/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/divbin2_unwindbound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 07:07:05,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 07:07:05,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 07:07:05,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 07:07:05,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 07:07:05,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 07:07:05,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 07:07:05,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 07:07:05,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 07:07:05,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 07:07:05,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 07:07:05,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 07:07:05,389 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 07:07:05,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 07:07:05,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 07:07:05,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 07:07:05,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 07:07:05,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 07:07:05,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 07:07:05,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 07:07:05,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 07:07:05,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 07:07:05,435 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 07:07:05,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 07:07:05,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 07:07:05,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 07:07:05,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 07:07:05,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 07:07:05,437 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 07:07:05,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 07:07:05,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 07:07:05,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 07:07:05,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 07:07:05,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 07:07:05,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 07:07:05,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 07:07:05,438 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 07:07:05,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 07:07:05,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:07:05,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 07:07:05,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 07:07:05,441 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 07:07:05,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 07:07:05,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 07:07:05,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 07:07:05,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 07:07:05,708 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 07:07:05,709 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 07:07:05,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2022-04-05 07:07:05,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c98dd1b/afcdab6e58304e95b9e02ddcd61a1639/FLAGbf17e5158 [2022-04-05 07:07:06,124 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 07:07:06,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound5.i [2022-04-05 07:07:06,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c98dd1b/afcdab6e58304e95b9e02ddcd61a1639/FLAGbf17e5158 [2022-04-05 07:07:06,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c98dd1b/afcdab6e58304e95b9e02ddcd61a1639 [2022-04-05 07:07:06,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 07:07:06,146 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 07:07:06,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 07:07:06,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 07:07:06,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 07:07:06,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@964f6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06, skipping insertion in model container [2022-04-05 07:07:06,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 07:07:06,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 07:07:06,344 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/divbin2_unwindbound5.i[951,964] [2022-04-05 07:07:06,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:07:06,379 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 07:07:06,399 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/divbin2_unwindbound5.i[951,964] [2022-04-05 07:07:06,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:07:06,420 INFO L208 MainTranslator]: Completed translation [2022-04-05 07:07:06,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06 WrapperNode [2022-04-05 07:07:06,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 07:07:06,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 07:07:06,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 07:07:06,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 07:07:06,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 07:07:06,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 07:07:06,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 07:07:06,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 07:07:06,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:07:06,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:07:06,482 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) [2022-04-05 07:07:06,483 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 [2022-04-05 07:07:06,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 07:07:06,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 07:07:06,517 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 07:07:06,517 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 07:07:06,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 07:07:06,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 07:07:06,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 07:07:06,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 07:07:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 07:07:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 07:07:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 07:07:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 07:07:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 07:07:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 07:07:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 07:07:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 07:07:06,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 07:07:06,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 07:07:06,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 07:07:06,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 07:07:06,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 07:07:06,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 07:07:06,572 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 07:07:06,573 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 07:07:06,672 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 07:07:06,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 07:07:06,676 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 07:07:06,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:07:06 BoogieIcfgContainer [2022-04-05 07:07:06,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 07:07:06,678 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 07:07:06,678 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 07:07:06,679 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 07:07:06,681 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:07:06" (1/1) ... [2022-04-05 07:07:06,682 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 07:07:06,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:07:06 BasicIcfg [2022-04-05 07:07:06,693 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 07:07:06,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 07:07:06,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 07:07:06,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 07:07:06,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 07:07:06" (1/4) ... [2022-04-05 07:07:06,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f692ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:07:06, skipping insertion in model container [2022-04-05 07:07:06,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:07:06" (2/4) ... [2022-04-05 07:07:06,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f692ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:07:06, skipping insertion in model container [2022-04-05 07:07:06,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:07:06" (3/4) ... [2022-04-05 07:07:06,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f692ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:07:06, skipping insertion in model container [2022-04-05 07:07:06,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:07:06" (4/4) ... [2022-04-05 07:07:06,724 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.iqvasr [2022-04-05 07:07:06,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 07:07:06,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 07:07:06,776 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 07:07:06,783 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 07:07:06,784 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 07:07:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 07:07:06,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 07:07:06,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:06,801 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:06,802 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:06,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2022-04-05 07:07:06,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:06,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726800679] [2022-04-05 07:07:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:06,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:06,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:07:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:06,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:07:06,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726800679] [2022-04-05 07:07:06,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726800679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:07:06,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:07:06,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 07:07:06,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245929459] [2022-04-05 07:07:06,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:07:06,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 07:07:06,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:07:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 07:07:06,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:07:07,000 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:07:07,057 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-04-05 07:07:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 07:07:07,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 07:07:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:07:07,066 INFO L225 Difference]: With dead ends: 44 [2022-04-05 07:07:07,066 INFO L226 Difference]: Without dead ends: 22 [2022-04-05 07:07:07,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:07:07,071 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:07:07,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:07:07,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-05 07:07:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-05 07:07:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 07:07:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-04-05 07:07:07,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-04-05 07:07:07,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:07:07,102 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-04-05 07:07:07,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-04-05 07:07:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 07:07:07,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:07,104 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:07,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 07:07:07,105 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:07,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:07,107 INFO L85 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2022-04-05 07:07:07,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:07,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116586046] [2022-04-05 07:07:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:07,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:07,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:07:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:07,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:07:07,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116586046] [2022-04-05 07:07:07,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116586046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:07:07,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:07:07,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 07:07:07,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333385473] [2022-04-05 07:07:07,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:07:07,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:07:07,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:07:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:07:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:07:07,221 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:07:07,292 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-04-05 07:07:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:07:07,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-05 07:07:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:07:07,293 INFO L225 Difference]: With dead ends: 35 [2022-04-05 07:07:07,293 INFO L226 Difference]: Without dead ends: 23 [2022-04-05 07:07:07,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:07:07,294 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:07:07,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:07:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-05 07:07:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-05 07:07:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 07:07:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-04-05 07:07:07,299 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2022-04-05 07:07:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:07:07,299 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-04-05 07:07:07,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-05 07:07:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 07:07:07,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:07,300 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:07,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 07:07:07,300 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2022-04-05 07:07:07,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:07,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525179681] [2022-04-05 07:07:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:07,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:07,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:07:07,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379098893] [2022-04-05 07:07:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:07:07,336 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) [2022-04-05 07:07:07,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 07:07:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:07,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:07:07,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:07:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:07,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:07:07,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:07:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525179681] [2022-04-05 07:07:07,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:07:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379098893] [2022-04-05 07:07:07,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379098893] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:07:07,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:07:07,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:07:07,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339885555] [2022-04-05 07:07:07,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:07:07,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:07:07,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:07:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:07:07,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:07:07,498 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:07:07,526 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-05 07:07:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:07:07,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-05 07:07:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:07:07,528 INFO L225 Difference]: With dead ends: 34 [2022-04-05 07:07:07,528 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 07:07:07,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:07:07,529 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:07:07,530 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 66 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:07:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 07:07:07,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-05 07:07:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 07:07:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-04-05 07:07:07,533 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-04-05 07:07:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:07:07,534 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-04-05 07:07:07,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-04-05 07:07:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 07:07:07,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:07,534 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:07,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 07:07:07,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:07,735 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2022-04-05 07:07:07,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:07,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418666834] [2022-04-05 07:07:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:07,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:07,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:07:07,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100393534] [2022-04-05 07:07:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:07,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:07:07,745 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) [2022-04-05 07:07:07,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 07:07:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:07,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 07:07:07,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:07:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:07,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:07:07,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:07:07,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418666834] [2022-04-05 07:07:07,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:07:07,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100393534] [2022-04-05 07:07:07,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100393534] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:07:07,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:07:07,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:07:07,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613588005] [2022-04-05 07:07:07,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:07:07,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:07:07,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:07:07,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:07:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:07:07,941 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:07,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:07:07,999 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-04-05 07:07:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:07:08,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-05 07:07:08,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:07:08,000 INFO L225 Difference]: With dead ends: 35 [2022-04-05 07:07:08,001 INFO L226 Difference]: Without dead ends: 32 [2022-04-05 07:07:08,001 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-05 07:07:08,001 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:07:08,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 75 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:07:08,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-05 07:07:08,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-05 07:07:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 07:07:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-04-05 07:07:08,006 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-04-05 07:07:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:07:08,006 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-04-05 07:07:08,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:08,006 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-05 07:07:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 07:07:08,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:08,007 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:08,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 07:07:08,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-05 07:07:08,221 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:08,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:08,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2022-04-05 07:07:08,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:08,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4626709] [2022-04-05 07:07:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:08,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:08,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:07:08,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688171591] [2022-04-05 07:07:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:07:08,230 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) [2022-04-05 07:07:08,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 07:07:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:08,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:07:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:07:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:08,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:07:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:08,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:07:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4626709] [2022-04-05 07:07:08,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:07:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688171591] [2022-04-05 07:07:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688171591] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:07:08,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:07:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 07:07:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243476144] [2022-04-05 07:07:08,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:07:08,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 07:07:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:07:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 07:07:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:07:08,351 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:07:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:07:08,399 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-04-05 07:07:08,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 07:07:08,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 07:07:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:07:08,400 INFO L225 Difference]: With dead ends: 66 [2022-04-05 07:07:08,400 INFO L226 Difference]: Without dead ends: 54 [2022-04-05 07:07:08,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:07:08,401 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:07:08,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 125 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:07:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-05 07:07:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2022-04-05 07:07:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 07:07:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-04-05 07:07:08,407 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 17 [2022-04-05 07:07:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:07:08,407 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-04-05 07:07:08,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:07:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-04-05 07:07:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 07:07:08,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:08,408 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:08,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 07:07:08,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:08,624 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2022-04-05 07:07:08,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649437994] [2022-04-05 07:07:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:08,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:08,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:07:08,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626880160] [2022-04-05 07:07:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:08,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:08,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:07:08,634 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) [2022-04-05 07:07:08,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 07:07:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:08,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:07:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:07:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:08,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:07:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:08,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:07:08,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649437994] [2022-04-05 07:07:08,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:07:08,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626880160] [2022-04-05 07:07:08,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626880160] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:07:08,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:07:08,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-05 07:07:08,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138544575] [2022-04-05 07:07:08,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:07:08,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:07:08,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:07:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:07:08,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:07:08,762 INFO L87 Difference]: Start difference. First operand 40 states and 48 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, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:07:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:07:08,825 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2022-04-05 07:07:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 07:07:08,826 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, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 07:07:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:07:08,826 INFO L225 Difference]: With dead ends: 76 [2022-04-05 07:07:08,827 INFO L226 Difference]: Without dead ends: 69 [2022-04-05 07:07:08,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-04-05 07:07:08,827 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:07:08,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 143 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:07:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-05 07:07:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2022-04-05 07:07:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.346938775510204) internal successors, (66), 52 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 07:07:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-04-05 07:07:08,833 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 18 [2022-04-05 07:07:08,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:07:08,833 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-04-05 07:07:08,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:07:08,834 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-04-05 07:07:08,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 07:07:08,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:08,834 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:08,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-05 07:07:09,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:09,053 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2052329254, now seen corresponding path program 1 times [2022-04-05 07:07:09,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:09,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229205406] [2022-04-05 07:07:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:09,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:09,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:07:09,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583794221] [2022-04-05 07:07:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:07:09,062 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) [2022-04-05 07:07:09,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 07:07:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:09,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 07:07:09,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:07:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:09,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:07:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:09,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:07:09,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229205406] [2022-04-05 07:07:09,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:07:09,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583794221] [2022-04-05 07:07:09,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583794221] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:07:09,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:07:09,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-04-05 07:07:09,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048954131] [2022-04-05 07:07:09,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:07:09,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:07:09,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:07:09,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:07:09,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:07:09,396 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:09,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:07:09,412 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-04-05 07:07:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:07:09,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-05 07:07:09,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:07:09,414 INFO L225 Difference]: With dead ends: 90 [2022-04-05 07:07:09,414 INFO L226 Difference]: Without dead ends: 88 [2022-04-05 07:07:09,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:07:09,415 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:07:09,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 98 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-04-05 07:07:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-05 07:07:09,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-04-05 07:07:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 72 states have internal predecessors, (84), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 07:07:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2022-04-05 07:07:09,424 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 18 [2022-04-05 07:07:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:07:09,424 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2022-04-05 07:07:09,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:07:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2022-04-05 07:07:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 07:07:09,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:09,425 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:09,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 07:07:09,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:09,643 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash 462666167, now seen corresponding path program 1 times [2022-04-05 07:07:09,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:09,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131608261] [2022-04-05 07:07:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:09,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:09,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:07:09,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677430110] [2022-04-05 07:07:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:09,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:09,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:07:09,652 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) [2022-04-05 07:07:09,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 07:07:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:09,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 07:07:09,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:07:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:09,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:07:09,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:07:09,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131608261] [2022-04-05 07:07:09,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:07:09,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677430110] [2022-04-05 07:07:09,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677430110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:07:09,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:07:09,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 07:07:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946051624] [2022-04-05 07:07:09,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:07:09,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 07:07:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:07:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 07:07:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:07:09,746 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 07:07:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:07:09,760 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2022-04-05 07:07:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 07:07:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-05 07:07:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:07:09,761 INFO L225 Difference]: With dead ends: 118 [2022-04-05 07:07:09,761 INFO L226 Difference]: Without dead ends: 73 [2022-04-05 07:07:09,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:07:09,762 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:07:09,763 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:07:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-05 07:07:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-05 07:07:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 60 states have internal predecessors, (71), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 07:07:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-04-05 07:07:09,770 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 24 [2022-04-05 07:07:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:07:09,771 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-04-05 07:07:09,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 07:07:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-04-05 07:07:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 07:07:09,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:09,771 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:09,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 07:07:09,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:09,980 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:09,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1651364104, now seen corresponding path program 1 times [2022-04-05 07:07:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:09,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735800461] [2022-04-05 07:07:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:09,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:09,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:07:09,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254599998] [2022-04-05 07:07:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:09,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:07:09,989 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) [2022-04-05 07:07:09,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 07:07:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:10,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 07:07:10,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:07:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 07:07:10,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:07:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 07:07:10,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:07:10,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735800461] [2022-04-05 07:07:10,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:07:10,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254599998] [2022-04-05 07:07:10,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254599998] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:07:10,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:07:10,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-05 07:07:10,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356886408] [2022-04-05 07:07:10,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:07:10,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:07:10,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:07:10,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:07:10,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:07:10,196 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:07:12,231 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 [] [2022-04-05 07:07:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:07:12,387 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-04-05 07:07:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 07:07:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-04-05 07:07:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:07:12,388 INFO L225 Difference]: With dead ends: 84 [2022-04-05 07:07:12,388 INFO L226 Difference]: Without dead ends: 69 [2022-04-05 07:07:12,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:07:12,389 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:07:12,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 118 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-05 07:07:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-05 07:07:12,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-04-05 07:07:12,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 57 states have internal predecessors, (66), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 07:07:12,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2022-04-05 07:07:12,395 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 24 [2022-04-05 07:07:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:07:12,395 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2022-04-05 07:07:12,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 07:07:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2022-04-05 07:07:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 07:07:12,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:07:12,396 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:07:12,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 07:07:12,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:12,597 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:07:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:07:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash -268589446, now seen corresponding path program 1 times [2022-04-05 07:07:12,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:07:12,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237812620] [2022-04-05 07:07:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:12,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:07:12,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:07:12,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672743146] [2022-04-05 07:07:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:07:12,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:07:12,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:07:12,606 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) [2022-04-05 07:07:12,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 07:07:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:07:12,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 07:07:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:07:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:07:12,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:07:27,564 WARN L232 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:07:47,427 WARN L232 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 7 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-05 07:08:06,468 WARN L232 SmtUtils]: Spent 12.67s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:08:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 07:08:25,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:08:25,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237812620] [2022-04-05 07:08:25,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:08:25,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672743146] [2022-04-05 07:08:25,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672743146] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:08:25,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:08:25,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-04-05 07:08:25,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224833544] [2022-04-05 07:08:25,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:08:25,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 07:08:25,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:08:25,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 07:08:25,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=107, Unknown=5, NotChecked=0, Total=156 [2022-04-05 07:08:25,640 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 07:09:01,377 WARN L232 SmtUtils]: Spent 24.44s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:09:03,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:05,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:07,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:09,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:12,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:14,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:16,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:18,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:20,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:22,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:25,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:27,352 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~b~0 4294967296)) (.cse0 (mod c_main_~A~0 4294967296)) (.cse2 (* c_main_~q~0 2))) (and (= .cse0 (mod (+ (* (div .cse1 2) .cse2) c_main_~r~0) 4294967296)) (let ((.cse4 (mod (* c_main_~b~0 2) 4294967296)) (.cse3 (mod c_main_~r~0 4294967296))) (or (not (<= .cse1 .cse3)) (= .cse0 (mod (+ (* (div .cse4 2) .cse2) c_main_~r~0) 4294967296)) (<= .cse4 .cse3))))) is different from true [2022-04-05 07:09:29,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:31,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:33,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 07:09:35,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:38,083 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:40,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:42,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:44,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:46,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:48,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:51,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:53,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:09:55,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:12,957 WARN L232 SmtUtils]: Spent 15.13s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 07:10:14,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:17,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:19,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:21,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:23,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:25,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:28,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:30,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 07:10:32,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 07:10:34,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:36,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:38,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:41,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:43,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:45,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:47,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:10:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:10:47,661 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2022-04-05 07:10:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 07:10:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-04-05 07:10:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:10:47,806 INFO L225 Difference]: With dead ends: 125 [2022-04-05 07:10:47,806 INFO L226 Difference]: Without dead ends: 100 [2022-04-05 07:10:47,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 84.8s TimeCoverageRelationStatistics Valid=70, Invalid=163, Unknown=11, NotChecked=28, Total=272 [2022-04-05 07:10:47,807 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 40 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 25 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 86.7s IncrementalHoareTripleChecker+Time [2022-04-05 07:10:47,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 167 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 103 Invalid, 40 Unknown, 4 Unchecked, 86.7s Time] [2022-04-05 07:10:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-05 07:10:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2022-04-05 07:10:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 07:10:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2022-04-05 07:10:47,819 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 27 [2022-04-05 07:10:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:10:47,819 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2022-04-05 07:10:47,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 07:10:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2022-04-05 07:10:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 07:10:47,823 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:10:47,824 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:10:47,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 07:10:48,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 07:10:48,026 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:10:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:10:48,027 INFO L85 PathProgramCache]: Analyzing trace with hash 331066096, now seen corresponding path program 2 times [2022-04-05 07:10:48,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:10:48,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785221019] [2022-04-05 07:10:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:10:48,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:10:48,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:10:48,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588698727] [2022-04-05 07:10:48,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:10:48,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:10:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:10:48,037 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) [2022-04-05 07:10:48,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 07:10:48,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-05 07:10:48,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:10:48,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:10:48,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:10:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-05 07:10:48,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:10:48,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:10:48,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785221019] [2022-04-05 07:10:48,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:10:48,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588698727] [2022-04-05 07:10:48,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588698727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:10:48,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:10:48,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:10:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786072093] [2022-04-05 07:10:48,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:10:48,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:10:48,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:10:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:10:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:10:48,198 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:10:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:10:48,264 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2022-04-05 07:10:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:10:48,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-05 07:10:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:10:48,265 INFO L225 Difference]: With dead ends: 98 [2022-04-05 07:10:48,265 INFO L226 Difference]: Without dead ends: 95 [2022-04-05 07:10:48,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:10:48,266 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:10:48,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:10:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-05 07:10:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2022-04-05 07:10:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.161764705882353) internal successors, (79), 72 states have internal predecessors, (79), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 07:10:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-04-05 07:10:48,277 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 26 [2022-04-05 07:10:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:10:48,278 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-04-05 07:10:48,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 07:10:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-04-05 07:10:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 07:10:48,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:10:48,279 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:10:48,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 07:10:48,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:10:48,504 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:10:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:10:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1111952806, now seen corresponding path program 2 times [2022-04-05 07:10:48,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:10:48,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645856469] [2022-04-05 07:10:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:10:48,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:10:48,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:10:48,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873081338] [2022-04-05 07:10:48,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:10:48,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:10:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:10:48,514 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) [2022-04-05 07:10:48,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process