/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/egcd2-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:45:00,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:45:00,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:45:00,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:45:00,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:45:00,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:45:00,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:45:00,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:45:00,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:45:00,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:45:00,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:45:00,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:45:00,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:45:00,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:45:00,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:45:00,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:45:00,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:45:00,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:45:00,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:45:00,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:45:00,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:45:00,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:45:00,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:45:00,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:45:00,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 22:45:00,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:45:00,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:45:00,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:45:00,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:45:00,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:45:00,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:45:00,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:45:00,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:45:00,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:45:00,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:45:00,360 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:45:00,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:45:00,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:45:00,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:45:00,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:45:00,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:45:00,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:45:00,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:45:00,361 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:45:00,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:45:00,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:45:00,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:45:00,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:45:00,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:45:00,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:45:00,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:45:00,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:45:00,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:45:00,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:45:00,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:45:00,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:45:00,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:45:00,363 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:45:00,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:45:00,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:45:00,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:45:00,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:45:00,582 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:45:00,584 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:45:00,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2022-02-23 22:45:00,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd142bb8/1ed93377bc8241e59f805eace918c976/FLAG8f96f998f [2022-02-23 22:45:00,975 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:45:00,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c [2022-02-23 22:45:00,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd142bb8/1ed93377bc8241e59f805eace918c976/FLAG8f96f998f [2022-02-23 22:45:00,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fd142bb8/1ed93377bc8241e59f805eace918c976 [2022-02-23 22:45:00,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:45:00,998 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:45:01,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:45:01,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:45:01,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:45:01,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:45:00" (1/1) ... [2022-02-23 22:45:01,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434549fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01, skipping insertion in model container [2022-02-23 22:45:01,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:45:00" (1/1) ... [2022-02-23 22:45:01,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:45:01,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:45:01,153 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] [2022-02-23 22:45:01,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:45:01,189 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:45:01,198 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/egcd2-ll_valuebound2.c[490,503] [2022-02-23 22:45:01,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:45:01,227 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:45:01,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01 WrapperNode [2022-02-23 22:45:01,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:45:01,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:45:01,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:45:01,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:45:01,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01" (1/1) ... [2022-02-23 22:45:01,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01" (1/1) ... [2022-02-23 22:45:01,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01" (1/1) ... [2022-02-23 22:45:01,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01" (1/1) ... [2022-02-23 22:45:01,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01" (1/1) ... [2022-02-23 22:45:01,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01" (1/1) ... [2022-02-23 22:45:01,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01" (1/1) ... [2022-02-23 22:45:01,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:45:01,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:45:01,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:45:01,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:45:01,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01" (1/1) ... [2022-02-23 22:45:01,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:45:01,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:01,291 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) [2022-02-23 22:45:01,297 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 [2022-02-23 22:45:01,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:45:01,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:45:01,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:45:01,318 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:45:01,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:45:01,318 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:45:01,318 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:45:01,318 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:45:01,318 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:45:01,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:45:01,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 22:45:01,318 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:45:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:45:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:45:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:45:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:45:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:45:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:45:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:45:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:45:01,360 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:45:01,361 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:45:01,521 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:45:01,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:45:01,525 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 22:45:01,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:45:01 BoogieIcfgContainer [2022-02-23 22:45:01,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:45:01,527 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:45:01,527 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:45:01,540 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:45:01,542 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:45:01" (1/1) ... [2022-02-23 22:45:01,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:45:01 BasicIcfg [2022-02-23 22:45:01,565 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:45:01,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:45:01,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:45:01,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:45:01,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:45:00" (1/4) ... [2022-02-23 22:45:01,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be9dbb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:45:01, skipping insertion in model container [2022-02-23 22:45:01,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:01" (2/4) ... [2022-02-23 22:45:01,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be9dbb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:45:01, skipping insertion in model container [2022-02-23 22:45:01,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:45:01" (3/4) ... [2022-02-23 22:45:01,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be9dbb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:45:01, skipping insertion in model container [2022-02-23 22:45:01,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:45:01" (4/4) ... [2022-02-23 22:45:01,570 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.cqvasr [2022-02-23 22:45:01,589 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:45:01,589 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:45:01,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:45:01,641 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:45:01,642 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:45:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 22:45:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 22:45:01,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:01,665 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:01,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:01,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:01,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-02-23 22:45:01,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:01,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148285442] [2022-02-23 22:45:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:01,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:01,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:45:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:01,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:45:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:01,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 22:45:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:01,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 22:45:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 22:45:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-23 22:45:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-23 22:45:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 22:45:01,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:01,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148285442] [2022-02-23 22:45:01,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148285442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:01,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:01,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:45:01,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122707172] [2022-02-23 22:45:01,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:01,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:45:01,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:45:01,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:45:01,915 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:45:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:02,005 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-02-23 22:45:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:45:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-02-23 22:45:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:02,012 INFO L225 Difference]: With dead ends: 73 [2022-02-23 22:45:02,013 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 22:45:02,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:45:02,019 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:02,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 22:45:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 22:45:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 22:45:02,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-23 22:45:02,049 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-02-23 22:45:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:02,050 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-23 22:45:02,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:45:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-23 22:45:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 22:45:02,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:02,051 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:02,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:45:02,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:02,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-02-23 22:45:02,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:02,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586884245] [2022-02-23 22:45:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:02,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:02,066 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:02,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948945869] [2022-02-23 22:45:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:02,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:02,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:02,069 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) [2022-02-23 22:45:02,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:45:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:02,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:45:02,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 22:45:02,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 22:45:02,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:02,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586884245] [2022-02-23 22:45:02,345 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:02,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948945869] [2022-02-23 22:45:02,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948945869] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:02,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:02,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-02-23 22:45:02,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734082134] [2022-02-23 22:45:02,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:02,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:45:02,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:02,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:45:02,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:45:02,347 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:45:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:02,430 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-02-23 22:45:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:45:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-02-23 22:45:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:02,432 INFO L225 Difference]: With dead ends: 52 [2022-02-23 22:45:02,432 INFO L226 Difference]: Without dead ends: 44 [2022-02-23 22:45:02,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-23 22:45:02,434 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:02,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 184 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-23 22:45:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-23 22:45:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 22:45:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-02-23 22:45:02,454 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-02-23 22:45:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:02,454 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-02-23 22:45:02,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:45:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-02-23 22:45:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 22:45:02,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:02,457 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:02,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 22:45:02,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:02,674 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-02-23 22:45:02,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:02,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665810979] [2022-02-23 22:45:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:02,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:02,686 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:02,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818087543] [2022-02-23 22:45:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:02,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:02,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:02,688 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) [2022-02-23 22:45:02,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:45:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:02,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 22:45:02,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 22:45:02,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 22:45:02,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:02,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665810979] [2022-02-23 22:45:02,955 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:02,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818087543] [2022-02-23 22:45:02,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818087543] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:45:02,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:45:02,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 22:45:02,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647887466] [2022-02-23 22:45:02,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:02,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:45:02,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:02,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:45:02,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:45:02,957 INFO L87 Difference]: Start difference. First operand 37 states and 48 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 22:45:03,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:03,017 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-23 22:45:03,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:45:03,017 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-02-23 22:45:03,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:03,018 INFO L225 Difference]: With dead ends: 43 [2022-02-23 22:45:03,018 INFO L226 Difference]: Without dead ends: 41 [2022-02-23 22:45:03,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:45:03,019 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:03,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-23 22:45:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-23 22:45:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 22:45:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-02-23 22:45:03,034 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-02-23 22:45:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:03,034 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-02-23 22:45:03,034 INFO L471 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 22:45:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-02-23 22:45:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 22:45:03,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:03,035 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:03,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:03,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 22:45:03,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:03,252 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-02-23 22:45:03,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:03,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233840418] [2022-02-23 22:45:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:03,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:03,261 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:03,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448316116] [2022-02-23 22:45:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:03,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:03,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:03,263 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) [2022-02-23 22:45:03,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 22:45:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 22:45:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 22:45:03,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:03,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:03,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233840418] [2022-02-23 22:45:03,542 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:03,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448316116] [2022-02-23 22:45:03,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448316116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:45:03,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:45:03,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-23 22:45:03,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116031267] [2022-02-23 22:45:03,543 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:03,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 22:45:03,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:03,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 22:45:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:45:03,544 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 22:45:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:03,687 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-02-23 22:45:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 22:45:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-02-23 22:45:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:03,688 INFO L225 Difference]: With dead ends: 54 [2022-02-23 22:45:03,688 INFO L226 Difference]: Without dead ends: 52 [2022-02-23 22:45:03,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:45:03,689 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:03,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-23 22:45:03,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-02-23 22:45:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 22:45:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-02-23 22:45:03,696 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-02-23 22:45:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:03,696 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-02-23 22:45:03,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 22:45:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-02-23 22:45:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 22:45:03,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:03,697 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 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, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:03,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:03,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:03,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-02-23 22:45:03,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:03,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035622583] [2022-02-23 22:45:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:03,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:03,922 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:03,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512229841] [2022-02-23 22:45:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:03,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:03,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:03,925 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) [2022-02-23 22:45:03,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 22:45:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 22:45:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-02-23 22:45:04,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-23 22:45:04,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:04,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035622583] [2022-02-23 22:45:04,388 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:04,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512229841] [2022-02-23 22:45:04,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512229841] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:45:04,388 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:45:04,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 13 [2022-02-23 22:45:04,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702249655] [2022-02-23 22:45:04,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:04,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:45:04,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:45:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-23 22:45:04,389 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-23 22:45:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:04,446 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-02-23 22:45:04,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:45:04,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2022-02-23 22:45:04,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:04,447 INFO L225 Difference]: With dead ends: 58 [2022-02-23 22:45:04,447 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 22:45:04,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:45:04,448 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 12 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:04,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 162 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:04,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 22:45:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-23 22:45:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 22:45:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-23 22:45:04,454 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-02-23 22:45:04,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:04,455 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-23 22:45:04,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-23 22:45:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-23 22:45:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-23 22:45:04,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:04,456 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:04,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:04,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:04,674 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:04,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-02-23 22:45:04,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:04,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722366645] [2022-02-23 22:45:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:04,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:04,683 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:04,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183412837] [2022-02-23 22:45:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:04,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:04,685 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) [2022-02-23 22:45:04,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 22:45:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 22:45:04,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-02-23 22:45:04,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:04,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:04,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722366645] [2022-02-23 22:45:04,984 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:04,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183412837] [2022-02-23 22:45:04,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183412837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:45:04,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:45:04,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-23 22:45:04,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673995719] [2022-02-23 22:45:04,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:04,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 22:45:04,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 22:45:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-23 22:45:04,986 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-23 22:45:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:05,062 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-02-23 22:45:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 22:45:05,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-02-23 22:45:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:05,063 INFO L225 Difference]: With dead ends: 62 [2022-02-23 22:45:05,064 INFO L226 Difference]: Without dead ends: 60 [2022-02-23 22:45:05,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:45:05,064 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:05,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-23 22:45:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-02-23 22:45:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 22:45:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-02-23 22:45:05,070 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-02-23 22:45:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:05,071 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-02-23 22:45:05,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-23 22:45:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-02-23 22:45:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-23 22:45:05,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:05,072 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:05,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:05,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:05,286 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-02-23 22:45:05,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:05,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570434129] [2022-02-23 22:45:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:05,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:05,295 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:05,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135715069] [2022-02-23 22:45:05,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:05,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:05,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:05,297 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) [2022-02-23 22:45:05,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 22:45:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:05,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:45:05,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-02-23 22:45:05,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-02-23 22:45:05,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:05,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570434129] [2022-02-23 22:45:05,547 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:05,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135715069] [2022-02-23 22:45:05,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135715069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:05,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:05,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 22:45:05,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978425564] [2022-02-23 22:45:05,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:05,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 22:45:05,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 22:45:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 22:45:05,549 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-23 22:45:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:05,677 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-02-23 22:45:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 22:45:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-02-23 22:45:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:05,679 INFO L225 Difference]: With dead ends: 106 [2022-02-23 22:45:05,679 INFO L226 Difference]: Without dead ends: 98 [2022-02-23 22:45:05,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:45:05,680 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:05,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-23 22:45:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-02-23 22:45:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-23 22:45:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-02-23 22:45:05,689 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-02-23 22:45:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:05,690 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-02-23 22:45:05,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-23 22:45:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-02-23 22:45:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-23 22:45:05,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:05,691 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:05,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:05,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:05,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-02-23 22:45:05,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:05,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408286872] [2022-02-23 22:45:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:05,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:05,918 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:05,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657317927] [2022-02-23 22:45:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:05,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:05,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:05,922 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) [2022-02-23 22:45:05,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 22:45:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 22:45:05,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 22:45:06,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 22:45:06,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:06,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408286872] [2022-02-23 22:45:06,234 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:06,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657317927] [2022-02-23 22:45:06,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657317927] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:06,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:06,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-02-23 22:45:06,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875037593] [2022-02-23 22:45:06,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:06,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 22:45:06,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:06,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 22:45:06,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:45:06,235 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 22:45:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:06,538 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2022-02-23 22:45:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 22:45:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-02-23 22:45:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:06,541 INFO L225 Difference]: With dead ends: 132 [2022-02-23 22:45:06,541 INFO L226 Difference]: Without dead ends: 128 [2022-02-23 22:45:06,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-23 22:45:06,542 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 33 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:06,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 267 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:45:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-23 22:45:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-02-23 22:45:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-23 22:45:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-02-23 22:45:06,554 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-02-23 22:45:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:06,554 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-02-23 22:45:06,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 22:45:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-02-23 22:45:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-23 22:45:06,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:06,555 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:06,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:06,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:06,756 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:06,757 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-02-23 22:45:06,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:06,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241491743] [2022-02-23 22:45:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:06,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:06,765 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:06,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323826447] [2022-02-23 22:45:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:45:06,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:06,773 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) [2022-02-23 22:45:06,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 22:45:06,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:45:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:45:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 22:45:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-02-23 22:45:07,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:07,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:07,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241491743] [2022-02-23 22:45:07,441 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:07,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323826447] [2022-02-23 22:45:07,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323826447] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:45:07,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:45:07,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-02-23 22:45:07,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051894983] [2022-02-23 22:45:07,441 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:07,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 22:45:07,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:07,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 22:45:07,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-02-23 22:45:07,442 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-02-23 22:45:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:07,719 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-02-23 22:45:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 22:45:07,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 80 [2022-02-23 22:45:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:07,721 INFO L225 Difference]: With dead ends: 128 [2022-02-23 22:45:07,721 INFO L226 Difference]: Without dead ends: 126 [2022-02-23 22:45:07,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-23 22:45:07,721 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:07,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 283 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:45:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-23 22:45:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-02-23 22:45:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 67 states have (on average 1.164179104477612) internal successors, (78), 69 states have internal predecessors, (78), 44 states have call successors, (44), 12 states have call predecessors, (44), 11 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 22:45:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2022-02-23 22:45:07,733 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 80 [2022-02-23 22:45:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:07,734 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2022-02-23 22:45:07,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-02-23 22:45:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2022-02-23 22:45:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-23 22:45:07,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:07,735 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2022-02-23 22:45:07,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:07,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 22:45:07,944 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:07,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-02-23 22:45:07,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:07,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889768958] [2022-02-23 22:45:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:07,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:07,952 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:07,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109545236] [2022-02-23 22:45:07,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:45:07,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:07,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:07,953 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) [2022-02-23 22:45:07,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 22:45:07,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 22:45:07,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:45:07,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-23 22:45:07,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-02-23 22:45:08,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:08,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:08,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889768958] [2022-02-23 22:45:08,466 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:08,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109545236] [2022-02-23 22:45:08,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109545236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:45:08,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:45:08,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 22:45:08,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16075019] [2022-02-23 22:45:08,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:08,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 22:45:08,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 22:45:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:45:08,468 INFO L87 Difference]: Start difference. First operand 123 states and 164 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-23 22:45:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:08,642 INFO L93 Difference]: Finished difference Result 132 states and 172 transitions. [2022-02-23 22:45:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 22:45:08,642 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), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-02-23 22:45:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:08,643 INFO L225 Difference]: With dead ends: 132 [2022-02-23 22:45:08,643 INFO L226 Difference]: Without dead ends: 130 [2022-02-23 22:45:08,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:45:08,644 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:08,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 262 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-23 22:45:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-02-23 22:45:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 72 states have internal predecessors, (81), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 22:45:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2022-02-23 22:45:08,655 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 85 [2022-02-23 22:45:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:08,655 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2022-02-23 22:45:08,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-23 22:45:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2022-02-23 22:45:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 22:45:08,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:08,656 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:08,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:08,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 22:45:08,871 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:08,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:08,872 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-02-23 22:45:08,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:08,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126671955] [2022-02-23 22:45:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:08,880 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:08,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787194773] [2022-02-23 22:45:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:08,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:08,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:08,881 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) [2022-02-23 22:45:08,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 22:45:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:08,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 22:45:08,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-23 22:45:09,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-23 22:45:09,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:09,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126671955] [2022-02-23 22:45:09,625 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:09,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787194773] [2022-02-23 22:45:09,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787194773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:09,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:09,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-02-23 22:45:09,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455999812] [2022-02-23 22:45:09,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:09,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 22:45:09,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:09,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 22:45:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:45:09,627 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-23 22:45:12,271 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 [] [2022-02-23 22:45:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:13,808 INFO L93 Difference]: Finished difference Result 250 states and 362 transitions. [2022-02-23 22:45:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-23 22:45:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-02-23 22:45:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:13,810 INFO L225 Difference]: With dead ends: 250 [2022-02-23 22:45:13,810 INFO L226 Difference]: Without dead ends: 246 [2022-02-23 22:45:13,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-02-23 22:45:13,811 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 49 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:13,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 611 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 525 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-02-23 22:45:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-02-23 22:45:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 241. [2022-02-23 22:45:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 125 states have (on average 1.216) internal successors, (152), 127 states have internal predecessors, (152), 100 states have call successors, (100), 16 states have call predecessors, (100), 15 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2022-02-23 22:45:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 350 transitions. [2022-02-23 22:45:13,843 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 350 transitions. Word has length 91 [2022-02-23 22:45:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:13,844 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 350 transitions. [2022-02-23 22:45:13,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-23 22:45:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 350 transitions. [2022-02-23 22:45:13,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-23 22:45:13,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:13,844 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:13,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:14,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 22:45:14,059 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:14,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1452951817, now seen corresponding path program 4 times [2022-02-23 22:45:14,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:14,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68818837] [2022-02-23 22:45:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:14,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:14,070 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:14,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754126487] [2022-02-23 22:45:14,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 22:45:14,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:14,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:14,075 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) [2022-02-23 22:45:14,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 22:45:14,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 22:45:14,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:45:14,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 22:45:14,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 22:45:14,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:14,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:14,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68818837] [2022-02-23 22:45:14,233 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:14,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754126487] [2022-02-23 22:45:14,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754126487] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:14,233 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:14,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:45:14,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777743796] [2022-02-23 22:45:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:14,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:45:14,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:45:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:45:14,234 INFO L87 Difference]: Start difference. First operand 241 states and 350 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-02-23 22:45:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:14,304 INFO L93 Difference]: Finished difference Result 315 states and 459 transitions. [2022-02-23 22:45:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:45:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2022-02-23 22:45:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:14,305 INFO L225 Difference]: With dead ends: 315 [2022-02-23 22:45:14,305 INFO L226 Difference]: Without dead ends: 206 [2022-02-23 22:45:14,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:45:14,307 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:14,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-23 22:45:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 186. [2022-02-23 22:45:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 98 states have internal predecessors, (112), 73 states have call successors, (73), 16 states have call predecessors, (73), 15 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-02-23 22:45:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 256 transitions. [2022-02-23 22:45:14,351 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 256 transitions. Word has length 105 [2022-02-23 22:45:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:14,352 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 256 transitions. [2022-02-23 22:45:14,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-02-23 22:45:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 256 transitions. [2022-02-23 22:45:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-23 22:45:14,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:14,352 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:14,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:14,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 22:45:14,570 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:14,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-02-23 22:45:14,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:14,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325312088] [2022-02-23 22:45:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:14,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:14,577 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:14,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167256393] [2022-02-23 22:45:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:14,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:14,579 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:14,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 22:45:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:14,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 22:45:14,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 122 proven. 23 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-02-23 22:45:14,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 32 proven. 23 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-02-23 22:45:15,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:15,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325312088] [2022-02-23 22:45:15,036 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:15,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167256393] [2022-02-23 22:45:15,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167256393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:15,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:15,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-02-23 22:45:15,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21119630] [2022-02-23 22:45:15,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:15,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 22:45:15,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 22:45:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-02-23 22:45:15,038 INFO L87 Difference]: Start difference. First operand 186 states and 256 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-02-23 22:45:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:15,318 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2022-02-23 22:45:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 22:45:15,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 107 [2022-02-23 22:45:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:15,319 INFO L225 Difference]: With dead ends: 245 [2022-02-23 22:45:15,319 INFO L226 Difference]: Without dead ends: 159 [2022-02-23 22:45:15,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2022-02-23 22:45:15,320 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 40 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:15,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 355 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-23 22:45:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-02-23 22:45:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 83 states have internal predecessors, (93), 61 states have call successors, (61), 14 states have call predecessors, (61), 13 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-02-23 22:45:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2022-02-23 22:45:15,342 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 107 [2022-02-23 22:45:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:15,343 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2022-02-23 22:45:15,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-02-23 22:45:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2022-02-23 22:45:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-23 22:45:15,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:15,344 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-02-23 22:45:15,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-23 22:45:15,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 22:45:15,559 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 2 times [2022-02-23 22:45:15,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:15,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225801333] [2022-02-23 22:45:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:15,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:15,567 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:15,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866813466] [2022-02-23 22:45:15,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:45:15,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:15,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:15,569 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:15,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 22:45:15,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:45:15,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:45:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 22:45:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 154 proven. 18 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-02-23 22:45:15,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 48 proven. 32 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2022-02-23 22:45:16,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:16,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225801333] [2022-02-23 22:45:16,091 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:16,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866813466] [2022-02-23 22:45:16,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866813466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:16,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:16,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-23 22:45:16,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385120503] [2022-02-23 22:45:16,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:16,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 22:45:16,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:16,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 22:45:16,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-23 22:45:16,092 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-02-23 22:45:16,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:16,362 INFO L93 Difference]: Finished difference Result 221 states and 305 transitions. [2022-02-23 22:45:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 22:45:16,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 127 [2022-02-23 22:45:16,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:16,364 INFO L225 Difference]: With dead ends: 221 [2022-02-23 22:45:16,364 INFO L226 Difference]: Without dead ends: 167 [2022-02-23 22:45:16,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-02-23 22:45:16,365 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 28 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:16,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 441 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-23 22:45:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 142. [2022-02-23 22:45:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 76 states have internal predecessors, (82), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-23 22:45:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2022-02-23 22:45:16,386 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 127 [2022-02-23 22:45:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:16,386 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2022-02-23 22:45:16,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-02-23 22:45:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2022-02-23 22:45:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-23 22:45:16,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:16,388 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1] [2022-02-23 22:45:16,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:16,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 22:45:16,592 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:16,593 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 2 times [2022-02-23 22:45:16,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:16,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566107463] [2022-02-23 22:45:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:16,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:16,600 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:16,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131677697] [2022-02-23 22:45:16,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:45:16,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:16,604 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:16,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 22:45:16,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:45:16,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:45:16,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 96 conjunts are in the unsatisfiable core [2022-02-23 22:45:16,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 119 proven. 151 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-02-23 22:45:17,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2022-02-23 22:45:18,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:18,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566107463] [2022-02-23 22:45:18,508 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:18,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131677697] [2022-02-23 22:45:18,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131677697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:18,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:18,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 28 [2022-02-23 22:45:18,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542949847] [2022-02-23 22:45:18,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:18,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-23 22:45:18,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-23 22:45:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-02-23 22:45:18,509 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 28 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 21 states have internal predecessors, (49), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-02-23 22:45:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:20,338 INFO L93 Difference]: Finished difference Result 204 states and 264 transitions. [2022-02-23 22:45:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-23 22:45:20,338 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 21 states have internal predecessors, (49), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 138 [2022-02-23 22:45:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:20,339 INFO L225 Difference]: With dead ends: 204 [2022-02-23 22:45:20,339 INFO L226 Difference]: Without dead ends: 159 [2022-02-23 22:45:20,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2022-02-23 22:45:20,340 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 81 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:20,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 481 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-23 22:45:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-23 22:45:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2022-02-23 22:45:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-23 22:45:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 186 transitions. [2022-02-23 22:45:20,361 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 186 transitions. Word has length 138 [2022-02-23 22:45:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:20,362 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 186 transitions. [2022-02-23 22:45:20,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 21 states have internal predecessors, (49), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-02-23 22:45:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 186 transitions. [2022-02-23 22:45:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-23 22:45:20,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:20,363 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 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] [2022-02-23 22:45:20,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:20,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:20,576 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1469599656, now seen corresponding path program 3 times [2022-02-23 22:45:20,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:20,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462155801] [2022-02-23 22:45:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:20,587 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:20,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154194040] [2022-02-23 22:45:20,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:45:20,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:20,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:20,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:20,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 22:45:20,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 22:45:20,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:45:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 52 conjunts are in the unsatisfiable core [2022-02-23 22:45:20,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 118 proven. 59 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2022-02-23 22:45:21,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:21,652 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:45:21,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:21,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462155801] [2022-02-23 22:45:21,769 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:21,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154194040] [2022-02-23 22:45:21,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154194040] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:45:21,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:45:21,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-02-23 22:45:21,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604335217] [2022-02-23 22:45:21,769 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:21,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 22:45:21,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 22:45:21,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-02-23 22:45:21,770 INFO L87 Difference]: Start difference. First operand 146 states and 186 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 22:45:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:22,016 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2022-02-23 22:45:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 22:45:22,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 146 [2022-02-23 22:45:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:22,018 INFO L225 Difference]: With dead ends: 182 [2022-02-23 22:45:22,018 INFO L226 Difference]: Without dead ends: 180 [2022-02-23 22:45:22,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-23 22:45:22,019 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:22,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 215 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:45:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-23 22:45:22,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-02-23 22:45:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 96 states have (on average 1.0625) internal successors, (102), 96 states have internal predecessors, (102), 64 states have call successors, (64), 19 states have call predecessors, (64), 18 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-02-23 22:45:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 229 transitions. [2022-02-23 22:45:22,047 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 229 transitions. Word has length 146 [2022-02-23 22:45:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:22,047 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 229 transitions. [2022-02-23 22:45:22,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 22:45:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 229 transitions. [2022-02-23 22:45:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-02-23 22:45:22,048 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:22,048 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 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] [2022-02-23 22:45:22,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-23 22:45:22,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 22:45:22,264 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:22,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:22,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1402624196, now seen corresponding path program 4 times [2022-02-23 22:45:22,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:22,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646954993] [2022-02-23 22:45:22,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:22,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:22,270 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:22,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686265924] [2022-02-23 22:45:22,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 22:45:22,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:22,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:22,272 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:22,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 22:45:22,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 22:45:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:45:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 22:45:22,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2022-02-23 22:45:22,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 60 proven. 51 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-02-23 22:45:22,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:22,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646954993] [2022-02-23 22:45:22,858 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:22,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686265924] [2022-02-23 22:45:22,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686265924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:22,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:22,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-02-23 22:45:22,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001242145] [2022-02-23 22:45:22,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:22,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 22:45:22,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:22,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 22:45:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-23 22:45:22,859 INFO L87 Difference]: Start difference. First operand 179 states and 229 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 12 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-02-23 22:45:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:23,080 INFO L93 Difference]: Finished difference Result 214 states and 274 transitions. [2022-02-23 22:45:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:45:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 12 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) Word has length 151 [2022-02-23 22:45:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:23,081 INFO L225 Difference]: With dead ends: 214 [2022-02-23 22:45:23,081 INFO L226 Difference]: Without dead ends: 124 [2022-02-23 22:45:23,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-02-23 22:45:23,082 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 28 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:23,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 404 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-23 22:45:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-02-23 22:45:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-23 22:45:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2022-02-23 22:45:23,099 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 151 [2022-02-23 22:45:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:23,099 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2022-02-23 22:45:23,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 12 states have call successors, (46), 2 states have call predecessors, (46), 3 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-02-23 22:45:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2022-02-23 22:45:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-02-23 22:45:23,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:23,101 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:23,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:23,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 22:45:23,315 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:23,316 INFO L85 PathProgramCache]: Analyzing trace with hash 477503177, now seen corresponding path program 5 times [2022-02-23 22:45:23,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:23,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018823184] [2022-02-23 22:45:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:23,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:23,323 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:23,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719437318] [2022-02-23 22:45:23,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 22:45:23,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:23,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:23,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:23,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 22:45:23,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-02-23 22:45:23,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:45:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 22:45:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 234 proven. 68 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2022-02-23 22:45:23,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 84 proven. 62 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-02-23 22:45:24,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:24,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018823184] [2022-02-23 22:45:24,077 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:24,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719437318] [2022-02-23 22:45:24,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719437318] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:24,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:24,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2022-02-23 22:45:24,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107539668] [2022-02-23 22:45:24,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:24,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 22:45:24,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 22:45:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-23 22:45:24,078 INFO L87 Difference]: Start difference. First operand 124 states and 151 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) [2022-02-23 22:45:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:24,417 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2022-02-23 22:45:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:45:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) Word has length 171 [2022-02-23 22:45:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:24,418 INFO L225 Difference]: With dead ends: 128 [2022-02-23 22:45:24,418 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 22:45:24,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-02-23 22:45:24,419 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 29 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:24,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 591 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:45:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 22:45:24,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 22:45:24,420 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) [2022-02-23 22:45:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 22:45:24,420 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 171 [2022-02-23 22:45:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:24,420 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 22:45:24,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) [2022-02-23 22:45:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 22:45:24,420 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 22:45:24,422 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 22:45:24,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:24,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 22:45:24,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 22:45:41,205 WARN L232 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 112 DAG size of output: 71 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-23 22:45:47,027 WARN L232 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 122 DAG size of output: 71 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-02-23 22:45:47,030 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-23 22:45:47,030 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 22:45:47,030 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 22:45:47,030 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 22:45:47,030 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-02-23 22:45:47,030 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 22:45:47,030 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 22:45:47,030 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-02-23 22:45:47,030 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-02-23 22:45:47,030 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-02-23 22:45:47,030 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-02-23 22:45:47,030 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 18 74) the Hoare annotation is: true [2022-02-23 22:45:47,030 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-02-23 22:45:47,030 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-02-23 22:45:47,030 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-02-23 22:45:47,030 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 2) (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-02-23 22:45:47,031 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 2) (<= main_~x~0 2)) [2022-02-23 22:45:47,031 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-02-23 22:45:47,031 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (and (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~a~0) (<= 0 main_~c~0) (= main_~b~0 main_~y~0) (<= (+ main_~c~0 main_~b~0) 2) (= main_~yy~0 (* main_~y~0 main_~y~0)) (= main_~q~0 0) (< main_~c~0 main_~b~0) (= main_~xy~0 (* main_~y~0 main_~x~0)) (= main_~a~0 main_~x~0) (<= main_~x~0 2) (= main_~p~0 1)) [2022-02-23 22:45:47,031 INFO L854 garLoopResultBuilder]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse5 (<= main_~b~0 main_~c~0)) (.cse0 (< main_~b~0 main_~a~0)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~y~0 2)) (.cse8 (* main_~b~0 2)) (.cse6 (<= 1 main_~y~0)) (.cse7 (* main_~y~0 main_~s~0)) (.cse3 (= main_~s~0 1)) (.cse4 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse10 (<= 0 main_~c~0)) (.cse9 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse11 (<= main_~x~0 2))) (or (and .cse0 (= (+ (* main_~x~0 2) main_~b~0) main_~y~0) .cse1 .cse2 .cse3 .cse4 (< main_~x~0 main_~y~0) (= (+ main_~q~0 2) 0) .cse5 .cse6) (and (= main_~p~0 0) (= main_~r~0 1) (= (+ main_~x~0 .cse7) main_~b~0) (= main_~a~0 main_~y~0) (< main_~c~0 .cse8) (= main_~b~0 main_~x~0) .cse5 (< main_~x~0 main_~a~0) (<= main_~a~0 2) (= main_~q~0 1) .cse9) (and .cse0 (< (* main_~c~0 2) 2) .cse1 .cse2 (< .cse8 2) .cse4 .cse10 (<= 0 main_~b~0) .cse6 (= (+ (* main_~q~0 main_~x~0) .cse7) 0) .cse11) (and .cse3 .cse4 (<= 1 main_~a~0) .cse10 (= main_~b~0 main_~y~0) (<= (+ main_~c~0 main_~b~0) 2) (= main_~yy~0 (* main_~y~0 main_~y~0)) (= main_~q~0 0) (< main_~c~0 main_~b~0) .cse9 (= main_~a~0 main_~x~0) .cse11 (= main_~p~0 1)))) [2022-02-23 22:45:47,031 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (and (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~a~0) (<= 0 main_~c~0) (= main_~b~0 main_~y~0) (<= (+ main_~c~0 main_~b~0) 2) (= main_~yy~0 (* main_~y~0 main_~y~0)) (= main_~q~0 0) (< main_~c~0 main_~b~0) (= main_~xy~0 (* main_~y~0 main_~x~0)) (= main_~a~0 main_~x~0) (<= main_~x~0 2) (= main_~p~0 1)) [2022-02-23 22:45:47,031 INFO L854 garLoopResultBuilder]: At program point L41-2(lines 41 68) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~y~0 2) (= main_~b~0 0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~y~0) (= (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)) 0)) [2022-02-23 22:45:47,031 INFO L858 garLoopResultBuilder]: For program point L42(lines 42 43) no Hoare annotation was computed. [2022-02-23 22:45:47,031 INFO L854 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 main_~x~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (or (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (= main_~b~0 0)) (<= 1 main_~y~0)) [2022-02-23 22:45:47,031 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse21 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse11 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse14 (* main_~y~0 main_~s~0)) (.cse12 (<= 1 main_~x~0)) (.cse13 (= main_~r~0 1)) (.cse15 (= main_~a~0 main_~y~0)) (.cse16 (< main_~x~0 main_~a~0)) (.cse17 (<= 1 main_~b~0)) (.cse18 (= main_~q~0 1)) (.cse19 (< main_~b~0 2)) (.cse2 (<= 1 main_~a~0)) (.cse20 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 .cse21)) (.cse22 (<= 0 main_~c~0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse5 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~x~0 2)) (.cse10 (= main_~p~0 1))) (or (and (<= main_~y~0 2) (= main_~k~0 0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~c~0 main_~x~0) .cse9 .cse10) (and .cse11 (<= 1 main_~c~0) .cse12 .cse1 .cse13 (= (+ main_~x~0 .cse14) main_~b~0) .cse15 (<= main_~c~0 2) .cse16 (<= main_~a~0 2) .cse17 .cse18 .cse19 .cse7) (and .cse11 (= main_~b~0 (+ (* main_~q~0 main_~x~0) .cse14)) .cse12 .cse1 .cse13 .cse15 .cse16 (= main_~k~0 2) .cse20 .cse17 .cse18 .cse19 .cse7) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse21) .cse0 .cse1 .cse2 .cse22 .cse3 .cse4 .cse20 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 .cse22 .cse3 (= main_~k~0 1) .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse9 .cse10)))) [2022-02-23 22:45:47,031 INFO L858 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2022-02-23 22:45:47,031 INFO L858 garLoopResultBuilder]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2022-02-23 22:45:47,031 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse21 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse11 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse14 (* main_~y~0 main_~s~0)) (.cse12 (<= 1 main_~x~0)) (.cse13 (= main_~r~0 1)) (.cse15 (= main_~a~0 main_~y~0)) (.cse16 (< main_~x~0 main_~a~0)) (.cse17 (<= 1 main_~b~0)) (.cse18 (= main_~q~0 1)) (.cse19 (< main_~b~0 2)) (.cse2 (<= 1 main_~a~0)) (.cse20 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 .cse21)) (.cse22 (<= 0 main_~c~0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse5 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~x~0 2)) (.cse10 (= main_~p~0 1))) (or (and (<= main_~y~0 2) (= main_~k~0 0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~c~0 main_~x~0) .cse9 .cse10) (and .cse11 (<= 1 main_~c~0) .cse12 .cse1 .cse13 (= (+ main_~x~0 .cse14) main_~b~0) .cse15 (<= main_~c~0 2) .cse16 (<= main_~a~0 2) .cse17 .cse18 .cse19 .cse7) (and .cse11 (= main_~b~0 (+ (* main_~q~0 main_~x~0) .cse14)) .cse12 .cse1 .cse13 .cse15 .cse16 (= main_~k~0 2) .cse20 .cse17 .cse18 .cse19 .cse7) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse21) .cse0 .cse1 .cse2 .cse22 .cse3 .cse4 .cse20 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 .cse22 .cse3 (= main_~k~0 1) .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse9 .cse10)))) [2022-02-23 22:45:47,031 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 18 74) no Hoare annotation was computed. [2022-02-23 22:45:47,031 INFO L854 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse21 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse11 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse14 (* main_~y~0 main_~s~0)) (.cse12 (<= 1 main_~x~0)) (.cse13 (= main_~r~0 1)) (.cse15 (= main_~a~0 main_~y~0)) (.cse16 (< main_~x~0 main_~a~0)) (.cse17 (<= 1 main_~b~0)) (.cse18 (= main_~q~0 1)) (.cse19 (< main_~b~0 2)) (.cse2 (<= 1 main_~a~0)) (.cse20 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 .cse21)) (.cse22 (<= 0 main_~c~0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse5 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~x~0 2)) (.cse10 (= main_~p~0 1))) (or (and (<= main_~y~0 2) (= main_~k~0 0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~c~0 main_~x~0) .cse9 .cse10) (and .cse11 (<= 1 main_~c~0) .cse12 .cse1 .cse13 (= (+ main_~x~0 .cse14) main_~b~0) .cse15 (<= main_~c~0 2) .cse16 (<= main_~a~0 2) .cse17 .cse18 .cse19 .cse7) (and .cse11 (= main_~b~0 (+ (* main_~q~0 main_~x~0) .cse14)) .cse12 .cse1 .cse13 .cse15 .cse16 (= main_~k~0 2) .cse20 .cse17 .cse18 .cse19 .cse7) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse21) .cse0 .cse1 .cse2 .cse22 .cse3 .cse4 .cse20 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 .cse22 .cse3 (= main_~k~0 1) .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse9 .cse10)))) [2022-02-23 22:45:47,032 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 18 74) no Hoare annotation was computed. [2022-02-23 22:45:47,032 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse21 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse11 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse14 (* main_~y~0 main_~s~0)) (.cse12 (<= 1 main_~x~0)) (.cse13 (= main_~r~0 1)) (.cse15 (= main_~a~0 main_~y~0)) (.cse16 (< main_~x~0 main_~a~0)) (.cse17 (<= 1 main_~b~0)) (.cse18 (= main_~q~0 1)) (.cse19 (< main_~b~0 2)) (.cse2 (<= 1 main_~a~0)) (.cse20 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 .cse21)) (.cse22 (<= 0 main_~c~0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse5 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~x~0 2)) (.cse10 (= main_~p~0 1))) (or (and (<= main_~y~0 2) (= main_~k~0 0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~c~0 main_~x~0) .cse9 .cse10) (and .cse11 (<= 1 main_~c~0) .cse12 .cse1 .cse13 (= (+ main_~x~0 .cse14) main_~b~0) .cse15 (<= main_~c~0 2) .cse16 (<= main_~a~0 2) .cse17 .cse18 .cse19 .cse7) (and .cse11 (= main_~b~0 (+ (* main_~q~0 main_~x~0) .cse14)) .cse12 .cse1 .cse13 .cse15 .cse16 (= main_~k~0 2) .cse20 .cse17 .cse18 .cse19 .cse7) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse21) .cse0 .cse1 .cse2 .cse22 .cse3 .cse4 .cse20 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 .cse22 .cse3 (= main_~k~0 1) .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse9 .cse10)))) [2022-02-23 22:45:47,032 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse21 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse11 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse12 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0)))) (.cse13 (<= 1 main_~x~0)) (.cse14 (= main_~r~0 1)) (.cse15 (= main_~a~0 main_~y~0)) (.cse16 (< main_~x~0 main_~a~0)) (.cse17 (<= 1 main_~b~0)) (.cse18 (= main_~q~0 1)) (.cse19 (< main_~b~0 2)) (.cse2 (<= 1 main_~a~0)) (.cse20 (<= (+ main_~c~0 (* main_~b~0 2)) 2)) (.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 .cse21)) (.cse22 (<= 0 main_~c~0)) (.cse3 (= main_~b~0 main_~y~0)) (.cse4 (= main_~yy~0 (* main_~y~0 main_~y~0))) (.cse5 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (= main_~xy~0 (* main_~y~0 main_~x~0))) (.cse8 (= main_~a~0 main_~x~0)) (.cse9 (<= main_~x~0 2)) (.cse10 (= main_~p~0 1))) (or (and (<= main_~y~0 2) (= main_~k~0 0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~c~0 main_~x~0) .cse9 .cse10) (and .cse11 (<= 1 main_~c~0) .cse12 .cse13 .cse1 .cse14 .cse15 (<= main_~c~0 2) .cse16 (<= main_~a~0 2) .cse17 .cse18 .cse19 .cse7) (and .cse11 .cse12 .cse13 .cse1 .cse14 .cse15 .cse16 (= main_~k~0 2) .cse20 .cse17 .cse18 .cse19 .cse7) (and (= (+ (* main_~k~0 main_~y~0 main_~s~0) (* main_~q~0 main_~k~0 main_~x~0)) .cse21) .cse0 .cse1 .cse2 .cse22 .cse3 .cse4 .cse20 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 .cse22 .cse3 (= main_~k~0 1) .cse4 .cse5 .cse6 .cse7 .cse8 (= main_~x~0 (+ main_~c~0 main_~y~0)) .cse9 .cse10)))) [2022-02-23 22:45:47,032 INFO L858 garLoopResultBuilder]: For program point L51(lines 47 56) no Hoare annotation was computed. [2022-02-23 22:45:47,032 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-02-23 22:45:47,032 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-02-23 22:45:47,032 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-02-23 22:45:47,032 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-02-23 22:45:47,032 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-02-23 22:45:47,032 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-02-23 22:45:47,034 INFO L732 BasicCegarLoop]: Path program histogram: [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:47,035 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 22:45:47,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:45:47 BasicIcfg [2022-02-23 22:45:47,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 22:45:47,059 INFO L158 Benchmark]: Toolchain (without parser) took 46060.78ms. Allocated memory was 186.6MB in the beginning and 306.2MB in the end (delta: 119.5MB). Free memory was 130.4MB in the beginning and 236.4MB in the end (delta: -106.0MB). Peak memory consumption was 156.7MB. Max. memory is 8.0GB. [2022-02-23 22:45:47,059 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory is still 146.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 22:45:47,060 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.49ms. Allocated memory was 186.6MB in the beginning and 254.8MB in the end (delta: 68.2MB). Free memory was 130.2MB in the beginning and 223.4MB in the end (delta: -93.3MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. [2022-02-23 22:45:47,060 INFO L158 Benchmark]: Boogie Preprocessor took 26.67ms. Allocated memory is still 254.8MB. Free memory was 223.4MB in the beginning and 221.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 22:45:47,060 INFO L158 Benchmark]: RCFGBuilder took 270.23ms. Allocated memory is still 254.8MB. Free memory was 221.9MB in the beginning and 210.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 22:45:47,060 INFO L158 Benchmark]: IcfgTransformer took 38.37ms. Allocated memory is still 254.8MB. Free memory was 210.4MB in the beginning and 208.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 22:45:47,060 INFO L158 Benchmark]: TraceAbstraction took 45492.70ms. Allocated memory was 254.8MB in the beginning and 306.2MB in the end (delta: 51.4MB). Free memory was 208.3MB in the beginning and 236.4MB in the end (delta: -28.1MB). Peak memory consumption was 166.9MB. Max. memory is 8.0GB. [2022-02-23 22:45:47,061 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 186.6MB. Free memory is still 146.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 227.49ms. Allocated memory was 186.6MB in the beginning and 254.8MB in the end (delta: 68.2MB). Free memory was 130.2MB in the beginning and 223.4MB in the end (delta: -93.3MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.67ms. Allocated memory is still 254.8MB. Free memory was 223.4MB in the beginning and 221.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 270.23ms. Allocated memory is still 254.8MB. Free memory was 221.9MB in the beginning and 210.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 38.37ms. Allocated memory is still 254.8MB. Free memory was 210.4MB in the beginning and 208.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 45492.70ms. Allocated memory was 254.8MB in the beginning and 306.2MB in the end (delta: 51.4MB). Free memory was 208.3MB in the beginning and 236.4MB in the end (delta: -28.1MB). Peak memory consumption was 166.9MB. 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: 13]: 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, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 45.4s, OverallIterations: 18, TraceHistogramMax: 23, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 22.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 606 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 509 mSDsluCounter, 5308 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4447 mSDsCounter, 856 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3723 IncrementalHoareTripleChecker+Invalid, 4580 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 856 mSolverCounterUnsat, 861 mSDtfsCounter, 3723 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2854 GetRequests, 2538 SyntacticMatches, 19 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=241occurred in iteration=11, InterpolantAutomatonStates: 203, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 123 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 20 LocationsWithAnnotation, 228 PreInvPairs, 284 NumberOfFragments, 1890 HoareAnnotationTreeSize, 228 FomulaSimplifications, 2113 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 20 FomulaSimplificationsInter, 7875 FormulaSimplificationTreeSizeReductionInter, 22.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 1642 NumberOfCodeBlocks, 1520 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 2686 ConstructedInterpolants, 0 QuantifiedInterpolants, 9120 SizeOfPredicates, 113 NumberOfNonLiveVariables, 3743 ConjunctsInSsa, 435 ConjunctsInUnsatCore, 29 InterpolantComputations, 4 PerfectInterpolantSequences, 8794/9490 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: 39]: Loop Invariant Derived loop invariant: (((((((((((b < a && x * 2 + b == y) && 1 <= x) && y <= 2) && s == 1) && a == y * r + p * x) && x < y) && q + 2 == 0) && b <= c) && 1 <= y) || ((((((((((p == 0 && r == 1) && x + y * s == b) && a == y) && c < b * 2) && b == x) && b <= c) && x < a) && a <= 2) && q == 1) && xy == y * x)) || ((((((((((b < a && c * 2 < 2) && 1 <= x) && y <= 2) && b * 2 < 2) && a == y * r + p * x) && 0 <= c) && 0 <= b) && 1 <= y) && q * x + y * s == 0) && x <= 2)) || ((((((((((((s == 1 && a == y * r + p * x) && 1 <= a) && 0 <= c) && b == y) && c + b <= 2) && yy == y * y) && q == 0) && c < b) && xy == y * x) && a == x) && x <= 2) && p == 1) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: ((((((((((((((((y <= 2 && k == 0) && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && yy == y * y) && q == 0) && 1 <= y) && xy == y * x) && a == x) && c == x) && x <= 2) && p == 1) || (((((((((((((a == c + b * k && 1 <= c) && 1 <= x) && a == y * r + p * x) && r == 1) && x + y * s == b) && a == y) && c <= 2) && x < a) && a <= 2) && 1 <= b) && q == 1) && b < 2) && xy == y * x)) || ((((((((((((a == c + b * k && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && r == 1) && a == y) && x < a) && k == 2) && c + b * 2 <= 2) && 1 <= b) && q == 1) && b < 2) && xy == y * x)) || (((((((((((((k * y * s + q * k * x == y * r + p * x && s == 1) && a == y * r + p * x) && 1 <= a) && 0 <= c) && b == y) && yy == y * y) && c + b * 2 <= 2) && q == 0) && 1 <= y) && xy == y * x) && a == x) && x <= 2) && p == 1)) || ((((((((((((s == 1 && a == y * r + p * x) && 0 <= c) && b == y) && k == 1) && yy == y * y) && q == 0) && 1 <= y) && xy == y * x) && a == x) && x == c + y) && x <= 2) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-02-23 22:45:47,085 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...