/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/prodbin-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 08:59:25,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 08:59:25,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 08:59:25,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 08:59:25,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 08:59:25,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 08:59:25,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 08:59:25,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 08:59:25,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 08:59:25,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 08:59:25,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 08:59:25,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 08:59:25,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 08:59:25,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 08:59:25,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 08:59:25,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 08:59:25,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 08:59:25,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 08:59:25,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 08:59:25,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 08:59:25,492 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 08:59:25,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 08:59:25,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 08:59:25,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 08:59:25,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 08:59:25,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 08:59:25,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 08:59:25,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 08:59:25,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 08:59:25,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 08:59:25,518 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 08:59:25,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 08:59:25,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 08:59:25,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 08:59:25,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 08:59:25,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 08:59:25,519 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 08:59:25,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 08:59:25,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 08:59:25,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 08:59:25,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 08:59:25,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 08:59:25,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 08:59:25,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 08:59:25,521 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 08:59:25,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 08:59:25,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 08:59:25,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 08:59:25,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 08:59:25,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:59:25,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 08:59:25,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 08:59:25,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 08:59:25,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 08:59:25,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 08:59:25,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 08:59:25,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 08:59:25,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 08:59:25,523 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 08:59:25,523 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 08:59:25,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 08:59:25,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 08:59:25,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 08:59:25,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 08:59:25,752 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 08:59:25,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2022-04-05 08:59:25,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26a5fe16c/5f3d8a98a52746f68a7453fb6be7d42c/FLAGd3f04ddfb [2022-04-05 08:59:26,187 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 08:59:26,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2022-04-05 08:59:26,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26a5fe16c/5f3d8a98a52746f68a7453fb6be7d42c/FLAGd3f04ddfb [2022-04-05 08:59:26,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26a5fe16c/5f3d8a98a52746f68a7453fb6be7d42c [2022-04-05 08:59:26,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 08:59:26,208 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 08:59:26,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 08:59:26,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 08:59:26,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 08:59:26,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4c1d5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26, skipping insertion in model container [2022-04-05 08:59:26,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 08:59:26,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 08:59:26,373 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/prodbin-ll_unwindbound50.c[537,550] [2022-04-05 08:59:26,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:59:26,391 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 08:59:26,400 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/prodbin-ll_unwindbound50.c[537,550] [2022-04-05 08:59:26,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 08:59:26,419 INFO L208 MainTranslator]: Completed translation [2022-04-05 08:59:26,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26 WrapperNode [2022-04-05 08:59:26,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 08:59:26,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 08:59:26,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 08:59:26,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 08:59:26,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 08:59:26,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 08:59:26,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 08:59:26,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 08:59:26,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 08:59:26,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:26,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 08:59:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 08:59:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 08:59:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 08:59:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 08:59:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 08:59:26,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 08:59:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 08:59:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 08:59:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 08:59:26,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 08:59:26,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 08:59:26,506 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 08:59:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 08:59:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 08:59:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 08:59:26,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 08:59:26,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 08:59:26,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 08:59:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 08:59:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 08:59:26,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 08:59:26,559 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 08:59:26,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 08:59:26,660 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 08:59:26,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 08:59:26,664 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 08:59:26,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:59:26 BoogieIcfgContainer [2022-04-05 08:59:26,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 08:59:26,666 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 08:59:26,666 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 08:59:26,667 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 08:59:26,669 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:59:26" (1/1) ... [2022-04-05 08:59:26,671 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 08:59:26,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:59:26 BasicIcfg [2022-04-05 08:59:26,681 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 08:59:26,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 08:59:26,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 08:59:26,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 08:59:26,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 08:59:26" (1/4) ... [2022-04-05 08:59:26,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69134e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:59:26, skipping insertion in model container [2022-04-05 08:59:26,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 08:59:26" (2/4) ... [2022-04-05 08:59:26,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69134e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 08:59:26, skipping insertion in model container [2022-04-05 08:59:26,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 08:59:26" (3/4) ... [2022-04-05 08:59:26,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69134e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 08:59:26, skipping insertion in model container [2022-04-05 08:59:26,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 08:59:26" (4/4) ... [2022-04-05 08:59:26,686 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound50.cqvasr [2022-04-05 08:59:26,689 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 08:59:26,689 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 08:59:26,732 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 08:59:26,737 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 08:59:26,737 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 08:59:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 08:59:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 08:59:26,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:26,777 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:26,777 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2022-04-05 08:59:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:26,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776329836] [2022-04-05 08:59:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:26,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 08:59:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:26,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 08:59:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:26,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776329836] [2022-04-05 08:59:27,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776329836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:59:27,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:59:27,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 08:59:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765041328] [2022-04-05 08:59:27,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:59:27,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 08:59:27,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:27,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 08:59:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:59:27,026 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:59:27,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:27,083 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-05 08:59:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 08:59:27,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 08:59:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:27,093 INFO L225 Difference]: With dead ends: 52 [2022-04-05 08:59:27,093 INFO L226 Difference]: Without dead ends: 26 [2022-04-05 08:59:27,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 08:59:27,099 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:27,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:59:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-05 08:59:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-05 08:59:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 08:59:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-05 08:59:27,122 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-04-05 08:59:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:27,123 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-05 08:59:27,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:59:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-05 08:59:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:59:27,123 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:27,124 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:27,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 08:59:27,124 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:27,124 INFO L85 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2022-04-05 08:59:27,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:27,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818997307] [2022-04-05 08:59:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:27,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:27,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:27,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652729209] [2022-04-05 08:59:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:27,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:27,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:27,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 08:59:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:27,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 08:59:27,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:27,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:59:27,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:27,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818997307] [2022-04-05 08:59:27,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:27,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652729209] [2022-04-05 08:59:27,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652729209] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:59:27,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:59:27,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 08:59:27,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447786047] [2022-04-05 08:59:27,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:59:27,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 08:59:27,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:27,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 08:59:27,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 08:59:27,251 INFO L87 Difference]: Start difference. First operand 25 states and 28 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 08:59:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:27,260 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-05 08:59:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 08:59:27,260 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-05 08:59:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:27,261 INFO L225 Difference]: With dead ends: 34 [2022-04-05 08:59:27,261 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 08:59:27,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 08:59:27,262 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:27,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:59:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 08:59:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-05 08:59:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 08:59:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-05 08:59:27,267 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-04-05 08:59:27,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:27,267 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-05 08:59:27,268 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-05 08:59:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-05 08:59:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 08:59:27,268 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:27,268 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:27,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:27,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:27,484 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2022-04-05 08:59:27,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:27,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332000968] [2022-04-05 08:59:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:27,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:27,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:27,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570225640] [2022-04-05 08:59:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:27,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:27,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:27,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:27,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 08:59:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:27,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 08:59:27,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:27,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:59:27,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332000968] [2022-04-05 08:59:27,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570225640] [2022-04-05 08:59:27,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570225640] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:59:27,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:59:27,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 08:59:27,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210193918] [2022-04-05 08:59:27,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:59:27,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 08:59:27,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:27,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 08:59:27,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 08:59:27,625 INFO L87 Difference]: Start difference. First operand 27 states and 30 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:59:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:27,670 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-04-05 08:59:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 08:59:27,670 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 08:59:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:27,671 INFO L225 Difference]: With dead ends: 38 [2022-04-05 08:59:27,671 INFO L226 Difference]: Without dead ends: 36 [2022-04-05 08:59:27,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:59:27,672 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:27,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:59:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-05 08:59:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-04-05 08:59:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 08:59:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-05 08:59:27,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-04-05 08:59:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:27,678 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-05 08:59:27,678 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 08:59:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-05 08:59:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 08:59:27,678 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:27,678 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:27,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:27,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 08:59:27,896 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2022-04-05 08:59:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:27,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636190750] [2022-04-05 08:59:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:27,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:27,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873478656] [2022-04-05 08:59:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:27,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:27,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:27,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:27,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 08:59:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:27,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:59:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:28,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 08:59:28,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636190750] [2022-04-05 08:59:28,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873478656] [2022-04-05 08:59:28,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873478656] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 08:59:28,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 08:59:28,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 08:59:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765199564] [2022-04-05 08:59:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 08:59:28,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 08:59:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 08:59:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 08:59:28,042 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:59:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:28,100 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-05 08:59:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 08:59:28,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-05 08:59:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:28,102 INFO L225 Difference]: With dead ends: 42 [2022-04-05 08:59:28,102 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 08:59:28,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:59:28,106 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:28,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:59:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 08:59:28,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-04-05 08:59:28,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 08:59:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-05 08:59:28,112 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-04-05 08:59:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:28,112 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-05 08:59:28,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 08:59:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-05 08:59:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:59:28,113 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:28,113 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:28,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:28,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:28,314 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2022-04-05 08:59:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:28,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524447859] [2022-04-05 08:59:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:28,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:28,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:28,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652001879] [2022-04-05 08:59:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:28,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:28,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:28,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 08:59:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 08:59:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:28,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:28,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:28,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524447859] [2022-04-05 08:59:28,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:28,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652001879] [2022-04-05 08:59:28,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652001879] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:28,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:28,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-05 08:59:28,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950755603] [2022-04-05 08:59:28,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:28,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 08:59:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:28,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 08:59:28,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-05 08:59:28,498 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 08:59:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:28,543 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-04-05 08:59:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 08:59:28,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-04-05 08:59:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:28,545 INFO L225 Difference]: With dead ends: 70 [2022-04-05 08:59:28,545 INFO L226 Difference]: Without dead ends: 63 [2022-04-05 08:59:28,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-05 08:59:28,545 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:28,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 08:59:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-05 08:59:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-04-05 08:59:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 08:59:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-04-05 08:59:28,551 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-04-05 08:59:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:28,552 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-04-05 08:59:28,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 08:59:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-04-05 08:59:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:59:28,552 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:28,552 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] [2022-04-05 08:59:28,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:28,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:28,769 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2022-04-05 08:59:28,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:28,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12427499] [2022-04-05 08:59:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:28,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:28,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:28,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231807348] [2022-04-05 08:59:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:28,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:28,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:28,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:28,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 08:59:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:28,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 08:59:28,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:32,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:38,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:38,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12427499] [2022-04-05 08:59:38,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:38,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231807348] [2022-04-05 08:59:38,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231807348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:38,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:38,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-05 08:59:38,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613008546] [2022-04-05 08:59:38,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:38,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 08:59:38,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 08:59:38,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-04-05 08:59:38,930 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:59:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:44,766 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2022-04-05 08:59:44,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 08:59:44,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-05 08:59:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:44,768 INFO L225 Difference]: With dead ends: 94 [2022-04-05 08:59:44,768 INFO L226 Difference]: Without dead ends: 92 [2022-04-05 08:59:44,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-04-05 08:59:44,769 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:44,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 156 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-05 08:59:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-05 08:59:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-04-05 08:59:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 08:59:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-04-05 08:59:44,777 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 28 [2022-04-05 08:59:44,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:44,778 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-04-05 08:59:44,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 08:59:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-04-05 08:59:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 08:59:44,778 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:44,778 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] [2022-04-05 08:59:44,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:44,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:44,995 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2022-04-05 08:59:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:44,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222169199] [2022-04-05 08:59:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:45,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:45,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709137867] [2022-04-05 08:59:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:45,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:45,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:45,011 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:45,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 08:59:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:45,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 08:59:45,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:46,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 08:59:46,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222169199] [2022-04-05 08:59:46,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709137867] [2022-04-05 08:59:46,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709137867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:46,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:46,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-04-05 08:59:46,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824215683] [2022-04-05 08:59:46,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:46,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 08:59:46,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:46,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 08:59:46,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-04-05 08:59:46,669 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:59:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:47,749 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2022-04-05 08:59:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 08:59:47,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-04-05 08:59:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:47,750 INFO L225 Difference]: With dead ends: 123 [2022-04-05 08:59:47,750 INFO L226 Difference]: Without dead ends: 112 [2022-04-05 08:59:47,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-04-05 08:59:47,751 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:47,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 153 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 08:59:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-05 08:59:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2022-04-05 08:59:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 08:59:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-04-05 08:59:47,759 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2022-04-05 08:59:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:47,760 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-04-05 08:59:47,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 08:59:47,760 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-04-05 08:59:47,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 08:59:47,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:47,761 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] [2022-04-05 08:59:47,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:47,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:47,961 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:47,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:47,962 INFO L85 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2022-04-05 08:59:47,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:47,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24629723] [2022-04-05 08:59:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:47,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:47,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:47,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665314205] [2022-04-05 08:59:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:47,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:47,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:47,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:48,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 08:59:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:48,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 08:59:48,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 08:59:48,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 08:59:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 08:59:48,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 08:59:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24629723] [2022-04-05 08:59:48,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 08:59:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665314205] [2022-04-05 08:59:48,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665314205] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 08:59:48,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 08:59:48,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-05 08:59:48,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401699322] [2022-04-05 08:59:48,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 08:59:48,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 08:59:48,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 08:59:48,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 08:59:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 08:59:48,194 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 08:59:50,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 08:59:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 08:59:50,282 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2022-04-05 08:59:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 08:59:50,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-05 08:59:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 08:59:50,283 INFO L225 Difference]: With dead ends: 100 [2022-04-05 08:59:50,283 INFO L226 Difference]: Without dead ends: 90 [2022-04-05 08:59:50,284 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 08:59:50,284 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-05 08:59:50,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 77 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-05 08:59:50,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-05 08:59:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-04-05 08:59:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 08:59:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-04-05 08:59:50,290 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 34 [2022-04-05 08:59:50,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 08:59:50,291 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-04-05 08:59:50,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 08:59:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-04-05 08:59:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-05 08:59:50,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 08:59:50,292 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 08:59:50,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 08:59:50,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:50,500 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 08:59:50,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 08:59:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash 199111383, now seen corresponding path program 1 times [2022-04-05 08:59:50,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 08:59:50,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104662275] [2022-04-05 08:59:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:50,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 08:59:50,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 08:59:50,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053881497] [2022-04-05 08:59:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 08:59:50,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 08:59:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 08:59:50,522 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 08:59:50,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 08:59:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 08:59:50,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 08:59:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 08:59:55,258 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:00:18,729 WARN L232 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 64 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 09:04:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 09:04:33,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:04:37,380 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:04:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 09:04:40,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:04:40,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104662275] [2022-04-05 09:04:40,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:04:40,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053881497] [2022-04-05 09:04:40,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053881497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:04:40,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:04:40,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-04-05 09:04:40,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694615176] [2022-04-05 09:04:40,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:04:40,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 09:04:40,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:04:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 09:04:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=456, Unknown=2, NotChecked=0, Total=552 [2022-04-05 09:04:40,559 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:04:42,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:05:57,392 WARN L232 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 09:06:00,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:06:01,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:06:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:06:09,583 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2022-04-05 09:06:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 09:06:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2022-04-05 09:06:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:06:09,584 INFO L225 Difference]: With dead ends: 127 [2022-04-05 09:06:09,584 INFO L226 Difference]: Without dead ends: 125 [2022-04-05 09:06:09,585 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 102.3s TimeCoverageRelationStatistics Valid=192, Invalid=995, Unknown=3, NotChecked=0, Total=1190 [2022-04-05 09:06:09,585 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 53 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-04-05 09:06:09,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 262 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 388 Invalid, 0 Unknown, 34 Unchecked, 9.5s Time] [2022-04-05 09:06:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-05 09:06:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-04-05 09:06:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 94 states have (on average 1.148936170212766) internal successors, (108), 98 states have internal predecessors, (108), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 09:06:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2022-04-05 09:06:09,594 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 48 [2022-04-05 09:06:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:06:09,594 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2022-04-05 09:06:09,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-05 09:06:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2022-04-05 09:06:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 09:06:09,596 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:06:09,596 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:06:09,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 09:06:09,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 09:06:09,808 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:06:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:06:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash -831185954, now seen corresponding path program 2 times [2022-04-05 09:06:09,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:06:09,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773492539] [2022-04-05 09:06:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:06:09,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:06:09,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:06:09,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083723560] [2022-04-05 09:06:09,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:06:09,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:06:09,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:06:09,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:06:09,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 09:06:09,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:06:09,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:06:09,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 09:06:09,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:06:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 09:06:10,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:06:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 09:06:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:06:10,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773492539] [2022-04-05 09:06:10,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:06:10,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083723560] [2022-04-05 09:06:10,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083723560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:06:10,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:06:10,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-05 09:06:10,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117533627] [2022-04-05 09:06:10,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:06:10,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 09:06:10,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:06:10,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 09:06:10,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-05 09:06:10,403 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-05 09:06:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:06:10,738 INFO L93 Difference]: Finished difference Result 302 states and 347 transitions. [2022-04-05 09:06:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 09:06:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 58 [2022-04-05 09:06:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:06:10,740 INFO L225 Difference]: With dead ends: 302 [2022-04-05 09:06:10,740 INFO L226 Difference]: Without dead ends: 295 [2022-04-05 09:06:10,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-04-05 09:06:10,741 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:06:10,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 168 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 09:06:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-04-05 09:06:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 285. [2022-04-05 09:06:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 223 states have (on average 1.1345291479820627) internal successors, (253), 232 states have internal predecessors, (253), 33 states have call successors, (33), 29 states have call predecessors, (33), 28 states have return successors, (31), 23 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-05 09:06:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 317 transitions. [2022-04-05 09:06:10,761 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 317 transitions. Word has length 58 [2022-04-05 09:06:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:06:10,761 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 317 transitions. [2022-04-05 09:06:10,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-05 09:06:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 317 transitions. [2022-04-05 09:06:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 09:06:10,762 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:06:10,762 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:06:10,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 09:06:10,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 09:06:10,984 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:06:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:06:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash -339082250, now seen corresponding path program 2 times [2022-04-05 09:06:10,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:06:10,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720184576] [2022-04-05 09:06:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:06:10,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:06:10,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:06:10,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717069214] [2022-04-05 09:06:10,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:06:10,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:06:10,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:06:10,992 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 09:06:10,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 09:06:11,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:06:11,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:06:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-05 09:06:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:06:13,195 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:06:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 09:06:15,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:06:20,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:06:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720184576] [2022-04-05 09:06:20,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:06:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717069214] [2022-04-05 09:06:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717069214] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 09:06:20,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 09:06:20,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-05 09:06:20,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692959307] [2022-04-05 09:06:20,252 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 09:06:20,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-05 09:06:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:06:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-05 09:06:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-04-05 09:06:20,253 INFO L87 Difference]: Start difference. First operand 285 states and 317 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 09:06:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:06:23,563 INFO L93 Difference]: Finished difference Result 307 states and 343 transitions. [2022-04-05 09:06:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 09:06:23,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-04-05 09:06:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:06:23,565 INFO L225 Difference]: With dead ends: 307 [2022-04-05 09:06:23,565 INFO L226 Difference]: Without dead ends: 305 [2022-04-05 09:06:23,566 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 09:06:23,566 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-05 09:06:23,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 331 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 436 Invalid, 0 Unknown, 74 Unchecked, 2.9s Time] [2022-04-05 09:06:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-04-05 09:06:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-04-05 09:06:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 239 states have (on average 1.1338912133891212) internal successors, (271), 249 states have internal predecessors, (271), 36 states have call successors, (36), 30 states have call predecessors, (36), 29 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-05 09:06:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 341 transitions. [2022-04-05 09:06:23,582 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 341 transitions. Word has length 58 [2022-04-05 09:06:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:06:23,583 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 341 transitions. [2022-04-05 09:06:23,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-05 09:06:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 341 transitions. [2022-04-05 09:06:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 09:06:23,584 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:06:23,584 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:06:23,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 09:06:23,784 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,SelfDestructingSolverStorable10 [2022-04-05 09:06:23,786 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:06:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:06:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1548458294, now seen corresponding path program 3 times [2022-04-05 09:06:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:06:23,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38451056] [2022-04-05 09:06:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:06:23,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:06:23,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:06:23,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730574807] [2022-04-05 09:06:23,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 09:06:23,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:06:23,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:06:23,794 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) [2022-04-05 09:06:23,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 09:06:23,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 09:06:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:06:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 09:06:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 09:06:27,125 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 09:06:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-05 09:06:30,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 09:06:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 09:06:35,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 09:06:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38451056] [2022-04-05 09:06:35,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 09:06:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730574807] [2022-04-05 09:06:35,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730574807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 09:06:35,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 09:06:35,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-05 09:06:35,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022826193] [2022-04-05 09:06:35,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 09:06:35,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 09:06:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 09:06:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 09:06:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=268, Unknown=3, NotChecked=0, Total=342 [2022-04-05 09:06:35,985 INFO L87 Difference]: Start difference. First operand 305 states and 341 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-05 09:06:38,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:06:39,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 09:06:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 09:06:42,625 INFO L93 Difference]: Finished difference Result 383 states and 431 transitions. [2022-04-05 09:06:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 09:06:42,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 58 [2022-04-05 09:06:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 09:06:42,627 INFO L225 Difference]: With dead ends: 383 [2022-04-05 09:06:42,627 INFO L226 Difference]: Without dead ends: 381 [2022-04-05 09:06:42,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=131, Invalid=466, Unknown=3, NotChecked=0, Total=600 [2022-04-05 09:06:42,628 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-04-05 09:06:42,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 221 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 214 Invalid, 0 Unknown, 1 Unchecked, 5.1s Time] [2022-04-05 09:06:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-04-05 09:06:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 210. [2022-04-05 09:06:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 165 states have (on average 1.1575757575757575) internal successors, (191), 166 states have internal predecessors, (191), 23 states have call successors, (23), 22 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 09:06:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 235 transitions. [2022-04-05 09:06:42,641 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 235 transitions. Word has length 58 [2022-04-05 09:06:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 09:06:42,641 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 235 transitions. [2022-04-05 09:06:42,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-05 09:06:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 235 transitions. [2022-04-05 09:06:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-05 09:06:42,642 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 09:06:42,642 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 09:06:42,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 09:06:42,858 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,SelfDestructingSolverStorable11 [2022-04-05 09:06:42,858 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 09:06:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 09:06:42,859 INFO L85 PathProgramCache]: Analyzing trace with hash 680514773, now seen corresponding path program 2 times [2022-04-05 09:06:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 09:06:42,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831923434] [2022-04-05 09:06:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 09:06:42,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 09:06:42,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 09:06:42,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017873274] [2022-04-05 09:06:42,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 09:06:42,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 09:06:42,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 09:06:42,867 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) [2022-04-05 09:06:42,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 09:06:42,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 09:06:42,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 09:06:42,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-05 09:06:42,917 INFO L286 TraceCheckSpWp]: Computing forward predicates...