/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 01:11:58,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 01:11:58,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 01:11:58,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 01:11:58,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 01:11:58,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 01:11:58,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 01:11:58,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 01:11:58,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 01:11:58,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 01:11:58,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 01:11:58,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 01:11:58,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 01:11:58,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 01:11:58,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 01:11:58,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 01:11:58,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 01:11:58,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 01:11:58,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 01:11:58,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 01:11:58,660 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 01:11:58,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 01:11:58,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 01:11:58,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 01:11:58,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 01:11:58,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 01:11:58,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 01:11:58,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 01:11:58,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 01:11:58,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 01:11:58,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 01:11:58,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 01:11:58,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 01:11:58,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 01:11:58,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 01:11:58,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 01:11:58,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 01:11:58,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 01:11:58,721 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 01:11:58,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 01:11:58,722 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 01:11:58,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 01:11:58,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 01:11:58,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 01:11:58,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 01:11:58,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 01:11:58,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 01:11:58,724 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 01:11:58,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 01:11:58,724 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 01:11:58,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 01:11:58,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 01:11:58,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 01:11:58,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 01:11:58,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:11:58,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 01:11:58,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 01:11:58,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 01:11:58,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 01:11:58,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 01:11:58,726 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 01:11:58,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 01:11:58,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 01:11:58,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 01:11:59,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 01:11:59,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 01:11:59,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 01:11:59,043 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 01:11:59,044 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 01:11:59,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2022-03-20 01:11:59,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f1377843/17e7de26afb44f97b78f36878dcbd0df/FLAG90108f3f7 [2022-03-20 01:11:59,577 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 01:11:59,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2022-03-20 01:11:59,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f1377843/17e7de26afb44f97b78f36878dcbd0df/FLAG90108f3f7 [2022-03-20 01:11:59,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f1377843/17e7de26afb44f97b78f36878dcbd0df [2022-03-20 01:11:59,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 01:11:59,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 01:11:59,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 01:11:59,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 01:11:59,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 01:11:59,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:11:59" (1/1) ... [2022-03-20 01:11:59,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3241f523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:11:59, skipping insertion in model container [2022-03-20 01:11:59,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:11:59" (1/1) ... [2022-03-20 01:11:59,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 01:11:59,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 01:12:00,131 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/hard-u_valuebound20.c[537,550] [2022-03-20 01:12:00,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:12:00,157 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 01:12:00,167 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/hard-u_valuebound20.c[537,550] [2022-03-20 01:12:00,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 01:12:00,186 INFO L208 MainTranslator]: Completed translation [2022-03-20 01:12:00,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00 WrapperNode [2022-03-20 01:12:00,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 01:12:00,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 01:12:00,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 01:12:00,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 01:12:00,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00" (1/1) ... [2022-03-20 01:12:00,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00" (1/1) ... [2022-03-20 01:12:00,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00" (1/1) ... [2022-03-20 01:12:00,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00" (1/1) ... [2022-03-20 01:12:00,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00" (1/1) ... [2022-03-20 01:12:00,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00" (1/1) ... [2022-03-20 01:12:00,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00" (1/1) ... [2022-03-20 01:12:00,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 01:12:00,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 01:12:00,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 01:12:00,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 01:12:00,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00" (1/1) ... [2022-03-20 01:12:00,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 01:12:00,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:12:00,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 01:12:00,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 01:12:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 01:12:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 01:12:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 01:12:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 01:12:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 01:12:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 01:12:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 01:12:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 01:12:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 01:12:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 01:12:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 01:12:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 01:12:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 01:12:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 01:12:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 01:12:00,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 01:12:00,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 01:12:00,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 01:12:00,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 01:12:00,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 01:12:00,341 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 01:12:00,343 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 01:12:00,508 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 01:12:00,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 01:12:00,514 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 01:12:00,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:12:00 BoogieIcfgContainer [2022-03-20 01:12:00,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 01:12:00,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 01:12:00,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 01:12:00,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 01:12:00,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:11:59" (1/3) ... [2022-03-20 01:12:00,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16015260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:12:00, skipping insertion in model container [2022-03-20 01:12:00,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:12:00" (2/3) ... [2022-03-20 01:12:00,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16015260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:12:00, skipping insertion in model container [2022-03-20 01:12:00,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:12:00" (3/3) ... [2022-03-20 01:12:00,528 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2022-03-20 01:12:00,533 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 01:12:00,534 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 01:12:00,598 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 01:12:00,606 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 01:12:00,606 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 01:12:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 01:12:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 01:12:00,645 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:12:00,646 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:12:00,646 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:12:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:12:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-20 01:12:00,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:12:00,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367224272] [2022-03-20 01:12:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:00,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:12:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:00,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:12:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:00,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 01:12:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:00,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 01:12:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:00,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 01:12:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:12:00,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:12:00,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367224272] [2022-03-20 01:12:00,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367224272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:12:00,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:12:00,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 01:12:00,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658747472] [2022-03-20 01:12:00,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:12:00,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 01:12:00,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:12:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 01:12:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 01:12:01,005 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:12:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:12:01,154 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-20 01:12:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 01:12:01,157 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 01:12:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:12:01,163 INFO L225 Difference]: With dead ends: 69 [2022-03-20 01:12:01,164 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 01:12:01,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 01:12:01,176 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:12:01,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:12:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 01:12:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 01:12:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 01:12:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 01:12:01,233 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 01:12:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:12:01,233 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 01:12:01,233 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 01:12:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 01:12:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 01:12:01,236 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:12:01,236 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:12:01,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 01:12:01,238 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:12:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:12:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-20 01:12:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:12:01,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482071417] [2022-03-20 01:12:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:01,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:12:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:12:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 01:12:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 01:12:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 01:12:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:12:01,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:12:01,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482071417] [2022-03-20 01:12:01,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482071417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:12:01,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:12:01,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 01:12:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823067473] [2022-03-20 01:12:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:12:01,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 01:12:01,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:12:01,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 01:12:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:12:01,454 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 01:12:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:12:01,702 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 01:12:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 01:12:01,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 01:12:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:12:01,710 INFO L225 Difference]: With dead ends: 46 [2022-03-20 01:12:01,715 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 01:12:01,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:12:01,720 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 01:12:01,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 01:12:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 01:12:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 01:12:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 01:12:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 01:12:01,754 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 01:12:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:12:01,754 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 01:12:01,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 01:12:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 01:12:01,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 01:12:01,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:12:01,756 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:12:01,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 01:12:01,756 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:12:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:12:01,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-20 01:12:01,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:12:01,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081567053] [2022-03-20 01:12:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:01,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:12:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 01:12:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 01:12:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 01:12:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 01:12:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 01:12:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 01:12:01,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:12:01,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081567053] [2022-03-20 01:12:01,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081567053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:12:01,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:12:01,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 01:12:01,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673346743] [2022-03-20 01:12:01,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:12:01,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 01:12:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:12:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 01:12:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:12:01,964 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 01:12:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:12:02,168 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 01:12:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 01:12:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 01:12:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:12:02,172 INFO L225 Difference]: With dead ends: 50 [2022-03-20 01:12:02,172 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 01:12:02,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 01:12:02,180 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:12:02,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:12:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 01:12:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 01:12:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 01:12:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 01:12:02,203 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 01:12:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:12:02,204 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 01:12:02,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 01:12:02,205 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 01:12:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 01:12:02,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:12:02,207 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:12:02,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 01:12:02,208 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:12:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:12:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-20 01:12:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:12:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463898915] [2022-03-20 01:12:02,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:02,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:12:02,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:12:02,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685161488] [2022-03-20 01:12:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:02,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:12:02,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:12:02,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:12:02,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 01:12:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 01:12:02,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:12:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 01:12:02,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:12:02,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:12:02,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463898915] [2022-03-20 01:12:02,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:12:02,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685161488] [2022-03-20 01:12:02,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685161488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:12:02,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:12:02,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 01:12:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82339481] [2022-03-20 01:12:02,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:12:02,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:12:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:12:02,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:12:02,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:12:02,464 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 01:12:04,509 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 [] [2022-03-20 01:12:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:12:04,687 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-03-20 01:12:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:12:04,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 01:12:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:12:04,689 INFO L225 Difference]: With dead ends: 58 [2022-03-20 01:12:04,689 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 01:12:04,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 01:12:04,690 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 01:12:04,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 01:12:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 01:12:04,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 01:12:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 01:12:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-03-20 01:12:04,699 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-03-20 01:12:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:12:04,700 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-03-20 01:12:04,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 01:12:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-03-20 01:12:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 01:12:04,701 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:12:04,702 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:12:04,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 01:12:04,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:12:04,916 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:12:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:12:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-20 01:12:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:12:04,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845566442] [2022-03-20 01:12:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:12:04,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:12:04,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590410948] [2022-03-20 01:12:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:04,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:12:04,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:12:04,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:12:04,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 01:12:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:04,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 01:12:04,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:12:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 01:12:05,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:12:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 01:12:05,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:12:05,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845566442] [2022-03-20 01:12:05,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:12:05,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590410948] [2022-03-20 01:12:05,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590410948] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 01:12:05,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 01:12:05,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 01:12:05,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215711695] [2022-03-20 01:12:05,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:12:05,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 01:12:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:12:05,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 01:12:05,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:12:05,759 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 01:12:07,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:12:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:12:08,012 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-03-20 01:12:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:12:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-20 01:12:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:12:08,014 INFO L225 Difference]: With dead ends: 68 [2022-03-20 01:12:08,014 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 01:12:08,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 01:12:08,015 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 01:12:08,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 146 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 01:12:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 01:12:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 01:12:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 01:12:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-03-20 01:12:08,030 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-03-20 01:12:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:12:08,031 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-03-20 01:12:08,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 01:12:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-03-20 01:12:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 01:12:08,041 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:12:08,042 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1] [2022-03-20 01:12:08,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 01:12:08,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:12:08,256 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:12:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:12:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-20 01:12:08,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:12:08,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096655440] [2022-03-20 01:12:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:12:08,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:12:08,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29561534] [2022-03-20 01:12:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:08,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:12:08,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:12:08,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:12:08,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 01:12:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 01:12:08,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:12:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 01:12:09,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:12:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 01:12:09,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:12:09,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096655440] [2022-03-20 01:12:09,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:12:09,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29561534] [2022-03-20 01:12:09,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29561534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:12:09,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:12:09,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-20 01:12:09,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178556000] [2022-03-20 01:12:09,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:12:09,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 01:12:09,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:12:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 01:12:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-20 01:12:09,682 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 01:12:12,543 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 [] [2022-03-20 01:12:15,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 01:12:17,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:12:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:12:18,303 INFO L93 Difference]: Finished difference Result 95 states and 122 transitions. [2022-03-20 01:12:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 01:12:18,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 55 [2022-03-20 01:12:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:12:18,305 INFO L225 Difference]: With dead ends: 95 [2022-03-20 01:12:18,305 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 01:12:18,306 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-20 01:12:18,306 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 57 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-03-20 01:12:18,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 276 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 347 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2022-03-20 01:12:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 01:12:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-03-20 01:12:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 50 states have internal predecessors, (56), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 01:12:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-03-20 01:12:18,322 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 55 [2022-03-20 01:12:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:12:18,322 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-03-20 01:12:18,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 01:12:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-03-20 01:12:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 01:12:18,323 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:12:18,324 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:12:18,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 01:12:18,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:12:18,530 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:12:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:12:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-20 01:12:18,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:12:18,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063300772] [2022-03-20 01:12:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:18,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:12:18,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:12:18,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643894156] [2022-03-20 01:12:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:18,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:12:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:12:18,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:12:18,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 01:12:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:12:18,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 01:12:18,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:12:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 01:12:18,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:12:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 01:12:19,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:12:19,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063300772] [2022-03-20 01:12:19,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:12:19,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643894156] [2022-03-20 01:12:19,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643894156] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 01:12:19,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 01:12:19,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 01:12:19,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925594284] [2022-03-20 01:12:19,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:12:19,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 01:12:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:12:19,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 01:12:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:12:19,575 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 01:12:22,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:12:24,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:12:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:12:25,136 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2022-03-20 01:12:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:12:25,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-20 01:12:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:12:25,139 INFO L225 Difference]: With dead ends: 90 [2022-03-20 01:12:25,139 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 01:12:25,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-20 01:12:25,140 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-03-20 01:12:25,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 162 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-03-20 01:12:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 01:12:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-20 01:12:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 01:12:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-03-20 01:12:25,158 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 56 [2022-03-20 01:12:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:12:25,158 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-03-20 01:12:25,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 01:12:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-03-20 01:12:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 01:12:25,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:12:25,159 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:12:25,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 01:12:25,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:12:25,360 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:12:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:12:25,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2022-03-20 01:12:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:12:25,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936018593] [2022-03-20 01:12:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:25,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:12:25,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:12:25,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778849698] [2022-03-20 01:12:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:12:25,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:12:25,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:12:25,378 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:12:25,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process