/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/loop-new/count_by_nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:47:40,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:47:40,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:47:40,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:47:40,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:47:40,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:47:40,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:47:40,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:47:40,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:47:40,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:47:40,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:47:40,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:47:40,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:47:40,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:47:40,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:47:40,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:47:40,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:47:40,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:47:40,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:47:40,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:47:40,561 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:47:40,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:47:40,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:47:40,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:47:40,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:47:40,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 19:47:40,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:47:40,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:47:40,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:47:40,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:47:40,589 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:47:40,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:47:40,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:47:40,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:47:40,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:47:40,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:47:40,591 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:47:40,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:47:40,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:47:40,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:47:40,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:47:40,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:47:40,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:47:40,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:47:40,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:47:40,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:47:40,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:47:40,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:47:40,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:47:40,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:47:40,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:47:40,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:47:40,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:47:40,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:47:40,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:47:40,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:47:40,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:47:40,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:47:40,594 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:47:40,594 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:47:40,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:47:40,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:47:40,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:47:40,753 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:47:40,754 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:47:40,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-03-17 19:47:40,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c125ec9a/b30731c689eb4bee9083e300ae4701f7/FLAGb33a14881 [2022-03-17 19:47:41,153 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:47:41,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-03-17 19:47:41,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c125ec9a/b30731c689eb4bee9083e300ae4701f7/FLAGb33a14881 [2022-03-17 19:47:41,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c125ec9a/b30731c689eb4bee9083e300ae4701f7 [2022-03-17 19:47:41,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:47:41,168 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:47:41,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:47:41,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:47:41,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:47:41,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5235f0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41, skipping insertion in model container [2022-03-17 19:47:41,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:47:41,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:47:41,341 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i[891,904] [2022-03-17 19:47:41,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:47:41,352 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:47:41,359 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i[891,904] [2022-03-17 19:47:41,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:47:41,371 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:47:41,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41 WrapperNode [2022-03-17 19:47:41,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:47:41,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:47:41,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:47:41,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:47:41,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:47:41,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:47:41,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:47:41,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:47:41,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:47:41,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:47:41,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 19:47:41,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 19:47:41,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:47:41,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:47:41,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:47:41,432 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 19:47:41,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:47:41,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:47:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:47:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:47:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 19:47:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 19:47:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:47:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:47:41,432 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 19:47:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:47:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 19:47:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:47:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:47:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:47:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:47:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:47:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:47:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:47:41,474 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:47:41,475 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:47:41,548 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:47:41,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:47:41,552 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 19:47:41,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:47:41 BoogieIcfgContainer [2022-03-17 19:47:41,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:47:41,556 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:47:41,556 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:47:41,557 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:47:41,559 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:47:41" (1/1) ... [2022-03-17 19:47:41,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:47:41 BasicIcfg [2022-03-17 19:47:41,571 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:47:41,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:47:41,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:47:41,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:47:41,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:47:41" (1/4) ... [2022-03-17 19:47:41,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e506f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:47:41, skipping insertion in model container [2022-03-17 19:47:41,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:47:41" (2/4) ... [2022-03-17 19:47:41,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e506f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:47:41, skipping insertion in model container [2022-03-17 19:47:41,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:47:41" (3/4) ... [2022-03-17 19:47:41,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e506f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:47:41, skipping insertion in model container [2022-03-17 19:47:41,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:47:41" (4/4) ... [2022-03-17 19:47:41,576 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.iqvasr [2022-03-17 19:47:41,579 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:47:41,579 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:47:41,611 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:47:41,616 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 19:47:41,616 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:47:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:47:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 19:47:41,630 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:47:41,630 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:47:41,631 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:47:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:47:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash 180216049, now seen corresponding path program 1 times [2022-03-17 19:47:41,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:47:41,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716249850] [2022-03-17 19:47:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:47:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:47:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:41,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:47:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:41,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:47:41,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716249850] [2022-03-17 19:47:41,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716249850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:47:41,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:47:41,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 19:47:41,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221985337] [2022-03-17 19:47:41,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:47:41,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 19:47:41,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:47:41,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 19:47:41,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 19:47:41,847 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-17 19:47:41,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:47:41,916 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-03-17 19:47:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 19:47:41,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-17 19:47:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:47:41,921 INFO L225 Difference]: With dead ends: 36 [2022-03-17 19:47:41,921 INFO L226 Difference]: Without dead ends: 15 [2022-03-17 19:47:41,924 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:47:41,928 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:47:41,929 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:47:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-17 19:47:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-17 19:47:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2022-03-17 19:47:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-17 19:47:41,956 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-03-17 19:47:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:47:41,957 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-17 19:47:41,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-17 19:47:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-17 19:47:41,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 19:47:41,959 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:47:41,959 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:47:41,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:47:41,960 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:47:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:47:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1966995474, now seen corresponding path program 1 times [2022-03-17 19:47:41,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:47:41,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727616103] [2022-03-17 19:47:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:47:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:47:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:42,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:47:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:42,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:47:42,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727616103] [2022-03-17 19:47:42,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727616103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:47:42,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085270089] [2022-03-17 19:47:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:47:42,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:42,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:47:42,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:47:42,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:47:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 19:47:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:47:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:42,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:47:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:42,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085270089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:47:42,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:47:42,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-03-17 19:47:42,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57202798] [2022-03-17 19:47:42,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:47:42,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 19:47:42,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:47:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 19:47:42,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 19:47:42,208 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:47:42,259 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-03-17 19:47:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 19:47:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-17 19:47:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:47:42,260 INFO L225 Difference]: With dead ends: 21 [2022-03-17 19:47:42,260 INFO L226 Difference]: Without dead ends: 16 [2022-03-17 19:47:42,260 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 19:47:42,261 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:47:42,261 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:47:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-17 19:47:42,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-17 19:47:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-03-17 19:47:42,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-03-17 19:47:42,264 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2022-03-17 19:47:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:47:42,265 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-03-17 19:47:42,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-03-17 19:47:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-17 19:47:42,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:47:42,265 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:47:42,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 19:47:42,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:42,475 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:47:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:47:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 442000299, now seen corresponding path program 2 times [2022-03-17 19:47:42,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:47:42,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115024407] [2022-03-17 19:47:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:47:42,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:47:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:47:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:42,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:47:42,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115024407] [2022-03-17 19:47:42,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115024407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:47:42,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134474862] [2022-03-17 19:47:42,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:47:42,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:42,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:47:42,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:47:42,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:47:42,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:47:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:47:42,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 19:47:42,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:47:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:42,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:47:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:42,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134474862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:47:42,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:47:42,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-17 19:47:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937783866] [2022-03-17 19:47:42,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:47:42,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 19:47:42,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:47:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 19:47:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-17 19:47:42,760 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:47:42,886 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-03-17 19:47:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 19:47:42,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-17 19:47:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:47:42,888 INFO L225 Difference]: With dead ends: 33 [2022-03-17 19:47:42,888 INFO L226 Difference]: Without dead ends: 25 [2022-03-17 19:47:42,889 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-03-17 19:47:42,892 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:47:42,893 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 43 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:47:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-17 19:47:42,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-17 19:47:42,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-03-17 19:47:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-03-17 19:47:42,897 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 15 [2022-03-17 19:47:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:47:42,897 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-03-17 19:47:42,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-03-17 19:47:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 19:47:42,898 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:47:42,898 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:47:42,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:47:43,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 19:47:43,112 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:47:43,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:47:43,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1322263071, now seen corresponding path program 3 times [2022-03-17 19:47:43,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:47:43,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590652585] [2022-03-17 19:47:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:47:43,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:47:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:43,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:47:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:43,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:47:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590652585] [2022-03-17 19:47:43,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590652585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:47:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842255813] [2022-03-17 19:47:43,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:47:43,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:47:43,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:47:43,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:47:43,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-17 19:47:43,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:47:43,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 19:47:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:47:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:43,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:47:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:43,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842255813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:47:43,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:47:43,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-17 19:47:43,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353228058] [2022-03-17 19:47:43,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:47:43,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 19:47:43,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:47:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 19:47:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-03-17 19:47:43,522 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:47:43,775 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-03-17 19:47:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 19:47:43,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-17 19:47:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:47:43,777 INFO L225 Difference]: With dead ends: 53 [2022-03-17 19:47:43,777 INFO L226 Difference]: Without dead ends: 41 [2022-03-17 19:47:43,777 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=400, Invalid=1006, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 19:47:43,778 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:47:43,778 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 48 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:47:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-17 19:47:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-03-17 19:47:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 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) [2022-03-17 19:47:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-03-17 19:47:43,785 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 23 [2022-03-17 19:47:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:47:43,785 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-03-17 19:47:43,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-03-17 19:47:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 19:47:43,786 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:47:43,786 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:47:43,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 19:47:43,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:43,987 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:47:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:47:43,988 INFO L85 PathProgramCache]: Analyzing trace with hash 467698439, now seen corresponding path program 4 times [2022-03-17 19:47:43,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:47:43,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348795350] [2022-03-17 19:47:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:47:43,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:47:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:44,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:47:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:44,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:47:44,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348795350] [2022-03-17 19:47:44,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348795350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:47:44,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120063368] [2022-03-17 19:47:44,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 19:47:44,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:44,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:47:44,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:47:44,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 19:47:44,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 19:47:44,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:47:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 19:47:44,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:47:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:44,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:47:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:44,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120063368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:47:44,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:47:44,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-17 19:47:44,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367540077] [2022-03-17 19:47:44,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:47:44,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-17 19:47:44,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:47:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-17 19:47:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2022-03-17 19:47:44,759 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:47:45,293 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2022-03-17 19:47:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-17 19:47:45,295 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-17 19:47:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:47:45,296 INFO L225 Difference]: With dead ends: 93 [2022-03-17 19:47:45,296 INFO L226 Difference]: Without dead ends: 73 [2022-03-17 19:47:45,298 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1544, Invalid=3286, Unknown=0, NotChecked=0, Total=4830 [2022-03-17 19:47:45,298 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:47:45,298 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 48 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:47:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-17 19:47:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-03-17 19:47:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 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) [2022-03-17 19:47:45,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-03-17 19:47:45,304 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 39 [2022-03-17 19:47:45,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:47:45,304 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-03-17 19:47:45,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 35 states have internal predecessors, (71), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-03-17 19:47:45,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-17 19:47:45,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:47:45,306 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:47:45,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 19:47:45,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:45,519 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:47:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:47:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash 355783895, now seen corresponding path program 5 times [2022-03-17 19:47:45,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:47:45,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125932906] [2022-03-17 19:47:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:47:45,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:47:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:45,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:47:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:45,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:47:45,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125932906] [2022-03-17 19:47:45,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125932906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:47:45,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785119984] [2022-03-17 19:47:45,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 19:47:45,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:45,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:47:45,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:47:45,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 19:47:46,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-03-17 19:47:46,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:47:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-17 19:47:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:47:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:46,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:47:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:47,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785119984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:47:47,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:47:47,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-17 19:47:47,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131425868] [2022-03-17 19:47:47,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:47:47,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-17 19:47:47,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:47:47,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-17 19:47:47,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2092, Invalid=2738, Unknown=0, NotChecked=0, Total=4830 [2022-03-17 19:47:47,295 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:47:48,902 INFO L93 Difference]: Finished difference Result 173 states and 204 transitions. [2022-03-17 19:47:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-17 19:47:48,902 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-17 19:47:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:47:48,903 INFO L225 Difference]: With dead ends: 173 [2022-03-17 19:47:48,903 INFO L226 Difference]: Without dead ends: 137 [2022-03-17 19:47:48,907 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6136, Invalid=11686, Unknown=0, NotChecked=0, Total=17822 [2022-03-17 19:47:48,908 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 278 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 19:47:48,908 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 63 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 19:47:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-17 19:47:48,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-03-17 19:47:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 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) [2022-03-17 19:47:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-03-17 19:47:48,916 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 71 [2022-03-17 19:47:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:47:48,916 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-03-17 19:47:48,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 67 states have internal predecessors, (135), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-03-17 19:47:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-17 19:47:48,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:47:48,919 INFO L500 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:47:48,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-17 19:47:49,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:49,132 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:47:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:47:49,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1512814711, now seen corresponding path program 6 times [2022-03-17 19:47:49,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:47:49,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374255106] [2022-03-17 19:47:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:47:49,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:47:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:50,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:47:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:47:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:50,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:47:50,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374255106] [2022-03-17 19:47:50,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374255106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:47:50,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783288693] [2022-03-17 19:47:50,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 19:47:50,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:47:50,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:47:50,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 19:47:50,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2022-03-17 19:47:50,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:47:50,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-17 19:47:50,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:47:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:50,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:47:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:47:54,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783288693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:47:54,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:47:54,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-17 19:47:54,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549516452] [2022-03-17 19:47:54,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:47:54,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-03-17 19:47:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:47:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-03-17 19:47:54,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8268, Invalid=9554, Unknown=0, NotChecked=0, Total=17822 [2022-03-17 19:47:54,465 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:47:59,673 INFO L93 Difference]: Finished difference Result 333 states and 396 transitions. [2022-03-17 19:47:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-17 19:47:59,673 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-03-17 19:47:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:47:59,674 INFO L225 Difference]: With dead ends: 333 [2022-03-17 19:47:59,675 INFO L226 Difference]: Without dead ends: 265 [2022-03-17 19:47:59,681 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11275 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=24536, Invalid=43846, Unknown=0, NotChecked=0, Total=68382 [2022-03-17 19:47:59,681 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 518 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 19:47:59,682 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 78 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 19:47:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-17 19:47:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2022-03-17 19:47:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0038610038610039) internal successors, (260), 259 states have internal predecessors, (260), 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) [2022-03-17 19:47:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 264 transitions. [2022-03-17 19:47:59,701 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 264 transitions. Word has length 135 [2022-03-17 19:47:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:47:59,701 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 264 transitions. [2022-03-17 19:47:59,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.962686567164179) internal successors, (263), 131 states have internal predecessors, (263), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:47:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 264 transitions. [2022-03-17 19:47:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-17 19:47:59,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:47:59,704 INFO L500 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:47:59,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 19:47:59,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:47:59,912 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:47:59,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:47:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash -648904777, now seen corresponding path program 7 times [2022-03-17 19:47:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:47:59,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356282562] [2022-03-17 19:47:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:47:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:48:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:48:04,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:48:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:48:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:48:04,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:48:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356282562] [2022-03-17 19:48:04,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356282562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:48:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842001867] [2022-03-17 19:48:04,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 19:48:04,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:48:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:48:04,759 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:48:04,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 19:48:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:48:04,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 130 conjunts are in the unsatisfiable core [2022-03-17 19:48:04,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:48:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:48:05,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:48:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:48:18,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842001867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:48:18,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:48:18,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 131, 131] total 262 [2022-03-17 19:48:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587144248] [2022-03-17 19:48:18,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:48:18,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 262 states [2022-03-17 19:48:18,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:48:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 262 interpolants. [2022-03-17 19:48:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32908, Invalid=35474, Unknown=0, NotChecked=0, Total=68382 [2022-03-17 19:48:18,842 INFO L87 Difference]: Start difference. First operand 264 states and 264 transitions. Second operand has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:48:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:48:38,676 INFO L93 Difference]: Finished difference Result 653 states and 780 transitions. [2022-03-17 19:48:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2022-03-17 19:48:38,680 INFO L78 Accepts]: Start accepts. Automaton has has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-03-17 19:48:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:48:38,682 INFO L225 Difference]: With dead ends: 653 [2022-03-17 19:48:38,682 INFO L226 Difference]: Without dead ends: 521 [2022-03-17 19:48:38,696 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43051 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=98200, Invalid=169606, Unknown=0, NotChecked=0, Total=267806 [2022-03-17 19:48:38,697 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 1341 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 19:48:38,697 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1341 Valid, 68 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 19:48:38,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-17 19:48:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 520. [2022-03-17 19:48:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 515 states have (on average 1.0019417475728156) internal successors, (516), 515 states have internal predecessors, (516), 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) [2022-03-17 19:48:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 520 transitions. [2022-03-17 19:48:38,714 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 520 transitions. Word has length 263 [2022-03-17 19:48:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:48:38,714 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 520 transitions. [2022-03-17 19:48:38,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 262 states, 262 states have (on average 1.9809160305343512) internal successors, (519), 259 states have internal predecessors, (519), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:48:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 520 transitions. [2022-03-17 19:48:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-03-17 19:48:38,735 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:48:38,735 INFO L500 BasicCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:48:38,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 19:48:38,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:48:38,944 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:48:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:48:38,944 INFO L85 PathProgramCache]: Analyzing trace with hash 209980983, now seen corresponding path program 8 times [2022-03-17 19:48:38,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:48:38,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249856665] [2022-03-17 19:48:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:48:38,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:48:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:48:57,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:48:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:48:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:48:57,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:48:57,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249856665] [2022-03-17 19:48:57,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249856665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:48:57,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309649113] [2022-03-17 19:48:57,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:48:57,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:48:57,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:48:57,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:48:57,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 19:48:57,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:48:57,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:48:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 258 conjunts are in the unsatisfiable core [2022-03-17 19:48:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:48:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:48:58,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:49:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:49:50,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309649113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:49:50,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:49:50,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [260, 259, 259] total 518 [2022-03-17 19:49:50,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988166993] [2022-03-17 19:49:50,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:49:50,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 518 states [2022-03-17 19:49:50,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:49:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 518 interpolants. [2022-03-17 19:49:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131340, Invalid=136466, Unknown=0, NotChecked=0, Total=267806 [2022-03-17 19:49:50,039 INFO L87 Difference]: Start difference. First operand 520 states and 520 transitions. Second operand has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:51:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:51:16,121 INFO L93 Difference]: Finished difference Result 1293 states and 1548 transitions. [2022-03-17 19:51:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 515 states. [2022-03-17 19:51:16,132 INFO L78 Accepts]: Start accepts. Automaton has has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 519 [2022-03-17 19:51:16,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:51:16,135 INFO L225 Difference]: With dead ends: 1293 [2022-03-17 19:51:16,136 INFO L226 Difference]: Without dead ends: 1033 [2022-03-17 19:51:16,195 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1810 GetRequests, 781 SyntacticMatches, 1 SemanticMatches, 1028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168043 ImplicationChecksByTransitivity, 138.1s TimeCoverageRelationStatistics Valid=392984, Invalid=666886, Unknown=0, NotChecked=0, Total=1059870 [2022-03-17 19:51:16,195 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 2337 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 1286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2337 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1286 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-17 19:51:16,195 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2337 Valid, 58 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1286 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-17 19:51:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-03-17 19:51:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1032. [2022-03-17 19:51:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1027 states have (on average 1.0009737098344693) internal successors, (1028), 1027 states have internal predecessors, (1028), 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) [2022-03-17 19:51:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1032 transitions. [2022-03-17 19:51:16,216 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1032 transitions. Word has length 519 [2022-03-17 19:51:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:51:16,217 INFO L478 AbstractCegarLoop]: Abstraction has 1032 states and 1032 transitions. [2022-03-17 19:51:16,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 518 states, 518 states have (on average 1.9903474903474903) internal successors, (1031), 515 states have internal predecessors, (1031), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:51:16,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1032 transitions. [2022-03-17 19:51:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2022-03-17 19:51:16,233 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:51:16,233 INFO L500 BasicCegarLoop]: trace histogram [510, 510, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:51:16,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 19:51:16,446 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,SelfDestructingSolverStorable8 [2022-03-17 19:51:16,446 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:51:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:51:16,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1182214967, now seen corresponding path program 9 times [2022-03-17 19:51:16,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:51:16,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74672847] [2022-03-17 19:51:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:51:16,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:51:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:52:29,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:52:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:52:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:52:29,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:52:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74672847] [2022-03-17 19:52:29,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74672847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:52:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150958163] [2022-03-17 19:52:29,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:52:29,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:52:29,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:52:29,249 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:52:29,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 19:52:33,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2022-03-17 19:52:33,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:52:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 5659 conjuncts, 514 conjunts are in the unsatisfiable core [2022-03-17 19:52:33,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:52:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:52:35,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:56:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:56:08,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150958163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:56:08,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:56:08,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [516, 515, 515] total 1030 [2022-03-17 19:56:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790661836] [2022-03-17 19:56:08,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:56:08,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1030 states [2022-03-17 19:56:08,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:56:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1030 interpolants. [2022-03-17 19:56:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524812, Invalid=535058, Unknown=0, NotChecked=0, Total=1059870 [2022-03-17 19:56:08,235 INFO L87 Difference]: Start difference. First operand 1032 states and 1032 transitions. Second operand has 1030 states, 1030 states have (on average 1.9951456310679612) internal successors, (2055), 1027 states have internal predecessors, (2055), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)