/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 23:27:17,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 23:27:17,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 23:27:18,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 23:27:18,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 23:27:18,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 23:27:18,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 23:27:18,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 23:27:18,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 23:27:18,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 23:27:18,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 23:27:18,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 23:27:18,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 23:27:18,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 23:27:18,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 23:27:18,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 23:27:18,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 23:27:18,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 23:27:18,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 23:27:18,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 23:27:18,020 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 23:27:18,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 23:27:18,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 23:27:18,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 23:27:18,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 23:27:18,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 23:27:18,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 23:27:18,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 23:27:18,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 23:27:18,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 23:27:18,064 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 23:27:18,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 23:27:18,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 23:27:18,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 23:27:18,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 23:27:18,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 23:27:18,065 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 23:27:18,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 23:27:18,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 23:27:18,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 23:27:18,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 23:27:18,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 23:27:18,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 23:27:18,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 23:27:18,066 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 23:27:18,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 23:27:18,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 23:27:18,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 23:27:18,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 23:27:18,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:27:18,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 23:27:18,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 23:27:18,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 23:27:18,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 23:27:18,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 23:27:18,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 23:27:18,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 23:27:18,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 23:27:18,068 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 23:27:18,068 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 23:27:18,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 23:27:18,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 23:27:18,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 23:27:18,257 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 23:27:18,259 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 23:27:18,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i [2022-03-18 23:27:18,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bc603db2/abb6cd09a3fd40e6b5e76c0a30a22269/FLAGc0f6b601c [2022-03-18 23:27:18,617 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 23:27:18,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i [2022-03-18 23:27:18,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bc603db2/abb6cd09a3fd40e6b5e76c0a30a22269/FLAGc0f6b601c [2022-03-18 23:27:19,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bc603db2/abb6cd09a3fd40e6b5e76c0a30a22269 [2022-03-18 23:27:19,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 23:27:19,058 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 23:27:19,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 23:27:19,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 23:27:19,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 23:27:19,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5779e50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19, skipping insertion in model container [2022-03-18 23:27:19,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 23:27:19,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 23:27:19,208 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2022-03-18 23:27:19,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:27:19,224 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 23:27:19,269 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2022-03-18 23:27:19,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:27:19,296 INFO L208 MainTranslator]: Completed translation [2022-03-18 23:27:19,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19 WrapperNode [2022-03-18 23:27:19,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 23:27:19,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 23:27:19,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 23:27:19,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 23:27:19,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 23:27:19,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 23:27:19,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 23:27:19,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 23:27:19,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:27:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:27:19,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 23:27:19,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 23:27:19,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 23:27:19,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 23:27:19,378 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 23:27:19,378 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 23:27:19,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 23:27:19,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 23:27:19,378 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 23:27:19,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 23:27:19,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 23:27:19,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 23:27:19,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 23:27:19,426 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 23:27:19,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 23:27:19,586 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 23:27:19,592 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 23:27:19,592 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 23:27:19,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:27:19 BoogieIcfgContainer [2022-03-18 23:27:19,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 23:27:19,594 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 23:27:19,594 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 23:27:19,608 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 23:27:19,611 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:27:19" (1/1) ... [2022-03-18 23:27:19,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:27:19 BasicIcfg [2022-03-18 23:27:19,623 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 23:27:19,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 23:27:19,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 23:27:19,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 23:27:19,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:27:19" (1/4) ... [2022-03-18 23:27:19,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307c1118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:27:19, skipping insertion in model container [2022-03-18 23:27:19,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:27:19" (2/4) ... [2022-03-18 23:27:19,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307c1118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:27:19, skipping insertion in model container [2022-03-18 23:27:19,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:27:19" (3/4) ... [2022-03-18 23:27:19,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307c1118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 11:27:19, skipping insertion in model container [2022-03-18 23:27:19,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:27:19" (4/4) ... [2022-03-18 23:27:19,645 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.iqvasr [2022-03-18 23:27:19,649 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 23:27:19,649 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 23:27:19,681 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 23:27:19,685 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 23:27:19,686 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 23:27:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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) [2022-03-18 23:27:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 23:27:19,708 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:27:19,709 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:27:19,709 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:27:19,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:27:19,713 INFO L85 PathProgramCache]: Analyzing trace with hash 483266332, now seen corresponding path program 1 times [2022-03-18 23:27:19,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:27:19,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506869183] [2022-03-18 23:27:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:27:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:27:19,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 23:27:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:27:19,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 23:27:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:27:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:27:19,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:27:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506869183] [2022-03-18 23:27:19,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506869183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:27:19,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:27:19,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 23:27:19,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799454584] [2022-03-18 23:27:19,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:27:19,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 23:27:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:27:19,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 23:27:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:27:19,959 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:27:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:27:20,013 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-03-18 23:27:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 23:27:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-18 23:27:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:27:20,025 INFO L225 Difference]: With dead ends: 51 [2022-03-18 23:27:20,025 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 23:27:20,028 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:27:20,031 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:27:20,032 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:27:20,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 23:27:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 23:27:20,075 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) [2022-03-18 23:27:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-18 23:27:20,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-03-18 23:27:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:27:20,078 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-18 23:27:20,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:27:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-18 23:27:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 23:27:20,079 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:27:20,079 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:27:20,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 23:27:20,080 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:27:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:27:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2138426952, now seen corresponding path program 1 times [2022-03-18 23:27:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:27:20,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409539845] [2022-03-18 23:27:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:27:20,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:27:20,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580984029] [2022-03-18 23:27:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:20,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:27:20,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:27:20,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:27:20,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 23:27:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:27:20,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 23:27:20,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:27:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:27:20,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:27:20,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:27:20,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409539845] [2022-03-18 23:27:20,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:27:20,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580984029] [2022-03-18 23:27:20,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580984029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:27:20,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:27:20,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 23:27:20,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091408834] [2022-03-18 23:27:20,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:27:20,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 23:27:20,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:27:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 23:27:20,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:27:20,285 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:27:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:27:20,336 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-03-18 23:27:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 23:27:20,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 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 19 [2022-03-18 23:27:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:27:20,338 INFO L225 Difference]: With dead ends: 37 [2022-03-18 23:27:20,338 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 23:27:20,338 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-18 23:27:20,339 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:27:20,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:27:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 23:27:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-18 23:27:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 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) [2022-03-18 23:27:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-18 23:27:20,345 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2022-03-18 23:27:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:27:20,345 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-18 23:27:20,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:27:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-18 23:27:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 23:27:20,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:27:20,346 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:27:20,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 23:27:20,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:27:20,565 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:27:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:27:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash -554838191, now seen corresponding path program 1 times [2022-03-18 23:27:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:27:20,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114320744] [2022-03-18 23:27:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:20,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:27:20,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:27:20,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463810457] [2022-03-18 23:27:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:20,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:27:20,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:27:20,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:27:20,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 23:27:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:27:20,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 23:27:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:27:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:27:20,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:27:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:27:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:27:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114320744] [2022-03-18 23:27:21,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:27:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463810457] [2022-03-18 23:27:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463810457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:27:21,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:27:21,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-18 23:27:21,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315183901] [2022-03-18 23:27:21,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:27:21,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 23:27:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:27:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 23:27:21,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-18 23:27:21,014 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 23:27:23,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:27:25,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:27:28,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:27:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:27:29,167 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-03-18 23:27:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 23:27:29,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2022-03-18 23:27:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:27:29,169 INFO L225 Difference]: With dead ends: 63 [2022-03-18 23:27:29,169 INFO L226 Difference]: Without dead ends: 58 [2022-03-18 23:27:29,169 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-18 23:27:29,170 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:27:29,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 172 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2022-03-18 23:27:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-18 23:27:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2022-03-18 23:27:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 23:27:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-03-18 23:27:29,178 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 21 [2022-03-18 23:27:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:27:29,178 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-03-18 23:27:29,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 23:27:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-03-18 23:27:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 23:27:29,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:27:29,179 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:27:29,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 23:27:29,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 23:27:29,380 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:27:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:27:29,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1600606598, now seen corresponding path program 1 times [2022-03-18 23:27:29,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:27:29,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119929219] [2022-03-18 23:27:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:29,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:27:29,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:27:29,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133574162] [2022-03-18 23:27:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:29,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:27:29,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:27:29,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:27:29,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 23:27:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:27:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 23:27:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:27:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:27:29,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:27:29,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:27:29,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119929219] [2022-03-18 23:27:29,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:27:29,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133574162] [2022-03-18 23:27:29,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133574162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:27:29,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:27:29,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 23:27:29,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515984304] [2022-03-18 23:27:29,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:27:29,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 23:27:29,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:27:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 23:27:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:27:29,501 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 23:27:29,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:27:29,521 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-18 23:27:29,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 23:27:29,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-18 23:27:29,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:27:29,522 INFO L225 Difference]: With dead ends: 66 [2022-03-18 23:27:29,522 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 23:27:29,522 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:27:29,523 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 23:27:29,523 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 23:27:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 23:27:29,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-18 23:27:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 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) [2022-03-18 23:27:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-03-18 23:27:29,528 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 27 [2022-03-18 23:27:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:27:29,528 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-03-18 23:27:29,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 23:27:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-03-18 23:27:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 23:27:29,529 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:27:29,529 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:27:29,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 23:27:29,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:27:29,742 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:27:29,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:27:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1889469796, now seen corresponding path program 2 times [2022-03-18 23:27:29,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:27:29,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68373995] [2022-03-18 23:27:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:29,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:27:29,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:27:29,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891658423] [2022-03-18 23:27:29,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:27:29,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:27:29,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:27:29,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:27:29,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 23:27:29,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 23:27:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:27:29,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 23:27:29,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:27:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 23:27:29,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:27:29,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:27:29,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68373995] [2022-03-18 23:27:29,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:27:29,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891658423] [2022-03-18 23:27:29,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891658423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:27:29,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:27:29,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 23:27:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412649177] [2022-03-18 23:27:29,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:27:29,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 23:27:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:27:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 23:27:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 23:27:29,993 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:27:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:27:30,080 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-03-18 23:27:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 23:27:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-03-18 23:27:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:27:30,081 INFO L225 Difference]: With dead ends: 51 [2022-03-18 23:27:30,081 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 23:27:30,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 23:27:30,082 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:27:30,082 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 97 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 23:27:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 23:27:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2022-03-18 23:27:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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) [2022-03-18 23:27:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-03-18 23:27:30,087 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2022-03-18 23:27:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:27:30,087 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-03-18 23:27:30,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 23:27:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-03-18 23:27:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 23:27:30,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:27:30,088 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:27:30,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 23:27:30,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:27:30,288 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:27:30,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:27:30,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1664896543, now seen corresponding path program 1 times [2022-03-18 23:27:30,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:27:30,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528196503] [2022-03-18 23:27:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:30,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:27:30,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:27:30,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707074535] [2022-03-18 23:27:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:27:30,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:27:30,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:27:30,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:27:30,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 23:27:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:27:30,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 23:27:30,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:27:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:27:30,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:28:35,534 WARN L232 SmtUtils]: Spent 10.83s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:28:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 23:28:46,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:28:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528196503] [2022-03-18 23:28:46,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:28:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707074535] [2022-03-18 23:28:46,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707074535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:28:46,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:28:46,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-18 23:28:46,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398959366] [2022-03-18 23:28:46,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:28:46,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 23:28:46,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:28:46,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 23:28:46,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=172, Unknown=13, NotChecked=0, Total=240 [2022-03-18 23:28:46,519 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 23:28:48,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:28:50,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:28:52,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:28:55,001 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:29:34,665 WARN L232 SmtUtils]: Spent 24.08s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:29:37,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:29:39,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:29:41,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:29:48,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:29:54,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:29:56,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:30:25,845 WARN L232 SmtUtils]: Spent 24.20s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:30:27,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:30:30,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:30:32,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:30:39,358 WARN L232 SmtUtils]: Spent 6.73s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:30:41,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:30:43,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:30:45,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:30:47,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:30:50,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:30:52,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:10,995 WARN L232 SmtUtils]: Spent 13.94s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 23:31:12,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:15,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:17,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:19,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:31:21,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:31:24,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:26,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:28,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:30,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:33,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:35,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:31:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:31:35,514 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-03-18 23:31:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 23:31:35,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2022-03-18 23:31:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:31:35,516 INFO L225 Difference]: With dead ends: 96 [2022-03-18 23:31:35,516 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 23:31:35,517 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 144.3s TimeCoverageRelationStatistics Valid=116, Invalid=365, Unknown=25, NotChecked=0, Total=506 [2022-03-18 23:31:35,517 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 32 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.1s IncrementalHoareTripleChecker+Time [2022-03-18 23:31:35,517 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 199 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 161 Invalid, 30 Unknown, 0 Unchecked, 66.1s Time] [2022-03-18 23:31:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 23:31:35,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2022-03-18 23:31:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 49 states have internal predecessors, (55), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 23:31:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-18 23:31:35,526 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 29 [2022-03-18 23:31:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:31:35,526 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-18 23:31:35,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 23:31:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-18 23:31:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 23:31:35,528 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:31:35,528 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:31:35,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 23:31:35,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:31:35,748 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:31:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:31:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1142360470, now seen corresponding path program 2 times [2022-03-18 23:31:35,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:31:35,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694575314] [2022-03-18 23:31:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:31:35,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:31:35,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:31:35,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144429440] [2022-03-18 23:31:35,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 23:31:35,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:31:35,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:31:35,775 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:31:35,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 23:31:35,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 23:31:35,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 23:31:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 23:31:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:31:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 23:31:36,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 23:31:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 23:31:36,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:31:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694575314] [2022-03-18 23:31:36,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:31:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144429440] [2022-03-18 23:31:36,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144429440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 23:31:36,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 23:31:36,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-03-18 23:31:36,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761423230] [2022-03-18 23:31:36,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 23:31:36,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 23:31:36,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:31:36,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 23:31:36,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-18 23:31:36,292 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:31:38,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:31:40,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:31:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:31:41,255 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-03-18 23:31:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 23:31:41,255 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-03-18 23:31:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:31:41,256 INFO L225 Difference]: With dead ends: 88 [2022-03-18 23:31:41,256 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 23:31:41,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-18 23:31:41,257 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-18 23:31:41,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 251 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 97 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-03-18 23:31:41,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 23:31:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2022-03-18 23:31:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 23:31:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-03-18 23:31:41,265 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 35 [2022-03-18 23:31:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:31:41,265 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-03-18 23:31:41,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:31:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-03-18 23:31:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 23:31:41,266 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:31:41,266 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:31:41,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 23:31:41,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:31:41,470 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:31:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:31:41,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1815734547, now seen corresponding path program 3 times [2022-03-18 23:31:41,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:31:41,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872507085] [2022-03-18 23:31:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:31:41,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:31:41,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:31:41,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32197922] [2022-03-18 23:31:41,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 23:31:41,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:31:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:31:41,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:31:41,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process