/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 10:26:10,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 10:26:10,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 10:26:10,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 10:26:10,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 10:26:10,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 10:26:10,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 10:26:10,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 10:26:10,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 10:26:10,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 10:26:10,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 10:26:10,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 10:26:10,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 10:26:10,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 10:26:10,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 10:26:10,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 10:26:10,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 10:26:10,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 10:26:10,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 10:26:10,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 10:26:10,540 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 10:26:10,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 10:26:10,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 10:26:10,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 10:26:10,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 10:26:10,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 10:26:10,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 10:26:10,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 10:26:10,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 10:26:10,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 10:26:10,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 10:26:10,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 10:26:10,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 10:26:10,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 10:26:10,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 10:26:10,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 10:26:10,577 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 10:26:10,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 10:26:10,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 10:26:10,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 10:26:10,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 10:26:10,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 10:26:10,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 10:26:10,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 10:26:10,578 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 10:26:10,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 10:26:10,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 10:26:10,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 10:26:10,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 10:26:10,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:26:10,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 10:26:10,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 10:26:10,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 10:26:10,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 10:26:10,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 10:26:10,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 10:26:10,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 10:26:10,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 10:26:10,580 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 10:26:10,580 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 10:26:10,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 10:26:10,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 10:26:10,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 10:26:10,797 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 10:26:10,797 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 10:26:10,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-03-20 10:26:10,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b89c92e75/f1462909b9b144b8892ec9977d5add43/FLAG94db9a0f0 [2022-03-20 10:26:11,246 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 10:26:11,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2022-03-20 10:26:11,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b89c92e75/f1462909b9b144b8892ec9977d5add43/FLAG94db9a0f0 [2022-03-20 10:26:11,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b89c92e75/f1462909b9b144b8892ec9977d5add43 [2022-03-20 10:26:11,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 10:26:11,270 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 10:26:11,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 10:26:11,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 10:26:11,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 10:26:11,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a327b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11, skipping insertion in model container [2022-03-20 10:26:11,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 10:26:11,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 10:26:11,417 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2022-03-20 10:26:11,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:26:11,446 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 10:26:11,456 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2022-03-20 10:26:11,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 10:26:11,480 INFO L208 MainTranslator]: Completed translation [2022-03-20 10:26:11,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11 WrapperNode [2022-03-20 10:26:11,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 10:26:11,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 10:26:11,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 10:26:11,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 10:26:11,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 10:26:11,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 10:26:11,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 10:26:11,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 10:26:11,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 10:26:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:11,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 10:26:11,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 10:26:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 10:26:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 10:26:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 10:26:11,588 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 10:26:11,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 10:26:11,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 10:26:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 10:26:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 10:26:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 10:26:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 10:26:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 10:26:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 10:26:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 10:26:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 10:26:11,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 10:26:11,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 10:26:11,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 10:26:11,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 10:26:11,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 10:26:11,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 10:26:11,636 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 10:26:11,637 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 10:26:11,749 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 10:26:11,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 10:26:11,753 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 10:26:11,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:26:11 BoogieIcfgContainer [2022-03-20 10:26:11,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 10:26:11,755 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 10:26:11,755 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 10:26:11,756 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 10:26:11,758 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:26:11" (1/1) ... [2022-03-20 10:26:11,759 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 10:26:11,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:26:11 BasicIcfg [2022-03-20 10:26:11,770 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 10:26:11,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 10:26:11,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 10:26:11,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 10:26:11,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:26:11" (1/4) ... [2022-03-20 10:26:11,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5379c344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:26:11, skipping insertion in model container [2022-03-20 10:26:11,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:26:11" (2/4) ... [2022-03-20 10:26:11,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5379c344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:26:11, skipping insertion in model container [2022-03-20 10:26:11,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:26:11" (3/4) ... [2022-03-20 10:26:11,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5379c344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:26:11, skipping insertion in model container [2022-03-20 10:26:11,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 10:26:11" (4/4) ... [2022-03-20 10:26:11,775 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.cqvasr [2022-03-20 10:26:11,778 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 10:26:11,778 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 10:26:11,819 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 10:26:11,823 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 10:26:11,823 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 10:26:11,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:26:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 10:26:11,835 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:11,835 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:11,836 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:11,839 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2022-03-20 10:26:11,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:11,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354149163] [2022-03-20 10:26:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:11,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:11,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976560647] [2022-03-20 10:26:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:11,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:11,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:11,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:11,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 10:26:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-20 10:26:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 10:26:12,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:26:12,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354149163] [2022-03-20 10:26:12,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976560647] [2022-03-20 10:26:12,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976560647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:26:12,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:26:12,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 10:26:12,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395252831] [2022-03-20 10:26:12,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:12,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-20 10:26:12,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:12,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-20 10:26:12,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 10:26:12,054 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:26:12,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:12,067 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2022-03-20 10:26:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-20 10:26:12,068 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 10:26:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:12,072 INFO L225 Difference]: With dead ends: 67 [2022-03-20 10:26:12,072 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 10:26:12,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 10:26:12,076 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:12,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 10:26:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 10:26:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 10:26:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 10:26:12,099 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-03-20 10:26:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:12,099 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 10:26:12,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:26:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 10:26:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:26:12,100 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:12,100 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:12,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:12,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-20 10:26:12,316 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:12,317 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2022-03-20 10:26:12,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:12,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352116283] [2022-03-20 10:26:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:12,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:12,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915911183] [2022-03-20 10:26:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:12,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:12,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:12,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:12,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 10:26:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:12,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 10:26:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:12,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:26:12,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352116283] [2022-03-20 10:26:12,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915911183] [2022-03-20 10:26:12,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915911183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:26:12,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:26:12,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 10:26:12,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64072446] [2022-03-20 10:26:12,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:12,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 10:26:12,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:12,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 10:26:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:26:12,485 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:26:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:12,506 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-20 10:26:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:26:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 10:26:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:12,508 INFO L225 Difference]: With dead ends: 41 [2022-03-20 10:26:12,508 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 10:26:12,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:26:12,509 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:12,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 10:26:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 10:26:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 10:26:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-20 10:26:12,521 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-03-20 10:26:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:12,522 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-20 10:26:12,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 10:26:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-20 10:26:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 10:26:12,522 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:12,523 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:12,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:12,723 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,SelfDestructingSolverStorable1 [2022-03-20 10:26:12,725 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:12,726 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2022-03-20 10:26:12,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:12,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701863084] [2022-03-20 10:26:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:12,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:12,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:12,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68765444] [2022-03-20 10:26:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:12,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:12,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:12,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:12,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 10:26:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:12,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 10:26:12,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:22,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:26:22,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:22,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701863084] [2022-03-20 10:26:22,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:22,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68765444] [2022-03-20 10:26:22,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68765444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:26:22,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:26:22,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:26:22,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422027559] [2022-03-20 10:26:22,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:22,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:26:22,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:26:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:26:22,782 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:26:24,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:26:26,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 10:26:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:26,318 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-20 10:26:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:26:26,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 10:26:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:26,320 INFO L225 Difference]: With dead ends: 53 [2022-03-20 10:26:26,320 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 10:26:26,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:26:26,321 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:26,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 10:26:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 10:26:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 10:26:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 10:26:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-03-20 10:26:26,329 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-03-20 10:26:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:26,329 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-03-20 10:26:26,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 10:26:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-03-20 10:26:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 10:26:26,330 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:26,330 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:26,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:26,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:26,548 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:26,548 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2022-03-20 10:26:26,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:26,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72608162] [2022-03-20 10:26:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:26,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:26,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:26,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670527139] [2022-03-20 10:26:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:26,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:26,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:26,557 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:26,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 10:26:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 10:26:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:26,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:26,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:26,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72608162] [2022-03-20 10:26:26,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:26,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670527139] [2022-03-20 10:26:26,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670527139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:26,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:26,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 10:26:26,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945907625] [2022-03-20 10:26:26,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:26,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:26:26,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:26:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:26:26,783 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:26:26,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:26,862 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-03-20 10:26:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 10:26:26,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-03-20 10:26:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:26,863 INFO L225 Difference]: With dead ends: 57 [2022-03-20 10:26:26,863 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 10:26:26,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 10:26:26,864 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:26,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 111 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:26:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 10:26:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-03-20 10:26:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 10:26:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-20 10:26:26,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-03-20 10:26:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:26,870 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-20 10:26:26,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 10:26:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-20 10:26:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 10:26:26,871 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:26,871 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:26,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:27,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:27,087 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:27,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2022-03-20 10:26:27,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:27,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883639770] [2022-03-20 10:26:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:27,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:27,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:27,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821822151] [2022-03-20 10:26:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:27,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:27,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:27,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:27,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 10:26:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 10:26:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:27,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:26:27,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:27,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883639770] [2022-03-20 10:26:27,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:27,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821822151] [2022-03-20 10:26:27,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821822151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:26:27,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:26:27,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:26:27,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456065026] [2022-03-20 10:26:27,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:27,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:26:27,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:26:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:26:27,186 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 10:26:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:27,206 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-03-20 10:26:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:26:27,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-03-20 10:26:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:27,207 INFO L225 Difference]: With dead ends: 65 [2022-03-20 10:26:27,207 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 10:26:27,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:26:27,208 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:27,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 10:26:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 10:26:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 10:26:27,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-03-20 10:26:27,214 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-03-20 10:26:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:27,214 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-03-20 10:26:27,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 10:26:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-03-20 10:26:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 10:26:27,215 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:27,215 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:27,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:27,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:27,430 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2022-03-20 10:26:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:27,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056881047] [2022-03-20 10:26:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:27,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:27,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:27,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209440851] [2022-03-20 10:26:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:27,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:27,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:27,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:27,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 10:26:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:27,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:26:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:27,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 10:26:27,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056881047] [2022-03-20 10:26:27,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209440851] [2022-03-20 10:26:27,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209440851] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 10:26:27,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:26:27,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-03-20 10:26:27,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700485091] [2022-03-20 10:26:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:27,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:26:27,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:27,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:26:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:26:27,665 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 10:26:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:27,709 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-20 10:26:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:26:27,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-20 10:26:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:27,710 INFO L225 Difference]: With dead ends: 74 [2022-03-20 10:26:27,710 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 10:26:27,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:26:27,711 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:27,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 10:26:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-20 10:26:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 10:26:27,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-20 10:26:27,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-03-20 10:26:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:27,717 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-20 10:26:27,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 10:26:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-20 10:26:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 10:26:27,718 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:27,718 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:27,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 10:26:27,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:27,934 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:27,935 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2022-03-20 10:26:27,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:27,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987036593] [2022-03-20 10:26:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:27,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:27,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:27,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110128072] [2022-03-20 10:26:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:27,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:27,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:27,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:27,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 10:26:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:27,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 10:26:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:28,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 10:26:28,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:28,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987036593] [2022-03-20 10:26:28,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:28,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110128072] [2022-03-20 10:26:28,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110128072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:28,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:28,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 10:26:28,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540437454] [2022-03-20 10:26:28,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:28,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:26:28,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:28,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:26:28,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:26:28,135 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-20 10:26:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:28,240 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2022-03-20 10:26:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 10:26:28,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-03-20 10:26:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:28,242 INFO L225 Difference]: With dead ends: 129 [2022-03-20 10:26:28,242 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 10:26:28,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:26:28,243 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 88 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:28,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 180 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:26:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 10:26:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-03-20 10:26:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 10:26:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2022-03-20 10:26:28,275 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 43 [2022-03-20 10:26:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:28,275 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2022-03-20 10:26:28,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-20 10:26:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2022-03-20 10:26:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 10:26:28,276 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:28,276 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:28,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:28,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:28,492 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2022-03-20 10:26:28,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:28,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110757792] [2022-03-20 10:26:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:28,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:28,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231017177] [2022-03-20 10:26:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:28,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:28,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:28,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:28,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 10:26:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 10:26:28,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 10:26:28,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:26:28,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:28,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110757792] [2022-03-20 10:26:28,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:28,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231017177] [2022-03-20 10:26:28,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231017177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:26:28,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:26:28,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 10:26:28,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474719206] [2022-03-20 10:26:28,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:28,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 10:26:28,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:28,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 10:26:28,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:26:28,620 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:26:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:28,645 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-03-20 10:26:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:26:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-20 10:26:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:28,647 INFO L225 Difference]: With dead ends: 158 [2022-03-20 10:26:28,647 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 10:26:28,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:26:28,648 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 23 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 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 [2022-03-20 10:26:28,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:28,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 10:26:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-03-20 10:26:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 10:26:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-03-20 10:26:28,661 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-03-20 10:26:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:28,661 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-03-20 10:26:28,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 10:26:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-03-20 10:26:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 10:26:28,662 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:28,662 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:28,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:28,874 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,SelfDestructingSolverStorable7 [2022-03-20 10:26:28,874 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:28,875 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2022-03-20 10:26:28,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:28,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465259683] [2022-03-20 10:26:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:28,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:28,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:28,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237070243] [2022-03-20 10:26:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:28,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:28,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:28,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:28,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 10:26:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:28,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 10:26:28,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:29,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 10:26:29,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:29,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465259683] [2022-03-20 10:26:29,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:29,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237070243] [2022-03-20 10:26:29,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237070243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:29,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:29,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 10:26:29,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095708214] [2022-03-20 10:26:29,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:29,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 10:26:29,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 10:26:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 10:26:29,166 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-20 10:26:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:29,329 INFO L93 Difference]: Finished difference Result 219 states and 283 transitions. [2022-03-20 10:26:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 10:26:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-03-20 10:26:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:29,330 INFO L225 Difference]: With dead ends: 219 [2022-03-20 10:26:29,330 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 10:26:29,331 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-20 10:26:29,331 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 181 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:29,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 201 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:26:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 10:26:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-03-20 10:26:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 10:26:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-03-20 10:26:29,346 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-03-20 10:26:29,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:29,346 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-03-20 10:26:29,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-20 10:26:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-03-20 10:26:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 10:26:29,347 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:29,347 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:29,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:29,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:29,563 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:29,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:29,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2022-03-20 10:26:29,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:29,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199882094] [2022-03-20 10:26:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:29,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:29,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:29,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696890752] [2022-03-20 10:26:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:29,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:29,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:29,570 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:29,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 10:26:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 10:26:29,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:29,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 10:26:29,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:29,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199882094] [2022-03-20 10:26:29,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:29,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696890752] [2022-03-20 10:26:29,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696890752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:29,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:29,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 10:26:29,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875190558] [2022-03-20 10:26:29,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:29,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 10:26:29,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 10:26:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:26:29,848 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-20 10:26:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:30,052 INFO L93 Difference]: Finished difference Result 211 states and 278 transitions. [2022-03-20 10:26:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 10:26:30,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-03-20 10:26:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:30,053 INFO L225 Difference]: With dead ends: 211 [2022-03-20 10:26:30,053 INFO L226 Difference]: Without dead ends: 206 [2022-03-20 10:26:30,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-03-20 10:26:30,054 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 187 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:30,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 266 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 10:26:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-20 10:26:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-03-20 10:26:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 10:26:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-03-20 10:26:30,070 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-03-20 10:26:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:30,070 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-03-20 10:26:30,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-20 10:26:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-03-20 10:26:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 10:26:30,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:30,072 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:30,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:30,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 10:26:30,283 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:30,284 INFO L85 PathProgramCache]: Analyzing trace with hash -725338187, now seen corresponding path program 1 times [2022-03-20 10:26:30,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:30,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015381181] [2022-03-20 10:26:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:30,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:30,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:30,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748093426] [2022-03-20 10:26:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:30,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:30,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:30,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:30,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 10:26:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 10:26:30,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-20 10:26:30,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-20 10:26:30,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015381181] [2022-03-20 10:26:30,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748093426] [2022-03-20 10:26:30,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748093426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:30,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:30,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-03-20 10:26:30,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779418995] [2022-03-20 10:26:30,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:30,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 10:26:30,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:30,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 10:26:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:26:30,621 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 10:26:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:30,667 INFO L93 Difference]: Finished difference Result 502 states and 697 transitions. [2022-03-20 10:26:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:26:30,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-03-20 10:26:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:30,669 INFO L225 Difference]: With dead ends: 502 [2022-03-20 10:26:30,669 INFO L226 Difference]: Without dead ends: 359 [2022-03-20 10:26:30,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:26:30,670 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:30,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 163 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:30,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-20 10:26:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-03-20 10:26:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 10:26:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-03-20 10:26:30,698 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-03-20 10:26:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:30,698 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-03-20 10:26:30,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 10:26:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-03-20 10:26:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 10:26:30,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:30,700 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:30,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:30,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 10:26:30,907 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1986043633, now seen corresponding path program 2 times [2022-03-20 10:26:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:30,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644964297] [2022-03-20 10:26:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:30,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:30,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919325850] [2022-03-20 10:26:30,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:26:30,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:30,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:30,932 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:30,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 10:26:30,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:26:30,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:30,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 10:26:30,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 10:26:31,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-20 10:26:31,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:31,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644964297] [2022-03-20 10:26:31,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:31,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919325850] [2022-03-20 10:26:31,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919325850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:31,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:31,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 10:26:31,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267765892] [2022-03-20 10:26:31,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:31,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 10:26:31,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:31,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 10:26:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 10:26:31,374 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-03-20 10:26:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:31,811 INFO L93 Difference]: Finished difference Result 985 states and 1423 transitions. [2022-03-20 10:26:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 10:26:31,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) Word has length 91 [2022-03-20 10:26:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:31,815 INFO L225 Difference]: With dead ends: 985 [2022-03-20 10:26:31,815 INFO L226 Difference]: Without dead ends: 842 [2022-03-20 10:26:31,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 10:26:31,816 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 369 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:31,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 447 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 10:26:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-20 10:26:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 793. [2022-03-20 10:26:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 597 states have (on average 1.2680067001675042) internal successors, (757), 606 states have internal predecessors, (757), 177 states have call successors, (177), 20 states have call predecessors, (177), 18 states have return successors, (175), 166 states have call predecessors, (175), 175 states have call successors, (175) [2022-03-20 10:26:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1109 transitions. [2022-03-20 10:26:31,923 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1109 transitions. Word has length 91 [2022-03-20 10:26:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:31,923 INFO L478 AbstractCegarLoop]: Abstraction has 793 states and 1109 transitions. [2022-03-20 10:26:31,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-03-20 10:26:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1109 transitions. [2022-03-20 10:26:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 10:26:31,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:31,927 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:31,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:32,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 10:26:32,131 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 1 times [2022-03-20 10:26:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:32,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002212373] [2022-03-20 10:26:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:32,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:32,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:32,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236604223] [2022-03-20 10:26:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:32,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:32,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:32,139 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:32,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 10:26:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:32,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 10:26:32,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:32,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 10:26:32,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:32,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002212373] [2022-03-20 10:26:32,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:32,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236604223] [2022-03-20 10:26:32,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236604223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:32,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:32,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 10:26:32,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513703132] [2022-03-20 10:26:32,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:32,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 10:26:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:32,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 10:26:32,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 10:26:32,610 INFO L87 Difference]: Start difference. First operand 793 states and 1109 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-03-20 10:26:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:33,122 INFO L93 Difference]: Finished difference Result 1285 states and 1799 transitions. [2022-03-20 10:26:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 10:26:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 97 [2022-03-20 10:26:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:33,126 INFO L225 Difference]: With dead ends: 1285 [2022-03-20 10:26:33,126 INFO L226 Difference]: Without dead ends: 795 [2022-03-20 10:26:33,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 10:26:33,127 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 479 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:33,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 530 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 10:26:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-03-20 10:26:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 740. [2022-03-20 10:26:33,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 557 states have internal predecessors, (675), 164 states have call successors, (164), 24 states have call predecessors, (164), 22 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-03-20 10:26:33,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1001 transitions. [2022-03-20 10:26:33,202 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1001 transitions. Word has length 97 [2022-03-20 10:26:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:33,203 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 1001 transitions. [2022-03-20 10:26:33,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-03-20 10:26:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1001 transitions. [2022-03-20 10:26:33,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 10:26:33,204 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:33,204 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:33,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:33,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 10:26:33,422 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:33,422 INFO L85 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 1 times [2022-03-20 10:26:33,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:33,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106341120] [2022-03-20 10:26:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:33,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:33,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356725725] [2022-03-20 10:26:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:33,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:33,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:33,430 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:33,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 10:26:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 10:26:33,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:33,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 10:26:33,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:33,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106341120] [2022-03-20 10:26:33,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356725725] [2022-03-20 10:26:33,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356725725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:33,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:33,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 10:26:33,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838941749] [2022-03-20 10:26:33,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:33,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 10:26:33,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 10:26:33,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 10:26:33,956 INFO L87 Difference]: Start difference. First operand 740 states and 1001 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-20 10:26:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:34,564 INFO L93 Difference]: Finished difference Result 850 states and 1161 transitions. [2022-03-20 10:26:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 10:26:34,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 103 [2022-03-20 10:26:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:34,567 INFO L225 Difference]: With dead ends: 850 [2022-03-20 10:26:34,567 INFO L226 Difference]: Without dead ends: 845 [2022-03-20 10:26:34,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 10:26:34,568 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 656 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:34,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 523 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 10:26:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-03-20 10:26:34,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 830. [2022-03-20 10:26:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 621 states have (on average 1.1996779388083736) internal successors, (745), 627 states have internal predecessors, (745), 184 states have call successors, (184), 26 states have call predecessors, (184), 24 states have return successors, (182), 176 states have call predecessors, (182), 182 states have call successors, (182) [2022-03-20 10:26:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1111 transitions. [2022-03-20 10:26:34,621 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1111 transitions. Word has length 103 [2022-03-20 10:26:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:34,621 INFO L478 AbstractCegarLoop]: Abstraction has 830 states and 1111 transitions. [2022-03-20 10:26:34,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-20 10:26:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1111 transitions. [2022-03-20 10:26:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 10:26:34,624 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:34,624 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:34,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:34,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:34,840 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:34,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash -872608014, now seen corresponding path program 3 times [2022-03-20 10:26:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:34,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450560991] [2022-03-20 10:26:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:34,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:34,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:34,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939519267] [2022-03-20 10:26:34,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 10:26:34,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:34,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:34,854 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:34,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 10:26:34,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 10:26:34,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:34,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 10:26:34,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-03-20 10:26:35,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:26:35,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450560991] [2022-03-20 10:26:35,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939519267] [2022-03-20 10:26:35,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939519267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:26:35,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:26:35,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 10:26:35,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269943999] [2022-03-20 10:26:35,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:35,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 10:26:35,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 10:26:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:26:35,127 INFO L87 Difference]: Start difference. First operand 830 states and 1111 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 10:26:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:35,202 INFO L93 Difference]: Finished difference Result 1103 states and 1482 transitions. [2022-03-20 10:26:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 10:26:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 181 [2022-03-20 10:26:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:35,206 INFO L225 Difference]: With dead ends: 1103 [2022-03-20 10:26:35,206 INFO L226 Difference]: Without dead ends: 896 [2022-03-20 10:26:35,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 10:26:35,208 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:35,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:35,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-03-20 10:26:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 861. [2022-03-20 10:26:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 645 states have (on average 1.1767441860465115) internal successors, (759), 652 states have internal predecessors, (759), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 177 states have call predecessors, (184), 184 states have call successors, (184) [2022-03-20 10:26:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1129 transitions. [2022-03-20 10:26:35,285 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1129 transitions. Word has length 181 [2022-03-20 10:26:35,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:35,286 INFO L478 AbstractCegarLoop]: Abstraction has 861 states and 1129 transitions. [2022-03-20 10:26:35,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 10:26:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1129 transitions. [2022-03-20 10:26:35,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 10:26:35,288 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:35,288 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:35,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:35,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 10:26:35,504 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 121372368, now seen corresponding path program 4 times [2022-03-20 10:26:35,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:35,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81071266] [2022-03-20 10:26:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:35,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:35,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:35,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739611668] [2022-03-20 10:26:35,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 10:26:35,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:35,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:35,514 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:35,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 10:26:35,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 10:26:35,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:35,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2022-03-20 10:26:35,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 604 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-03-20 10:26:35,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:26:35,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:35,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81071266] [2022-03-20 10:26:35,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:35,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739611668] [2022-03-20 10:26:35,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739611668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:26:35,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:26:35,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 10:26:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709097339] [2022-03-20 10:26:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:35,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 10:26:35,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 10:26:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:26:35,813 INFO L87 Difference]: Start difference. First operand 861 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-20 10:26:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:35,898 INFO L93 Difference]: Finished difference Result 1462 states and 1917 transitions. [2022-03-20 10:26:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 10:26:35,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 187 [2022-03-20 10:26:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:35,901 INFO L225 Difference]: With dead ends: 1462 [2022-03-20 10:26:35,901 INFO L226 Difference]: Without dead ends: 919 [2022-03-20 10:26:35,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 10:26:35,902 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:35,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 86 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-03-20 10:26:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 867. [2022-03-20 10:26:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 651 states have (on average 1.1751152073732718) internal successors, (765), 660 states have internal predecessors, (765), 186 states have call successors, (186), 31 states have call predecessors, (186), 29 states have return successors, (184), 175 states have call predecessors, (184), 184 states have call successors, (184) [2022-03-20 10:26:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1135 transitions. [2022-03-20 10:26:35,957 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1135 transitions. Word has length 187 [2022-03-20 10:26:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:35,958 INFO L478 AbstractCegarLoop]: Abstraction has 867 states and 1135 transitions. [2022-03-20 10:26:35,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-20 10:26:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1135 transitions. [2022-03-20 10:26:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 10:26:35,960 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:35,960 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:35,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:36,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 10:26:36,192 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash 230455855, now seen corresponding path program 5 times [2022-03-20 10:26:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:36,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071876229] [2022-03-20 10:26:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:36,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:36,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90245150] [2022-03-20 10:26:36,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 10:26:36,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:36,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:36,202 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:36,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 10:26:36,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-20 10:26:36,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:36,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 10:26:36,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2022-03-20 10:26:36,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:26:36,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:36,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071876229] [2022-03-20 10:26:36,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:36,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90245150] [2022-03-20 10:26:36,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90245150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:26:36,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:26:36,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 10:26:36,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363564553] [2022-03-20 10:26:36,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:36,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 10:26:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 10:26:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 10:26:36,753 INFO L87 Difference]: Start difference. First operand 867 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 10:26:36,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:36,847 INFO L93 Difference]: Finished difference Result 887 states and 1154 transitions. [2022-03-20 10:26:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 10:26:36,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 187 [2022-03-20 10:26:36,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:36,850 INFO L225 Difference]: With dead ends: 887 [2022-03-20 10:26:36,850 INFO L226 Difference]: Without dead ends: 831 [2022-03-20 10:26:36,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 10:26:36,851 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:36,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 143 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-03-20 10:26:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 806. [2022-03-20 10:26:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 604 states have (on average 1.1688741721854305) internal successors, (706), 612 states have internal predecessors, (706), 177 states have call successors, (177), 26 states have call predecessors, (177), 24 states have return successors, (175), 167 states have call predecessors, (175), 175 states have call successors, (175) [2022-03-20 10:26:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1058 transitions. [2022-03-20 10:26:36,904 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1058 transitions. Word has length 187 [2022-03-20 10:26:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:36,905 INFO L478 AbstractCegarLoop]: Abstraction has 806 states and 1058 transitions. [2022-03-20 10:26:36,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 10:26:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1058 transitions. [2022-03-20 10:26:36,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 10:26:36,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:36,907 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:36,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:37,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 10:26:37,116 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:37,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1521127760, now seen corresponding path program 6 times [2022-03-20 10:26:37,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:37,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870608018] [2022-03-20 10:26:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:37,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:37,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:37,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20938153] [2022-03-20 10:26:37,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 10:26:37,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:37,129 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:37,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 10:26:37,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 10:26:37,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:37,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 10:26:37,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2022-03-20 10:26:37,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 10:26:37,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870608018] [2022-03-20 10:26:37,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20938153] [2022-03-20 10:26:37,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20938153] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 10:26:37,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 10:26:37,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 10:26:37,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271359164] [2022-03-20 10:26:37,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 10:26:37,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 10:26:37,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:37,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 10:26:37,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:26:37,474 INFO L87 Difference]: Start difference. First operand 806 states and 1058 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 10:26:37,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:37,536 INFO L93 Difference]: Finished difference Result 853 states and 1107 transitions. [2022-03-20 10:26:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 10:26:37,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 187 [2022-03-20 10:26:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:37,541 INFO L225 Difference]: With dead ends: 853 [2022-03-20 10:26:37,541 INFO L226 Difference]: Without dead ends: 782 [2022-03-20 10:26:37,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-20 10:26:37,543 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:37,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 134 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 10:26:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-03-20 10:26:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 755. [2022-03-20 10:26:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 566 states have (on average 1.1625441696113075) internal successors, (658), 573 states have internal predecessors, (658), 164 states have call successors, (164), 26 states have call predecessors, (164), 24 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-03-20 10:26:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 984 transitions. [2022-03-20 10:26:37,590 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 984 transitions. Word has length 187 [2022-03-20 10:26:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:37,590 INFO L478 AbstractCegarLoop]: Abstraction has 755 states and 984 transitions. [2022-03-20 10:26:37,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 10:26:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 984 transitions. [2022-03-20 10:26:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 10:26:37,593 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:37,593 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:37,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:37,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 10:26:37,797 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash 491630563, now seen corresponding path program 7 times [2022-03-20 10:26:37,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48357921] [2022-03-20 10:26:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:37,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:37,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:37,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755251632] [2022-03-20 10:26:37,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 10:26:37,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:37,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:37,822 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:37,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 10:26:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 10:26:37,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 10:26:37,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-03-20 10:26:38,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-03-20 10:26:38,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:38,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48357921] [2022-03-20 10:26:38,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:38,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755251632] [2022-03-20 10:26:38,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755251632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:38,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:38,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-03-20 10:26:38,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555844927] [2022-03-20 10:26:38,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:38,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 10:26:38,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:38,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 10:26:38,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 10:26:38,494 INFO L87 Difference]: Start difference. First operand 755 states and 984 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-03-20 10:26:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:39,098 INFO L93 Difference]: Finished difference Result 1720 states and 2275 transitions. [2022-03-20 10:26:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 10:26:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 187 [2022-03-20 10:26:39,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:39,104 INFO L225 Difference]: With dead ends: 1720 [2022-03-20 10:26:39,104 INFO L226 Difference]: Without dead ends: 1523 [2022-03-20 10:26:39,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-20 10:26:39,105 INFO L913 BasicCegarLoop]: 201 mSDtfsCounter, 151 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:39,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1094 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 10:26:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2022-03-20 10:26:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1314. [2022-03-20 10:26:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 986 states have (on average 1.1795131845841784) internal successors, (1163), 1002 states have internal predecessors, (1163), 303 states have call successors, (303), 26 states have call predecessors, (303), 24 states have return successors, (301), 285 states have call predecessors, (301), 301 states have call successors, (301) [2022-03-20 10:26:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 1767 transitions. [2022-03-20 10:26:39,247 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 1767 transitions. Word has length 187 [2022-03-20 10:26:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:39,247 INFO L478 AbstractCegarLoop]: Abstraction has 1314 states and 1767 transitions. [2022-03-20 10:26:39,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-03-20 10:26:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 1767 transitions. [2022-03-20 10:26:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 10:26:39,252 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:39,252 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:39,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:39,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:39,463 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1463727385, now seen corresponding path program 8 times [2022-03-20 10:26:39,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:39,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888964784] [2022-03-20 10:26:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:39,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:39,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:39,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345983909] [2022-03-20 10:26:39,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:26:39,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:39,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:39,473 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:39,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 10:26:39,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:26:39,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:39,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 10:26:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-03-20 10:26:39,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2022-03-20 10:26:40,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:40,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888964784] [2022-03-20 10:26:40,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:40,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345983909] [2022-03-20 10:26:40,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345983909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:40,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:40,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 10:26:40,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231850840] [2022-03-20 10:26:40,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:40,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 10:26:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 10:26:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 10:26:40,189 INFO L87 Difference]: Start difference. First operand 1314 states and 1767 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-03-20 10:26:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:41,073 INFO L93 Difference]: Finished difference Result 2714 states and 3675 transitions. [2022-03-20 10:26:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 10:26:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) Word has length 187 [2022-03-20 10:26:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:41,081 INFO L225 Difference]: With dead ends: 2714 [2022-03-20 10:26:41,081 INFO L226 Difference]: Without dead ends: 2417 [2022-03-20 10:26:41,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 10:26:41,083 INFO L913 BasicCegarLoop]: 153 mSDtfsCounter, 232 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:41,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 972 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 10:26:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-03-20 10:26:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1968. [2022-03-20 10:26:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1475 states have (on average 1.1627118644067798) internal successors, (1715), 1503 states have internal predecessors, (1715), 468 states have call successors, (468), 26 states have call predecessors, (468), 24 states have return successors, (466), 438 states have call predecessors, (466), 466 states have call successors, (466) [2022-03-20 10:26:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2649 transitions. [2022-03-20 10:26:41,291 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2649 transitions. Word has length 187 [2022-03-20 10:26:41,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:41,292 INFO L478 AbstractCegarLoop]: Abstraction has 1968 states and 2649 transitions. [2022-03-20 10:26:41,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2022-03-20 10:26:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2649 transitions. [2022-03-20 10:26:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 10:26:41,296 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:41,296 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:41,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:41,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:41,515 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:41,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:41,516 INFO L85 PathProgramCache]: Analyzing trace with hash 656453859, now seen corresponding path program 9 times [2022-03-20 10:26:41,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:41,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519796396] [2022-03-20 10:26:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:41,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:41,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:41,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889875842] [2022-03-20 10:26:41,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 10:26:41,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:41,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:41,524 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:41,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 10:26:42,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-20 10:26:42,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:42,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 10:26:42,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-03-20 10:26:42,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-03-20 10:26:42,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519796396] [2022-03-20 10:26:42,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889875842] [2022-03-20 10:26:42,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889875842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:42,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:42,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-03-20 10:26:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081027055] [2022-03-20 10:26:42,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:42,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 10:26:42,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 10:26:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-20 10:26:42,932 INFO L87 Difference]: Start difference. First operand 1968 states and 2649 transitions. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-03-20 10:26:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:44,512 INFO L93 Difference]: Finished difference Result 3252 states and 4395 transitions. [2022-03-20 10:26:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 10:26:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) Word has length 187 [2022-03-20 10:26:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:44,521 INFO L225 Difference]: With dead ends: 3252 [2022-03-20 10:26:44,521 INFO L226 Difference]: Without dead ends: 2993 [2022-03-20 10:26:44,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=507, Invalid=2573, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 10:26:44,523 INFO L913 BasicCegarLoop]: 332 mSDtfsCounter, 274 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:44,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 2726 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 10:26:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-03-20 10:26:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2462. [2022-03-20 10:26:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 1845 states have (on average 1.1718157181571816) internal successors, (2162), 1887 states have internal predecessors, (2162), 592 states have call successors, (592), 26 states have call predecessors, (592), 24 states have return successors, (590), 548 states have call predecessors, (590), 590 states have call successors, (590) [2022-03-20 10:26:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3344 transitions. [2022-03-20 10:26:44,794 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3344 transitions. Word has length 187 [2022-03-20 10:26:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:44,794 INFO L478 AbstractCegarLoop]: Abstraction has 2462 states and 3344 transitions. [2022-03-20 10:26:44,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 18 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2022-03-20 10:26:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3344 transitions. [2022-03-20 10:26:44,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 10:26:44,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:44,800 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:44,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:45,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:45,005 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:45,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1870351901, now seen corresponding path program 10 times [2022-03-20 10:26:45,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:45,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176788466] [2022-03-20 10:26:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:45,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:45,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:45,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25738923] [2022-03-20 10:26:45,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 10:26:45,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:45,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:45,020 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:45,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 10:26:45,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 10:26:45,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 10:26:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:45,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-20 10:26:46,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:46,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176788466] [2022-03-20 10:26:46,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:46,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25738923] [2022-03-20 10:26:46,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25738923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:46,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:46,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 10:26:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750720094] [2022-03-20 10:26:46,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:46,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 10:26:46,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:46,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 10:26:46,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 10:26:46,166 INFO L87 Difference]: Start difference. First operand 2462 states and 3344 transitions. Second operand has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-03-20 10:26:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:48,425 INFO L93 Difference]: Finished difference Result 9906 states and 14925 transitions. [2022-03-20 10:26:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 10:26:48,426 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) Word has length 187 [2022-03-20 10:26:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:48,452 INFO L225 Difference]: With dead ends: 9906 [2022-03-20 10:26:48,452 INFO L226 Difference]: Without dead ends: 9897 [2022-03-20 10:26:48,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2691, Invalid=4619, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 10:26:48,455 INFO L913 BasicCegarLoop]: 153 mSDtfsCounter, 1412 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:48,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 879 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [990 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 10:26:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2022-03-20 10:26:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 9645. [2022-03-20 10:26:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9645 states, 7245 states have (on average 1.2641821946169771) internal successors, (9159), 7308 states have internal predecessors, (9159), 2355 states have call successors, (2355), 46 states have call predecessors, (2355), 44 states have return successors, (2353), 2290 states have call predecessors, (2353), 2353 states have call successors, (2353) [2022-03-20 10:26:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9645 states to 9645 states and 13867 transitions. [2022-03-20 10:26:49,629 INFO L78 Accepts]: Start accepts. Automaton has 9645 states and 13867 transitions. Word has length 187 [2022-03-20 10:26:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:49,631 INFO L478 AbstractCegarLoop]: Abstraction has 9645 states and 13867 transitions. [2022-03-20 10:26:49,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.521739130434782) internal successors, (208), 46 states have internal predecessors, (208), 44 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 42 states have call predecessors, (46), 43 states have call successors, (46) [2022-03-20 10:26:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 9645 states and 13867 transitions. [2022-03-20 10:26:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 10:26:49,644 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:49,644 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:49,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:49,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:49,860 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash -517824918, now seen corresponding path program 2 times [2022-03-20 10:26:49,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:49,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684008195] [2022-03-20 10:26:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:49,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:49,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390121959] [2022-03-20 10:26:49,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:26:49,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:49,868 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:49,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 10:26:49,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:26:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 10:26:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:50,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 10:26:51,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:51,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684008195] [2022-03-20 10:26:51,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:51,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390121959] [2022-03-20 10:26:51,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390121959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:51,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:51,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 10:26:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254837875] [2022-03-20 10:26:51,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:51,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 10:26:51,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 10:26:51,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 10:26:51,031 INFO L87 Difference]: Start difference. First operand 9645 states and 13867 transitions. Second operand has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-03-20 10:26:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:53,496 INFO L93 Difference]: Finished difference Result 14792 states and 21463 transitions. [2022-03-20 10:26:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 10:26:53,496 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) Word has length 193 [2022-03-20 10:26:53,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:53,514 INFO L225 Difference]: With dead ends: 14792 [2022-03-20 10:26:53,515 INFO L226 Difference]: Without dead ends: 7697 [2022-03-20 10:26:53,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 10:26:53,530 INFO L913 BasicCegarLoop]: 159 mSDtfsCounter, 1386 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:53,530 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 1018 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 10:26:53,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2022-03-20 10:26:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7470. [2022-03-20 10:26:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7470 states, 5600 states have (on average 1.1821428571428572) internal successors, (6620), 5644 states have internal predecessors, (6620), 1823 states have call successors, (1823), 48 states have call predecessors, (1823), 46 states have return successors, (1821), 1777 states have call predecessors, (1821), 1821 states have call successors, (1821) [2022-03-20 10:26:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 10264 transitions. [2022-03-20 10:26:54,319 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 10264 transitions. Word has length 193 [2022-03-20 10:26:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:54,319 INFO L478 AbstractCegarLoop]: Abstraction has 7470 states and 10264 transitions. [2022-03-20 10:26:54,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.479166666666667) internal successors, (215), 48 states have internal predecessors, (215), 46 states have call successors, (50), 25 states have call predecessors, (50), 24 states have return successors, (48), 44 states have call predecessors, (48), 45 states have call successors, (48) [2022-03-20 10:26:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 10264 transitions. [2022-03-20 10:26:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 10:26:54,326 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:54,326 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:54,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 10:26:54,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:54,540 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1869519853, now seen corresponding path program 2 times [2022-03-20 10:26:54,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:54,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791199444] [2022-03-20 10:26:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:54,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:54,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:54,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168902770] [2022-03-20 10:26:54,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 10:26:54,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:54,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:54,548 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:54,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 10:26:54,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 10:26:54,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:54,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 10:26:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:26:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 10:26:55,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:26:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-20 10:26:55,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:26:55,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791199444] [2022-03-20 10:26:55,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:26:55,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168902770] [2022-03-20 10:26:55,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168902770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 10:26:55,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 10:26:55,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 10:26:55,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995059794] [2022-03-20 10:26:55,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 10:26:55,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 10:26:55,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:26:55,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 10:26:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 10:26:55,601 INFO L87 Difference]: Start difference. First operand 7470 states and 10264 transitions. Second operand has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-03-20 10:26:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:26:57,985 INFO L93 Difference]: Finished difference Result 8076 states and 11149 transitions. [2022-03-20 10:26:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 10:26:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 199 [2022-03-20 10:26:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:26:58,013 INFO L225 Difference]: With dead ends: 8076 [2022-03-20 10:26:58,013 INFO L226 Difference]: Without dead ends: 7927 [2022-03-20 10:26:58,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3046, Invalid=5326, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 10:26:58,018 INFO L913 BasicCegarLoop]: 165 mSDtfsCounter, 1526 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 1054 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1054 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 10:26:58,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 1003 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1054 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 10:26:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2022-03-20 10:26:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7220. [2022-03-20 10:26:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7220 states, 5413 states have (on average 1.1211897284315537) internal successors, (6069), 5457 states have internal predecessors, (6069), 1758 states have call successors, (1758), 50 states have call predecessors, (1758), 48 states have return successors, (1756), 1712 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-03-20 10:26:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7220 states to 7220 states and 9583 transitions. [2022-03-20 10:26:58,756 INFO L78 Accepts]: Start accepts. Automaton has 7220 states and 9583 transitions. Word has length 199 [2022-03-20 10:26:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:26:58,757 INFO L478 AbstractCegarLoop]: Abstraction has 7220 states and 9583 transitions. [2022-03-20 10:26:58,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.44) internal successors, (222), 50 states have internal predecessors, (222), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-03-20 10:26:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7220 states and 9583 transitions. [2022-03-20 10:26:58,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-03-20 10:26:58,775 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:26:58,775 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:26:58,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 10:26:58,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:58,991 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:26:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:26:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1162964928, now seen corresponding path program 11 times [2022-03-20 10:26:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:26:58,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040240425] [2022-03-20 10:26:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:26:58,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:26:59,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:26:59,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411400204] [2022-03-20 10:26:59,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 10:26:59,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:26:59,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:26:59,005 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:26:59,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 10:26:59,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-20 10:26:59,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:26:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 10:26:59,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 10:27:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5272 backedges. 480 proven. 972 refuted. 20 times theorem prover too weak. 3800 trivial. 0 not checked. [2022-03-20 10:27:37,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 10:34:31,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 10:34:31,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040240425] [2022-03-20 10:34:31,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 10:34:31,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411400204] [2022-03-20 10:34:31,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411400204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 10:34:31,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 10:34:31,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-20 10:34:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987917572] [2022-03-20 10:34:31,743 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 10:34:31,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 10:34:31,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 10:34:31,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 10:34:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=906, Unknown=19, NotChecked=0, Total=1190 [2022-03-20 10:34:31,744 INFO L87 Difference]: Start difference. First operand 7220 states and 9583 transitions. Second operand has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) [2022-03-20 10:35:24,784 WARN L232 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 56 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:35:47,083 WARN L232 SmtUtils]: Spent 10.15s on a formula simplification. DAG size of input: 77 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:36:00,071 WARN L232 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 63 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:36:23,984 WARN L232 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 61 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 10:37:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 10:37:07,382 INFO L93 Difference]: Finished difference Result 15342 states and 20592 transitions. [2022-03-20 10:37:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 10:37:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) Word has length 379 [2022-03-20 10:37:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 10:37:07,455 INFO L225 Difference]: With dead ends: 15342 [2022-03-20 10:37:07,455 INFO L226 Difference]: Without dead ends: 15060 [2022-03-20 10:37:07,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 636 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 198.0s TimeCoverageRelationStatistics Valid=907, Invalid=3081, Unknown=44, NotChecked=0, Total=4032 [2022-03-20 10:37:07,477 INFO L913 BasicCegarLoop]: 318 mSDtfsCounter, 257 mSDsluCounter, 3650 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 3968 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1081 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 10:37:07,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 3968 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 882 Invalid, 0 Unknown, 1081 Unchecked, 0.9s Time] [2022-03-20 10:37:07,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15060 states. [2022-03-20 10:37:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15060 to 14181. [2022-03-20 10:37:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14181 states, 10637 states have (on average 1.1329322177305632) internal successors, (12051), 10738 states have internal predecessors, (12051), 3495 states have call successors, (3495), 50 states have call predecessors, (3495), 48 states have return successors, (3493), 3392 states have call predecessors, (3493), 3493 states have call successors, (3493) [2022-03-20 10:37:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14181 states to 14181 states and 19039 transitions. [2022-03-20 10:37:09,313 INFO L78 Accepts]: Start accepts. Automaton has 14181 states and 19039 transitions. Word has length 379 [2022-03-20 10:37:09,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 10:37:09,313 INFO L478 AbstractCegarLoop]: Abstraction has 14181 states and 19039 transitions. [2022-03-20 10:37:09,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 19 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 18 states have call predecessors, (44), 18 states have call successors, (44) [2022-03-20 10:37:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 14181 states and 19039 transitions. [2022-03-20 10:37:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-03-20 10:37:09,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 10:37:09,347 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 10:37:09,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 10:37:09,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 10:37:09,559 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 10:37:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 10:37:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1363840832, now seen corresponding path program 12 times [2022-03-20 10:37:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 10:37:09,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503854149] [2022-03-20 10:37:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 10:37:09,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 10:37:09,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 10:37:09,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777426975] [2022-03-20 10:37:09,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 10:37:09,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 10:37:09,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 10:37:09,572 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 10:37:09,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 10:37:22,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-20 10:37:22,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 10:37:22,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 10:37:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates...