517144247] [2022-03-20 11:00:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:43,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:43,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:00:43,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698122329] [2022-03-20 11:00:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:43,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:43,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:00:43,617 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 11:00:43,625 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 11:00:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:43,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 11:00:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:00:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 11:00:43,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:00:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 11:00:43,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:00:43,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517144247] [2022-03-20 11:00:43,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:00:43,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698122329] [2022-03-20 11:00:43,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698122329] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 11:00:43,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:00:43,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 11:00:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771571203] [2022-03-20 11:00:43,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:00:43,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:00:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:00:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:00:43,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 11:00:43,970 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 11:00:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:00:44,011 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-03-20 11:00:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:00:44,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-03-20 11:00:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:00:44,014 INFO L225 Difference]: With dead ends: 69 [2022-03-20 11:00:44,014 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 11:00:44,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 11:00:44,015 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:00:44,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:00:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 11:00:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-03-20 11:00:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 11:00:44,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-03-20 11:00:44,024 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-03-20 11:00:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:00:44,024 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-03-20 11:00:44,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 11:00:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-03-20 11:00:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 11:00:44,026 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:44,026 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 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, 1] [2022-03-20 11:00:44,054 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 11:00:44,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:44,246 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2022-03-20 11:00:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:44,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582014406] [2022-03-20 11:00:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:44,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:44,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:00:44,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737724198] [2022-03-20 11:00:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:00:44,270 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 11:00:44,276 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 11:00:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:44,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 11:00:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:00:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 11:00:44,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:00:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 11:00:45,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:00:45,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582014406] [2022-03-20 11:00:45,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:00:45,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737724198] [2022-03-20 11:00:45,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737724198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:00:45,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:00:45,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 11:00:45,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387356044] [2022-03-20 11:00:45,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:00:45,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:00:45,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:00:45,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:00:45,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:00:45,443 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 11:00:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:00:49,941 INFO L93 Difference]: Finished difference Result 154 states and 210 transitions. [2022-03-20 11:00:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 11:00:49,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 64 [2022-03-20 11:00:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:00:49,944 INFO L225 Difference]: With dead ends: 154 [2022-03-20 11:00:49,944 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 11:00:49,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:00:49,945 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 11:00:49,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 299 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 11:00:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 11:00:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-03-20 11:00:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 11:00:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-03-20 11:00:49,994 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 64 [2022-03-20 11:00:49,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:00:49,995 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-03-20 11:00:49,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 11:00:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-03-20 11:00:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 11:00:49,996 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:49,996 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 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 11:00:50,023 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 11:00:50,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:50,214 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:50,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2022-03-20 11:00:50,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:50,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674454691] [2022-03-20 11:00:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:50,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:50,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:00:50,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495203874] [2022-03-20 11:00:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:50,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:50,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:00:50,247 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 11:00:50,267 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 11:00:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:50,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 11:00:50,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:00:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-20 11:00:50,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:00:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-20 11:00:50,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:00:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674454691] [2022-03-20 11:00:50,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:00:50,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495203874] [2022-03-20 11:00:50,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495203874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:00:50,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:00:50,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 11:00:50,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674991319] [2022-03-20 11:00:50,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:00:50,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 11:00:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:00:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 11:00:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:00:50,948 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 11:00:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:00:51,219 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2022-03-20 11:00:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 11:00:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 75 [2022-03-20 11:00:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:00:51,221 INFO L225 Difference]: With dead ends: 169 [2022-03-20 11:00:51,221 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 11:00:51,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-03-20 11:00:51,223 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 46 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:00:51,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 163 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:00:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 11:00:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2022-03-20 11:00:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 64 states have internal predecessors, (71), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 11:00:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-03-20 11:00:51,236 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 75 [2022-03-20 11:00:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:00:51,236 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-03-20 11:00:51,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 11:00:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-03-20 11:00:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 11:00:51,238 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:51,238 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:00:51,259 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 11:00:51,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:51,452 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1480109990, now seen corresponding path program 1 times [2022-03-20 11:00:51,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:51,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266838555] [2022-03-20 11:00:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:51,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:00:51,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020996691] [2022-03-20 11:00:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:51,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:51,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:00:51,465 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 11:00:51,466 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 11:00:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:00:51,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 11:00:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:00:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-20 11:00:51,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:00:51,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:00:51,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266838555] [2022-03-20 11:00:51,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:00:51,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020996691] [2022-03-20 11:00:51,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020996691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:00:51,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:00:51,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 11:00:51,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600709652] [2022-03-20 11:00:51,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:00:51,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:00:51,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:00:51,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:00:51,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:00:51,728 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 11:00:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:00:51,786 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2022-03-20 11:00:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:00:51,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2022-03-20 11:00:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:00:51,788 INFO L225 Difference]: With dead ends: 115 [2022-03-20 11:00:51,788 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 11:00:51,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:00:51,789 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:00:51,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 86 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:00:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 11:00:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 11:00:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 11:00:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2022-03-20 11:00:51,800 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 84 [2022-03-20 11:00:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:00:51,801 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2022-03-20 11:00:51,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 11:00:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2022-03-20 11:00:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 11:00:51,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:00:51,802 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 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] [2022-03-20 11:00:51,837 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 11:00:52,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:52,018 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:00:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:00:52,019 INFO L85 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 2 times [2022-03-20 11:00:52,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:00:52,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813525799] [2022-03-20 11:00:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:00:52,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:00:52,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:00:52,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834412790] [2022-03-20 11:00:52,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:00:52,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:00:52,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:00:52,029 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 11:00:52,031 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 11:00:52,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:00:52,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:00:52,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 11:00:52,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:00:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 11:00:52,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:01:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 11:01:14,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:01:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813525799] [2022-03-20 11:01:14,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:01:14,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834412790] [2022-03-20 11:01:14,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834412790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:01:14,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:01:14,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 11:01:14,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057179683] [2022-03-20 11:01:14,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:01:14,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 11:01:14,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:01:14,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 11:01:14,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 11:01:14,595 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-03-20 11:01:21,535 WARN L232 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 192 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 11:01:28,876 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 11:01:30,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 11:01:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:01:30,188 INFO L93 Difference]: Finished difference Result 228 states and 305 transitions. [2022-03-20 11:01:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 11:01:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 94 [2022-03-20 11:01:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:01:30,191 INFO L225 Difference]: With dead ends: 228 [2022-03-20 11:01:30,191 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 11:01:30,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-03-20 11:01:30,192 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 94 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 198 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:01:30,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 556 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 512 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-03-20 11:01:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 11:01:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 166. [2022-03-20 11:01:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 100 states have (on average 1.21) internal successors, (121), 104 states have internal predecessors, (121), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 11:01:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 217 transitions. [2022-03-20 11:01:30,210 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 217 transitions. Word has length 94 [2022-03-20 11:01:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:01:30,211 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 217 transitions. [2022-03-20 11:01:30,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 11 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-03-20 11:01:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 217 transitions. [2022-03-20 11:01:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 11:01:30,212 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:01:30,212 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 11:01:30,237 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 11:01:30,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:01:30,413 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:01:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:01:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash 411415430, now seen corresponding path program 1 times [2022-03-20 11:01:30,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:01:30,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818836326] [2022-03-20 11:01:30,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:01:30,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:01:30,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:01:30,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055380927] [2022-03-20 11:01:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:01:30,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:01:30,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:01:30,439 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:01:30,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 11:01:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:01:30,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 11:01:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:01:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 11:01:30,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:01:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 11:01:31,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:01:31,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818836326] [2022-03-20 11:01:31,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:01:31,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055380927] [2022-03-20 11:01:31,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055380927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:01:31,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:01:31,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 11:01:31,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913930878] [2022-03-20 11:01:31,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:01:31,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:01:31,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:01:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:01:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:01:31,436 INFO L87 Difference]: Start difference. First operand 166 states and 217 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-03-20 11:01:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:01:31,607 INFO L93 Difference]: Finished difference Result 182 states and 239 transitions. [2022-03-20 11:01:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 11:01:31,607 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) Word has length 110 [2022-03-20 11:01:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:01:31,611 INFO L225 Difference]: With dead ends: 182 [2022-03-20 11:01:31,611 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 11:01:31,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-20 11:01:31,613 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:01:31,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 390 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:01:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 11:01:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-20 11:01:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 104 states have (on average 1.2019230769230769) internal successors, (125), 108 states have internal predecessors, (125), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 11:01:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-03-20 11:01:31,635 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 110 [2022-03-20 11:01:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:01:31,635 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-03-20 11:01:31,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 7 states have call predecessors, (34), 7 states have call successors, (34) [2022-03-20 11:01:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-03-20 11:01:31,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 11:01:31,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:01:31,637 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:01:31,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 11:01:31,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 11:01:31,843 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:01:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:01:31,844 INFO L85 PathProgramCache]: Analyzing trace with hash 564418017, now seen corresponding path program 2 times [2022-03-20 11:01:31,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:01:31,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463211655] [2022-03-20 11:01:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:01:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:01:31,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:01:31,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895803753] [2022-03-20 11:01:31,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:01:31,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:01:31,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:01:31,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:01:31,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 11:01:31,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:01:31,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:01:31,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 11:01:31,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:01:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-03-20 11:01:32,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:01:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-20 11:01:32,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:01:32,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463211655] [2022-03-20 11:01:32,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:01:32,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895803753] [2022-03-20 11:01:32,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895803753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:01:32,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:01:32,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-20 11:01:32,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23199753] [2022-03-20 11:01:32,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:01:32,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 11:01:32,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:01:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 11:01:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 11:01:32,430 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-03-20 11:01:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:01:32,515 INFO L93 Difference]: Finished difference Result 203 states and 266 transitions. [2022-03-20 11:01:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:01:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 123 [2022-03-20 11:01:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:01:32,518 INFO L225 Difference]: With dead ends: 203 [2022-03-20 11:01:32,518 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 11:01:32,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 11:01:32,519 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:01:32,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 203 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:01:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 11:01:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-03-20 11:01:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 86 states have internal predecessors, (95), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 11:01:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 167 transitions. [2022-03-20 11:01:32,538 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 167 transitions. Word has length 123 [2022-03-20 11:01:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:01:32,541 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 167 transitions. [2022-03-20 11:01:32,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-03-20 11:01:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 167 transitions. [2022-03-20 11:01:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 11:01:32,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:01:32,545 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:01:32,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 11:01:32,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:01:32,766 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:01:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:01:32,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1567600662, now seen corresponding path program 3 times [2022-03-20 11:01:32,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:01:32,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870130417] [2022-03-20 11:01:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:01:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:01:32,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:01:32,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782071384] [2022-03-20 11:01:32,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:01:32,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:01:32,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:01:32,783 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:01:32,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 11:01:32,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 11:01:32,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:01:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 11:01:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:01:33,292 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 11:01:33,340 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 11:01:33,443 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 11:01:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-20 11:01:33,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:01:43,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:01:43,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870130417] [2022-03-20 11:01:43,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:01:43,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782071384] [2022-03-20 11:01:43,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782071384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:01:43,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:01:43,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 11:01:43,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493387529] [2022-03-20 11:01:43,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:01:43,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 11:01:43,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:01:43,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 11:01:43,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 11:01:43,797 INFO L87 Difference]: Start difference. First operand 136 states and 167 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 11:01:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:01:43,909 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2022-03-20 11:01:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 11:01:43,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 124 [2022-03-20 11:01:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:01:43,910 INFO L225 Difference]: With dead ends: 142 [2022-03-20 11:01:43,910 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 11:01:43,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:01:43,911 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:01:43,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 114 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:01:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 11:01:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2022-03-20 11:01:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 29 states have call successors, (29), 17 states have call predecessors, (29), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 11:01:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2022-03-20 11:01:43,920 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 124 [2022-03-20 11:01:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:01:43,920 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2022-03-20 11:01:43,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 11:01:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2022-03-20 11:01:43,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 11:01:43,921 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:01:43,921 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:01:43,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 11:01:44,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 11:01:44,123 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:01:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:01:44,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1333998901, now seen corresponding path program 3 times [2022-03-20 11:01:44,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:01:44,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845942946] [2022-03-20 11:01:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:01:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:01:44,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:01:44,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15485463] [2022-03-20 11:01:44,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:01:44,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:01:44,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:01:44,140 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:01:44,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 11:01:44,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 11:01:44,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:01:44,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 11:01:44,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:01:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-03-20 11:01:44,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:01:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-03-20 11:01:44,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:01:44,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845942946] [2022-03-20 11:01:44,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:01:44,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15485463] [2022-03-20 11:01:44,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15485463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:01:44,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:01:44,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 11:01:44,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796979734] [2022-03-20 11:01:44,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:01:44,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 11:01:44,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:01:44,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 11:01:44,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:01:44,565 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 11:01:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:01:44,676 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2022-03-20 11:01:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 11:01:44,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) Word has length 127 [2022-03-20 11:01:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:01:44,678 INFO L225 Difference]: With dead ends: 126 [2022-03-20 11:01:44,679 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 11:01:44,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:01:44,681 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:01:44,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 179 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:01:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 11:01:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 11:01:44,681 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 11:01:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 11:01:44,682 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 127 [2022-03-20 11:01:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:01:44,682 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 11:01:44,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 4 states have call successors, (16) [2022-03-20 11:01:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 11:01:44,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 11:01:44,685 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 11:01:44,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 11:01:44,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 11:01:44,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 11:01:55,618 WARN L232 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 149 DAG size of output: 32 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 11:01:56,767 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 11:01:56,767 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 11:01:56,767 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 11:01:56,767 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 11:01:56,767 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 11:01:56,767 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 11:01:56,767 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 11:01:56,768 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-20 11:01:56,768 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-20 11:01:56,768 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-20 11:01:56,768 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-20 11:01:56,768 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 61) the Hoare annotation is: true [2022-03-20 11:01:56,768 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-03-20 11:01:56,768 INFO L882 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2022-03-20 11:01:56,768 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-03-20 11:01:56,768 INFO L882 garLoopResultBuilder]: For program point L52-2(lines 22 61) no Hoare annotation was computed. [2022-03-20 11:01:56,768 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-03-20 11:01:56,768 INFO L878 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (<= 1 main_~B~0) (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 1 main_~p~0) (= main_~B~0 main_~d~0)) [2022-03-20 11:01:56,768 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= (* main_~B~0 main_~p~0) main_~d~0) (<= 1 main_~p~0) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-03-20 11:01:56,768 INFO L878 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-03-20 11:01:56,768 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= main_~B~0 main_~d~0))) (or (and (= main_~B~0 1) .cse0 (= main_~p~0 1)) (and (<= 1 main_~B~0) (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 1 main_~p~0) .cse0))) [2022-03-20 11:01:56,768 INFO L878 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse1 (* main_~B~0 main_~q~0))) (let ((.cse0 (div main_~p~0 2)) (.cse2 (= (+ .cse1 main_~r~0) main_~A~0))) (or (and (<= 1 .cse0) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse1 main_~r~0)) (= main_~B~0 1) .cse2) (and (= (let ((.cse3 (div main_~d~0 2))) (+ (div .cse3 2) main_~A~0 .cse3)) (+ .cse1 main_~r~0 (* main_~B~0 (div .cse0 2)) (* main_~B~0 .cse0))) (<= 1 main_~B~0) .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1))))) [2022-03-20 11:01:56,769 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 61) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 61) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-03-20 11:01:56,769 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-03-20 11:01:56,771 INFO L719 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:01:56,772 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 11:01:56,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:01:56 BasicIcfg [2022-03-20 11:01:56,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 11:01:56,791 INFO L158 Benchmark]: Toolchain (without parser) took 75821.00ms. Allocated memory was 181.4MB in the beginning and 276.8MB in the end (delta: 95.4MB). Free memory was 121.9MB in the beginning and 128.1MB in the end (delta: -6.2MB). Peak memory consumption was 136.9MB. Max. memory is 8.0GB. [2022-03-20 11:01:56,791 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 181.4MB. Free memory was 137.8MB in the beginning and 137.6MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 11:01:56,791 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.37ms. Allocated memory was 181.4MB in the beginning and 230.7MB in the end (delta: 49.3MB). Free memory was 121.8MB in the beginning and 202.6MB in the end (delta: -80.8MB). Peak memory consumption was 13.0MB. Max. memory is 8.0GB. [2022-03-20 11:01:56,792 INFO L158 Benchmark]: Boogie Preprocessor took 30.82ms. Allocated memory is still 230.7MB. Free memory was 202.6MB in the beginning and 201.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 11:01:56,792 INFO L158 Benchmark]: RCFGBuilder took 278.99ms. Allocated memory is still 230.7MB. Free memory was 201.1MB in the beginning and 189.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 11:01:56,793 INFO L158 Benchmark]: IcfgTransformer took 18.57ms. Allocated memory is still 230.7MB. Free memory was 189.5MB in the beginning and 188.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 11:01:56,793 INFO L158 Benchmark]: TraceAbstraction took 75193.66ms. Allocated memory was 230.7MB in the beginning and 276.8MB in the end (delta: 46.1MB). Free memory was 187.9MB in the beginning and 128.1MB in the end (delta: 59.8MB). Peak memory consumption was 153.7MB. Max. memory is 8.0GB. [2022-03-20 11:01:56,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 181.4MB. Free memory was 137.8MB in the beginning and 137.6MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 282.37ms. Allocated memory was 181.4MB in the beginning and 230.7MB in the end (delta: 49.3MB). Free memory was 121.8MB in the beginning and 202.6MB in the end (delta: -80.8MB). Peak memory consumption was 13.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.82ms. Allocated memory is still 230.7MB. Free memory was 202.6MB in the beginning and 201.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 278.99ms. Allocated memory is still 230.7MB. Free memory was 201.1MB in the beginning and 189.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 18.57ms. Allocated memory is still 230.7MB. Free memory was 189.5MB in the beginning and 188.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 75193.66ms. Allocated memory was 230.7MB in the beginning and 276.8MB in the end (delta: 46.1MB). Free memory was 187.9MB in the beginning and 128.1MB in the end (delta: 59.8MB). Peak memory consumption was 153.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 75.1s, OverallIterations: 14, TraceHistogramMax: 20, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 21.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 11.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 419 SdHoareTripleChecker+Valid, 8.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 348 mSDsluCounter, 2490 SdHoareTripleChecker+Invalid, 8.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1922 mSDsCounter, 467 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1843 IncrementalHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 467 mSolverCounterUnsat, 568 mSDtfsCounter, 1843 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1452 SyntacticMatches, 22 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 19.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=174occurred in iteration=11, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 128 PreInvPairs, 188 NumberOfFragments, 455 HoareAnnotationTreeSize, 128 FomulaSimplifications, 518 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 15 FomulaSimplificationsInter, 13290 FormulaSimplificationTreeSizeReductionInter, 11.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 38.0s InterpolantComputationTime, 962 NumberOfCodeBlocks, 840 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1578 ConstructedInterpolants, 0 QuantifiedInterpolants, 16023 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1954 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 6338/6540 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: 34]: Loop Invariant Derived loop invariant: (((((q == 0 && B == 1) && B * q + r == A) && B == d) && p == 1) || ((((B * 2 == d && p == 2) && q == 0) && B == 1) && B * q + r == A)) || ((((1 <= p / 2 / 2 && A + d == B * p + B * q + r) && q == 0) && B == 1) && B * q + r == A) RESULT: Ultimate proved your program to be correct! [2022-03-20 11:01:56,862 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...