/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/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 07:49:38,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 07:49:38,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 07:49:38,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 07:49:38,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 07:49:38,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 07:49:38,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 07:49:38,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 07:49:38,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 07:49:38,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 07:49:38,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 07:49:38,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 07:49:38,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 07:49:38,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 07:49:38,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 07:49:38,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 07:49:38,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 07:49:38,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 07:49:38,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 07:49:38,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 07:49:38,078 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 07:49:38,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 07:49:38,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 07:49:38,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 07:49:38,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 07:49:38,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 07:49:38,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 07:49:38,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 07:49:38,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 07:49:38,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 07:49:38,104 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 07:49:38,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 07:49:38,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 07:49:38,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 07:49:38,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 07:49:38,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 07:49:38,106 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 07:49:38,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 07:49:38,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 07:49:38,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 07:49:38,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 07:49:38,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 07:49:38,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 07:49:38,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 07:49:38,107 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 07:49:38,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 07:49:38,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 07:49:38,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 07:49:38,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 07:49:38,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:49:38,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 07:49:38,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 07:49:38,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 07:49:38,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 07:49:38,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 07:49:38,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 07:49:38,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 07:49:38,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 07:49:38,108 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 07:49:38,108 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 07:49:38,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 07:49:38,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 07:49:38,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 07:49:38,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 07:49:38,289 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 07:49:38,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-04-05 07:49:38,337 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a779ce75/a55c12e2e1994ffe8928820e31f52217/FLAG685110585 [2022-04-05 07:49:38,633 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 07:49:38,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-04-05 07:49:38,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a779ce75/a55c12e2e1994ffe8928820e31f52217/FLAG685110585 [2022-04-05 07:49:39,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a779ce75/a55c12e2e1994ffe8928820e31f52217 [2022-04-05 07:49:39,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 07:49:39,078 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 07:49:39,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 07:49:39,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 07:49:39,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 07:49:39,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141131b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39, skipping insertion in model container [2022-04-05 07:49:39,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 07:49:39,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 07:49:39,200 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/egcd3-ll_valuebound50.c[490,503] [2022-04-05 07:49:39,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:49:39,225 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 07:49:39,232 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/egcd3-ll_valuebound50.c[490,503] [2022-04-05 07:49:39,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 07:49:39,244 INFO L208 MainTranslator]: Completed translation [2022-04-05 07:49:39,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39 WrapperNode [2022-04-05 07:49:39,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 07:49:39,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 07:49:39,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 07:49:39,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 07:49:39,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 07:49:39,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 07:49:39,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 07:49:39,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 07:49:39,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 07:49:39,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:39,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 07:49:39,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 07:49:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 07:49:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 07:49:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 07:49:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 07:49:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 07:49:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 07:49:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 07:49:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 07:49:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 07:49:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 07:49:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 07:49:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 07:49:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 07:49:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 07:49:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 07:49:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 07:49:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 07:49:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 07:49:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 07:49:39,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 07:49:39,376 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 07:49:39,377 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 07:49:39,505 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 07:49:39,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 07:49:39,508 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 07:49:39,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:49:39 BoogieIcfgContainer [2022-04-05 07:49:39,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 07:49:39,510 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 07:49:39,510 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 07:49:39,523 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 07:49:39,526 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:49:39" (1/1) ... [2022-04-05 07:49:39,527 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 07:49:39,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:49:39 BasicIcfg [2022-04-05 07:49:39,542 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 07:49:39,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 07:49:39,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 07:49:39,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 07:49:39,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 07:49:39" (1/4) ... [2022-04-05 07:49:39,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6daae0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:49:39, skipping insertion in model container [2022-04-05 07:49:39,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 07:49:39" (2/4) ... [2022-04-05 07:49:39,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6daae0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 07:49:39, skipping insertion in model container [2022-04-05 07:49:39,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 07:49:39" (3/4) ... [2022-04-05 07:49:39,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6daae0d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:49:39, skipping insertion in model container [2022-04-05 07:49:39,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 07:49:39" (4/4) ... [2022-04-05 07:49:39,553 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.cqvasr [2022-04-05 07:49:39,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 07:49:39,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 07:49:39,584 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 07:49:39,588 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 07:49:39,588 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 07:49:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 07:49:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 07:49:39,604 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:39,604 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:39,605 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:39,610 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-04-05 07:49:39,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:39,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710009525] [2022-04-05 07:49:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:39,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:39,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 07:49:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:39,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 07:49:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:39,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 07:49:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:39,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 07:49:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:39,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 07:49:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 07:49:39,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:39,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710009525] [2022-04-05 07:49:39,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710009525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:49:39,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:49:39,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 07:49:39,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481320490] [2022-04-05 07:49:39,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:49:39,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 07:49:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:39,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 07:49:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:49:39,811 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:49:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:39,858 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-04-05 07:49:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 07:49:39,860 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-05 07:49:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:39,865 INFO L225 Difference]: With dead ends: 73 [2022-04-05 07:49:39,865 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 07:49:39,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 07:49:39,869 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:39,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:49:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 07:49:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 07:49:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 07:49:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-05 07:49:39,897 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-04-05 07:49:39,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:39,898 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-05 07:49:39,898 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:49:39,898 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-05 07:49:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 07:49:39,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:39,899 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:39,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 07:49:39,900 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-04-05 07:49:39,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442446084] [2022-04-05 07:49:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:39,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:39,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:39,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487855755] [2022-04-05 07:49:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:39,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:39,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:39,916 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:39,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 07:49:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:39,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:49:39,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 07:49:40,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:49:40,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:40,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442446084] [2022-04-05 07:49:40,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:40,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487855755] [2022-04-05 07:49:40,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487855755] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:49:40,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:49:40,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 07:49:40,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922222499] [2022-04-05 07:49:40,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:49:40,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 07:49:40,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:40,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 07:49:40,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:49:40,116 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:49:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:40,206 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-04-05 07:49:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:49:40,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-05 07:49:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:40,209 INFO L225 Difference]: With dead ends: 54 [2022-04-05 07:49:40,209 INFO L226 Difference]: Without dead ends: 47 [2022-04-05 07:49:40,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:49:40,210 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:40,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:49:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-05 07:49:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-04-05 07:49:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 07:49:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-05 07:49:40,224 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-04-05 07:49:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:40,224 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-05 07:49:40,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:49:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-05 07:49:40,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 07:49:40,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:40,225 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-05 07:49:40,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:40,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:40,436 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-04-05 07:49:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:40,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257987784] [2022-04-05 07:49:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:40,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:40,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:40,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980451455] [2022-04-05 07:49:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:40,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:40,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:40,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 07:49:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 07:49:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:49:40,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:49:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 07:49:40,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:40,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257987784] [2022-04-05 07:49:40,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:40,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980451455] [2022-04-05 07:49:40,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980451455] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:49:40,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:49:40,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-05 07:49:40,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598176542] [2022-04-05 07:49:40,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:49:40,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:49:40,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:40,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:49:40,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-05 07:49:40,801 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:49:40,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:40,846 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-04-05 07:49:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:49:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-04-05 07:49:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:40,847 INFO L225 Difference]: With dead ends: 53 [2022-04-05 07:49:40,847 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 07:49:40,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-05 07:49:40,848 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:40,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 150 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:49:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 07:49:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-05 07:49:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 07:49:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-05 07:49:40,855 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-04-05 07:49:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:40,856 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-05 07:49:40,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:49:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-05 07:49:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 07:49:40,857 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:40,857 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:40,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:41,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 07:49:41,073 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-04-05 07:49:41,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:41,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658351820] [2022-04-05 07:49:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:41,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:41,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:41,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169988632] [2022-04-05 07:49:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:41,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:41,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:41,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:41,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 07:49:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:41,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 07:49:41,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 07:49:41,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:49:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 07:49:41,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658351820] [2022-04-05 07:49:41,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169988632] [2022-04-05 07:49:41,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169988632] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:49:41,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:49:41,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 07:49:41,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297735703] [2022-04-05 07:49:41,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:49:41,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 07:49:41,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 07:49:41,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 07:49:41,330 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:49:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:41,472 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-04-05 07:49:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 07:49:41,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-05 07:49:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:41,476 INFO L225 Difference]: With dead ends: 103 [2022-04-05 07:49:41,476 INFO L226 Difference]: Without dead ends: 96 [2022-04-05 07:49:41,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:49:41,477 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:41,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 238 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:49:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-05 07:49:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-04-05 07:49:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 07:49:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-04-05 07:49:41,489 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-04-05 07:49:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:41,489 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-04-05 07:49:41,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 07:49:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-04-05 07:49:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 07:49:41,490 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:41,490 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-05 07:49:41,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:41,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:41,690 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-04-05 07:49:41,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:41,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413792002] [2022-04-05 07:49:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:41,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:41,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:41,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129374661] [2022-04-05 07:49:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:41,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:41,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:41,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 07:49:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 07:49:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:49:42,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:49:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 07:49:42,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:42,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413792002] [2022-04-05 07:49:42,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:42,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129374661] [2022-04-05 07:49:42,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129374661] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:49:42,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:49:42,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-04-05 07:49:42,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492969232] [2022-04-05 07:49:42,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:49:42,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 07:49:42,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 07:49:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-05 07:49:42,142 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-04-05 07:49:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:42,201 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-04-05 07:49:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 07:49:42,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 42 [2022-04-05 07:49:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:42,202 INFO L225 Difference]: With dead ends: 79 [2022-04-05 07:49:42,202 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 07:49:42,202 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-05 07:49:42,203 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:42,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 169 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:49:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 07:49:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-05 07:49:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 07:49:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-04-05 07:49:42,211 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-04-05 07:49:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:42,211 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-04-05 07:49:42,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-04-05 07:49:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-04-05 07:49:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 07:49:42,212 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:42,212 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:42,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:42,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:42,420 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-04-05 07:49:42,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:42,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598921544] [2022-04-05 07:49:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:42,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:42,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:42,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804921334] [2022-04-05 07:49:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:42,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:42,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:42,430 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:42,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 07:49:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:42,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-05 07:49:42,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 07:49:42,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:49:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 07:49:42,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:42,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598921544] [2022-04-05 07:49:42,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:42,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804921334] [2022-04-05 07:49:42,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804921334] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:49:42,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:49:42,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-04-05 07:49:42,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413552329] [2022-04-05 07:49:42,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:49:42,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 07:49:42,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 07:49:42,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-05 07:49:42,874 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 07:49:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:43,240 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-04-05 07:49:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 07:49:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-04-05 07:49:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:43,241 INFO L225 Difference]: With dead ends: 118 [2022-04-05 07:49:43,241 INFO L226 Difference]: Without dead ends: 116 [2022-04-05 07:49:43,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-04-05 07:49:43,242 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:43,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 255 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 07:49:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-05 07:49:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-04-05 07:49:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 07:49:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-04-05 07:49:43,262 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-04-05 07:49:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:43,264 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-04-05 07:49:43,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 07:49:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-04-05 07:49:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 07:49:43,270 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:43,271 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-05 07:49:43,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:43,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:43,471 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:43,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-04-05 07:49:43,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:43,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117531901] [2022-04-05 07:49:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:43,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:43,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:43,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551431019] [2022-04-05 07:49:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:43,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:43,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:43,481 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:43,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 07:49:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:43,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:49:43,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 07:49:43,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:49:43,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:43,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117531901] [2022-04-05 07:49:43,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:43,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551431019] [2022-04-05 07:49:43,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551431019] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:49:43,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:49:43,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:49:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601282680] [2022-04-05 07:49:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:49:43,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:49:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:49:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:49:43,572 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 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) [2022-04-05 07:49:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:43,611 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-04-05 07:49:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:49:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 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 47 [2022-04-05 07:49:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:43,613 INFO L225 Difference]: With dead ends: 151 [2022-04-05 07:49:43,613 INFO L226 Difference]: Without dead ends: 149 [2022-04-05 07:49:43,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:49:43,614 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:43,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:49:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-05 07:49:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-04-05 07:49:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-05 07:49:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-04-05 07:49:43,646 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-04-05 07:49:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:43,647 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-04-05 07:49:43,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 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) [2022-04-05 07:49:43,647 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-04-05 07:49:43,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 07:49:43,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:43,647 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:43,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:43,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:43,864 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-04-05 07:49:43,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701229001] [2022-04-05 07:49:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:43,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:43,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:43,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802096638] [2022-04-05 07:49:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:43,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:43,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:43,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:43,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 07:49:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:43,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 07:49:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 07:49:44,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:49:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 07:49:44,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:44,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701229001] [2022-04-05 07:49:44,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:44,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802096638] [2022-04-05 07:49:44,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802096638] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:49:44,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:49:44,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-04-05 07:49:44,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962798067] [2022-04-05 07:49:44,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:49:44,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 07:49:44,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 07:49:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-04-05 07:49:44,343 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-05 07:49:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:45,322 INFO L93 Difference]: Finished difference Result 194 states and 277 transitions. [2022-04-05 07:49:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-05 07:49:45,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-04-05 07:49:45,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:45,325 INFO L225 Difference]: With dead ends: 194 [2022-04-05 07:49:45,325 INFO L226 Difference]: Without dead ends: 192 [2022-04-05 07:49:45,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-04-05 07:49:45,326 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:45,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 279 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 432 Invalid, 0 Unknown, 84 Unchecked, 0.5s Time] [2022-04-05 07:49:45,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-05 07:49:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 166. [2022-04-05 07:49:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 104 states have (on average 1.2692307692307692) internal successors, (132), 108 states have internal predecessors, (132), 53 states have call successors, (53), 9 states have call predecessors, (53), 8 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-05 07:49:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 236 transitions. [2022-04-05 07:49:45,350 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 236 transitions. Word has length 47 [2022-04-05 07:49:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:45,351 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 236 transitions. [2022-04-05 07:49:45,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-05 07:49:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 236 transitions. [2022-04-05 07:49:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 07:49:45,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:45,354 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-05 07:49:45,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:45,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:45,572 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-04-05 07:49:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:45,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207532484] [2022-04-05 07:49:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:45,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:45,579 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:45,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723198978] [2022-04-05 07:49:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:49:45,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:45,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:45,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 07:49:45,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:49:45,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:49:45,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 07:49:45,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 07:49:45,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:49:45,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:45,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207532484] [2022-04-05 07:49:45,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:45,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723198978] [2022-04-05 07:49:45,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723198978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:49:45,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:49:45,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:49:45,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834691026] [2022-04-05 07:49:45,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:49:45,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:49:45,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:45,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:49:45,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:49:45,675 INFO L87 Difference]: Start difference. First operand 166 states and 236 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:49:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:45,748 INFO L93 Difference]: Finished difference Result 212 states and 296 transitions. [2022-04-05 07:49:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:49:45,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-04-05 07:49:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:45,750 INFO L225 Difference]: With dead ends: 212 [2022-04-05 07:49:45,750 INFO L226 Difference]: Without dead ends: 136 [2022-04-05 07:49:45,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 07:49:45,754 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:45,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 155 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 07:49:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-05 07:49:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2022-04-05 07:49:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 72 states have internal predecessors, (82), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-05 07:49:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2022-04-05 07:49:45,779 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 47 [2022-04-05 07:49:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:45,779 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2022-04-05 07:49:45,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 07:49:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2022-04-05 07:49:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 07:49:45,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:45,780 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-04-05 07:49:45,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:45,988 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 07:49:45,989 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:45,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-04-05 07:49:45,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:45,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945569043] [2022-04-05 07:49:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:45,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:45,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:45,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703844206] [2022-04-05 07:49:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:45,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:45,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:45,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:45,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 07:49:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 07:49:46,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 07:49:46,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:49:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945569043] [2022-04-05 07:49:46,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703844206] [2022-04-05 07:49:46,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703844206] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:49:46,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:49:46,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:49:46,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777288918] [2022-04-05 07:49:46,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:49:46,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:49:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:49:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:49:46,105 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 07:49:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:46,155 INFO L93 Difference]: Finished difference Result 163 states and 230 transitions. [2022-04-05 07:49:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:49:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-04-05 07:49:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:46,156 INFO L225 Difference]: With dead ends: 163 [2022-04-05 07:49:46,156 INFO L226 Difference]: Without dead ends: 161 [2022-04-05 07:49:46,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:49:46,157 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:46,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:49:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-05 07:49:46,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2022-04-05 07:49:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 85 states have internal predecessors, (90), 57 states have call successors, (57), 10 states have call predecessors, (57), 9 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-05 07:49:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 202 transitions. [2022-04-05 07:49:46,176 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 202 transitions. Word has length 52 [2022-04-05 07:49:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:46,176 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 202 transitions. [2022-04-05 07:49:46,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 07:49:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 202 transitions. [2022-04-05 07:49:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 07:49:46,177 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:46,177 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:46,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:46,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 07:49:46,393 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-04-05 07:49:46,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:46,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146713035] [2022-04-05 07:49:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:46,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:46,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:46,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400957413] [2022-04-05 07:49:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:46,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:46,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:46,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:46,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 07:49:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:46,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-05 07:49:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-05 07:49:46,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:49:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-05 07:49:47,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:47,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146713035] [2022-04-05 07:49:47,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:47,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400957413] [2022-04-05 07:49:47,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400957413] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:49:47,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:49:47,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-05 07:49:47,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932185225] [2022-04-05 07:49:47,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:49:47,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 07:49:47,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 07:49:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-05 07:49:47,142 INFO L87 Difference]: Start difference. First operand 144 states and 202 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 07:49:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:51,078 INFO L93 Difference]: Finished difference Result 331 states and 487 transitions. [2022-04-05 07:49:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-05 07:49:51,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-04-05 07:49:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:51,080 INFO L225 Difference]: With dead ends: 331 [2022-04-05 07:49:51,080 INFO L226 Difference]: Without dead ends: 326 [2022-04-05 07:49:51,081 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 07:49:51,082 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 148 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:51,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 373 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-05 07:49:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-04-05 07:49:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-04-05 07:49:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-05 07:49:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 351 transitions. [2022-04-05 07:49:51,136 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 351 transitions. Word has length 64 [2022-04-05 07:49:51,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:51,136 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 351 transitions. [2022-04-05 07:49:51,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 07:49:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 351 transitions. [2022-04-05 07:49:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-05 07:49:51,137 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:51,137 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:51,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:51,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 07:49:51,346 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-04-05 07:49:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:51,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934602366] [2022-04-05 07:49:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:51,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:51,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991535499] [2022-04-05 07:49:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:51,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:51,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:51,360 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:51,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 07:49:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 07:49:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-05 07:49:51,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:49:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-05 07:49:51,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934602366] [2022-04-05 07:49:51,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991535499] [2022-04-05 07:49:51,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991535499] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 07:49:51,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 07:49:51,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-05 07:49:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298712866] [2022-04-05 07:49:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:49:51,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:49:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:49:51,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-05 07:49:51,629 INFO L87 Difference]: Start difference. First operand 250 states and 351 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-05 07:49:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:51,716 INFO L93 Difference]: Finished difference Result 256 states and 356 transitions. [2022-04-05 07:49:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 07:49:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-04-05 07:49:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:51,720 INFO L225 Difference]: With dead ends: 256 [2022-04-05 07:49:51,720 INFO L226 Difference]: Without dead ends: 254 [2022-04-05 07:49:51,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 07:49:51,720 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:51,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:49:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-05 07:49:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-04-05 07:49:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-05 07:49:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2022-04-05 07:49:51,769 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 74 [2022-04-05 07:49:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:51,769 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2022-04-05 07:49:51,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-05 07:49:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2022-04-05 07:49:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-05 07:49:51,770 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:51,770 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:51,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:51,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 07:49:51,979 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:51,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-04-05 07:49:51,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:51,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657459782] [2022-04-05 07:49:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:51,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:51,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:51,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505659270] [2022-04-05 07:49:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:51,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:51,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:51,990 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:51,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 07:49:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:49:52,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 07:49:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-05 07:49:52,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:49:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-05 07:49:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:52,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657459782] [2022-04-05 07:49:52,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:52,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505659270] [2022-04-05 07:49:52,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505659270] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:49:52,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:49:52,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-05 07:49:52,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613321874] [2022-04-05 07:49:52,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:49:52,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 07:49:52,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:52,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 07:49:52,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-05 07:49:52,432 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 07:49:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:52,880 INFO L93 Difference]: Finished difference Result 323 states and 461 transitions. [2022-04-05 07:49:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 07:49:52,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-04-05 07:49:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:52,882 INFO L225 Difference]: With dead ends: 323 [2022-04-05 07:49:52,882 INFO L226 Difference]: Without dead ends: 321 [2022-04-05 07:49:52,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-04-05 07:49:52,882 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 73 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:52,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 270 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 07:49:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-04-05 07:49:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 258. [2022-04-05 07:49:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 159 states have internal predecessors, (181), 89 states have call successors, (89), 17 states have call predecessors, (89), 16 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-04-05 07:49:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 357 transitions. [2022-04-05 07:49:52,947 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 357 transitions. Word has length 72 [2022-04-05 07:49:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:52,947 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 357 transitions. [2022-04-05 07:49:52,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 07:49:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 357 transitions. [2022-04-05 07:49:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 07:49:52,948 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:52,948 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:52,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:53,156 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 07:49:53,156 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-04-05 07:49:53,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:53,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541617207] [2022-04-05 07:49:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:53,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:53,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:53,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520585494] [2022-04-05 07:49:53,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 07:49:53,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:53,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:53,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:53,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 07:49:53,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 07:49:53,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:49:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 07:49:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 07:49:53,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 07:49:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:53,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541617207] [2022-04-05 07:49:53,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:53,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520585494] [2022-04-05 07:49:53,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520585494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 07:49:53,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 07:49:53,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 07:49:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550491032] [2022-04-05 07:49:53,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 07:49:53,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 07:49:53,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:53,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 07:49:53,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 07:49:53,304 INFO L87 Difference]: Start difference. First operand 258 states and 357 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-05 07:49:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:49:53,385 INFO L93 Difference]: Finished difference Result 444 states and 610 transitions. [2022-04-05 07:49:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 07:49:53,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-04-05 07:49:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:49:53,387 INFO L225 Difference]: With dead ends: 444 [2022-04-05 07:49:53,387 INFO L226 Difference]: Without dead ends: 266 [2022-04-05 07:49:53,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-05 07:49:53,388 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 07:49:53,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 109 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 07:49:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-04-05 07:49:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 257. [2022-04-05 07:49:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 161 states have internal predecessors, (187), 81 states have call successors, (81), 17 states have call predecessors, (81), 16 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-04-05 07:49:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 347 transitions. [2022-04-05 07:49:53,431 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 347 transitions. Word has length 77 [2022-04-05 07:49:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:49:53,431 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 347 transitions. [2022-04-05 07:49:53,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-05 07:49:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 347 transitions. [2022-04-05 07:49:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-05 07:49:53,431 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:49:53,432 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:49:53,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 07:49:53,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 07:49:53,635 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:49:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:49:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-04-05 07:49:53,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:49:53,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295335295] [2022-04-05 07:49:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:49:53,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:49:53,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:49:53,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095158336] [2022-04-05 07:49:53,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 07:49:53,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:49:53,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:49:53,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:49:53,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 07:49:53,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 07:49:53,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 07:49:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-05 07:49:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:49:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 07:49:54,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:49:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-05 07:49:55,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:49:55,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295335295] [2022-04-05 07:49:55,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:49:55,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095158336] [2022-04-05 07:49:55,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095158336] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:49:55,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:49:55,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-04-05 07:49:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340245982] [2022-04-05 07:49:55,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:49:55,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 07:49:55,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:49:55,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 07:49:55,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-04-05 07:49:55,417 INFO L87 Difference]: Start difference. First operand 257 states and 347 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-05 07:50:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:50:19,621 INFO L93 Difference]: Finished difference Result 424 states and 583 transitions. [2022-04-05 07:50:19,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-05 07:50:19,622 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 77 [2022-04-05 07:50:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:50:19,629 INFO L225 Difference]: With dead ends: 424 [2022-04-05 07:50:19,629 INFO L226 Difference]: Without dead ends: 422 [2022-04-05 07:50:19,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=692, Invalid=2387, Unknown=1, NotChecked=0, Total=3080 [2022-04-05 07:50:19,632 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 256 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-04-05 07:50:19,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 499 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-04-05 07:50:19,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-05 07:50:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 359. [2022-04-05 07:50:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 218 states have (on average 1.1926605504587156) internal successors, (260), 219 states have internal predecessors, (260), 119 states have call successors, (119), 22 states have call predecessors, (119), 21 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-04-05 07:50:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 496 transitions. [2022-04-05 07:50:19,705 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 496 transitions. Word has length 77 [2022-04-05 07:50:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:50:19,705 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 496 transitions. [2022-04-05 07:50:19,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-05 07:50:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 496 transitions. [2022-04-05 07:50:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-05 07:50:19,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:50:19,706 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:50:19,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 07:50:19,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:50:19,919 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:50:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:50:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-04-05 07:50:19,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:50:19,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196709568] [2022-04-05 07:50:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:50:19,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:50:19,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:50:19,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826898944] [2022-04-05 07:50:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:50:19,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:50:19,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:50:19,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:50:19,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 07:50:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:50:19,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-05 07:50:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:50:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-05 07:50:20,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:50:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 73 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-05 07:50:24,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:50:24,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196709568] [2022-04-05 07:50:24,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:50:24,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826898944] [2022-04-05 07:50:24,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826898944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:50:24,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:50:24,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-05 07:50:24,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545978064] [2022-04-05 07:50:24,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:50:24,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 07:50:24,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:50:24,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 07:50:24,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-04-05 07:50:24,203 INFO L87 Difference]: Start difference. First operand 359 states and 496 transitions. Second operand has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-05 07:50:34,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:50:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:50:35,330 INFO L93 Difference]: Finished difference Result 468 states and 639 transitions. [2022-04-05 07:50:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 07:50:35,331 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 91 [2022-04-05 07:50:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:50:35,333 INFO L225 Difference]: With dead ends: 468 [2022-04-05 07:50:35,333 INFO L226 Difference]: Without dead ends: 464 [2022-04-05 07:50:35,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=502, Invalid=2047, Unknown=1, NotChecked=0, Total=2550 [2022-04-05 07:50:35,334 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 341 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-04-05 07:50:35,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 398 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1384 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-04-05 07:50:35,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-04-05 07:50:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 370. [2022-04-05 07:50:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 213 states have (on average 1.192488262910798) internal successors, (254), 213 states have internal predecessors, (254), 130 states have call successors, (130), 27 states have call predecessors, (130), 26 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2022-04-05 07:50:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 513 transitions. [2022-04-05 07:50:35,431 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 513 transitions. Word has length 91 [2022-04-05 07:50:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:50:35,431 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 513 transitions. [2022-04-05 07:50:35,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-05 07:50:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 513 transitions. [2022-04-05 07:50:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-05 07:50:35,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:50:35,432 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:50:35,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 07:50:35,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 07:50:35,647 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:50:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:50:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-04-05 07:50:35,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:50:35,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717874185] [2022-04-05 07:50:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:50:35,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:50:35,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:50:35,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033277834] [2022-04-05 07:50:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:50:35,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:50:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:50:35,662 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:50:35,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 07:50:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:50:35,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 07:50:35,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:50:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-05 07:50:35,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:50:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-05 07:50:36,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:50:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717874185] [2022-04-05 07:50:36,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:50:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033277834] [2022-04-05 07:50:36,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033277834] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:50:36,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:50:36,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-05 07:50:36,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201761339] [2022-04-05 07:50:36,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:50:36,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 07:50:36,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:50:36,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 07:50:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-04-05 07:50:36,443 INFO L87 Difference]: Start difference. First operand 370 states and 513 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 07:50:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:50:38,202 INFO L93 Difference]: Finished difference Result 897 states and 1392 transitions. [2022-04-05 07:50:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-05 07:50:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-04-05 07:50:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:50:38,205 INFO L225 Difference]: With dead ends: 897 [2022-04-05 07:50:38,205 INFO L226 Difference]: Without dead ends: 895 [2022-04-05 07:50:38,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-04-05 07:50:38,206 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 88 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 07:50:38,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 425 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 07:50:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-04-05 07:50:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 823. [2022-04-05 07:50:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 395 states have (on average 1.3063291139240507) internal successors, (516), 395 states have internal predecessors, (516), 398 states have call successors, (398), 30 states have call predecessors, (398), 29 states have return successors, (397), 397 states have call predecessors, (397), 397 states have call successors, (397) [2022-04-05 07:50:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1311 transitions. [2022-04-05 07:50:38,565 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1311 transitions. Word has length 94 [2022-04-05 07:50:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:50:38,565 INFO L478 AbstractCegarLoop]: Abstraction has 823 states and 1311 transitions. [2022-04-05 07:50:38,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 07:50:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1311 transitions. [2022-04-05 07:50:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-05 07:50:38,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 07:50:38,566 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:50:38,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 07:50:38,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 07:50:38,776 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 07:50:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 07:50:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-04-05 07:50:38,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 07:50:38,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592641622] [2022-04-05 07:50:38,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:50:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 07:50:38,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 07:50:38,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020724072] [2022-04-05 07:50:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 07:50:38,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 07:50:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 07:50:38,783 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 07:50:38,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 07:50:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 07:50:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-05 07:50:38,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 07:50:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-05 07:50:39,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 07:50:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-05 07:50:39,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 07:50:39,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592641622] [2022-04-05 07:50:39,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 07:50:39,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020724072] [2022-04-05 07:50:39,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020724072] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 07:50:39,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 07:50:39,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-05 07:50:39,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298077186] [2022-04-05 07:50:39,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 07:50:39,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 07:50:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 07:50:39,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 07:50:39,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-04-05 07:50:39,916 INFO L87 Difference]: Start difference. First operand 823 states and 1311 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-05 07:50:47,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:50:49,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 07:50:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 07:50:54,000 INFO L93 Difference]: Finished difference Result 929 states and 1490 transitions. [2022-04-05 07:50:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 07:50:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) Word has length 94 [2022-04-05 07:50:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 07:50:54,001 INFO L225 Difference]: With dead ends: 929 [2022-04-05 07:50:54,001 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 07:50:54,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 165 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=230, Invalid=891, Unknown=1, NotChecked=0, Total=1122 [2022-04-05 07:50:54,004 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 86 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 217 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-04-05 07:50:54,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 313 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 732 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2022-04-05 07:50:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 07:50:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 07:50:54,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 07:50:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 07:50:54,005 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2022-04-05 07:50:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 07:50:54,005 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 07:50:54,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-05 07:50:54,006 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 07:50:54,006 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 07:50:54,008 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 07:50:54,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-05 07:50:54,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 07:50:54,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 07:51:00,057 WARN L232 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 464 DAG size of output: 472 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-05 07:51:05,615 WARN L232 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 468 DAG size of output: 468 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-05 07:51:15,818 WARN L232 SmtUtils]: Spent 10.20s on a formula simplification. DAG size of input: 409 DAG size of output: 404 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-05 07:51:21,097 WARN L232 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 469 DAG size of output: 471 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-05 07:51:28,351 WARN L232 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 485 DAG size of output: 476 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-05 07:51:35,654 WARN L232 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 485 DAG size of output: 476 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-05 07:51:50,186 WARN L232 SmtUtils]: Spent 12.76s on a formula simplification. DAG size of input: 165 DAG size of output: 54 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-05 07:52:44,356 WARN L232 SmtUtils]: Spent 54.17s on a formula simplification. DAG size of input: 392 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-05 07:54:00,788 WARN L232 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 388 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-05 07:54:13,151 WARN L232 SmtUtils]: Spent 12.36s on a formula simplification. DAG size of input: 333 DAG size of output: 65 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-05 07:54:57,958 WARN L232 SmtUtils]: Spent 44.80s on a formula simplification. DAG size of input: 391 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-05 07:55:37,032 WARN L232 SmtUtils]: Spent 39.07s on a formula simplification. DAG size of input: 401 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-05 07:56:29,057 WARN L232 SmtUtils]: Spent 52.02s on a formula simplification. DAG size of input: 401 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-05 07:56:29,060 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 07:56:29,061 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 07:56:29,061 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 07:56:29,061 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-04-05 07:56:29,061 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-04-05 07:56:29,061 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-04-05 07:56:29,061 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-04-05 07:56:29,061 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 50)) [2022-04-05 07:56:29,061 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 50)) [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-04-05 07:56:29,061 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse1 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~a~0 .cse1)) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (or (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (not (<= (* main_~b~0 3) main_~c~0)) (<= (* main_~b~0 4) main_~c~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 (or (= .cse1 (+ (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0))) (<= main_~b~0 main_~c~0)) .cse2 .cse3) (and (= main_~s~0 1) .cse0 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-05 07:56:29,061 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse0 (* main_~q~0 main_~x~0)) (.cse1 (* main_~y~0 main_~s~0))) (let ((.cse2 (= main_~b~0 (+ .cse0 .cse1)))) (and (< main_~b~0 main_~a~0) (<= 1 main_~x~0) (= (+ .cse0 main_~a~0 .cse1) (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (or .cse2 (= main_~b~0 0)) (or .cse2 (<= main_~b~0 main_~c~0)) (<= 1 main_~y~0) (<= main_~y~0 50)))) [2022-04-05 07:56:29,061 INFO L882 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2022-04-05 07:56:29,062 INFO L882 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2022-04-05 07:56:29,062 INFO L878 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse15 (* main_~y~0 main_~r~0)) (.cse16 (* main_~p~0 main_~x~0)) (.cse12 (* main_~q~0 main_~x~0)) (.cse11 (* main_~y~0 main_~s~0))) (let ((.cse17 (= main_~b~0 (+ .cse12 .cse11))) (.cse18 (<= 1 main_~x~0)) (.cse0 (= main_~k~0 0)) (.cse10 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~a~0 (+ .cse15 .cse16))) (.cse13 (* main_~k~0 main_~y~0 main_~s~0)) (.cse14 (* main_~q~0 main_~k~0 main_~x~0)) (.cse3 (<= 1 main_~a~0)) (.cse4 (= main_~b~0 main_~y~0)) (.cse5 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (= main_~a~0 main_~x~0)) (.cse8 (<= main_~y~0 50)) (.cse9 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (= main_~c~0 main_~x~0) .cse8 .cse9) (and (< main_~b~0 main_~a~0) .cse10 (= (+ (* 2 .cse11) (* .cse12 2) .cse13 main_~c~0 .cse14) (+ .cse15 .cse16 (* main_~b~0 2))) .cse17 .cse18 .cse2 .cse6 .cse8) (and (= main_~c~0 main_~a~0) .cse17 .cse18 .cse0 .cse2 (< main_~b~0 main_~c~0) .cse6 .cse8) (and .cse10 .cse1 .cse2 (= (+ (* main_~d~0 main_~y~0 main_~s~0) .cse13 main_~c~0 .cse14 (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse15 main_~v~0 .cse16)) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9)))) [2022-04-05 07:56:29,062 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2022-04-05 07:56:29,062 INFO L882 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2022-04-05 07:56:29,062 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2022-04-05 07:56:29,062 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2022-04-05 07:56:29,062 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-05 07:56:29,062 INFO L882 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2022-04-05 07:56:29,062 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-05 07:56:29,062 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-05 07:56:29,062 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-05 07:56:29,062 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-04-05 07:56:29,062 INFO L882 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2022-04-05 07:56:29,062 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-04-05 07:56:29,062 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-04-05 07:56:29,062 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-04-05 07:56:29,063 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-04-05 07:56:29,063 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-04-05 07:56:29,063 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-04-05 07:56:29,066 INFO L719 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 07:56:29,066 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 07:56:29,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 07:56:29 BasicIcfg [2022-04-05 07:56:29,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 07:56:29,085 INFO L158 Benchmark]: Toolchain (without parser) took 410006.67ms. Allocated memory was 191.9MB in the beginning and 399.5MB in the end (delta: 207.6MB). Free memory was 140.9MB in the beginning and 245.2MB in the end (delta: -104.3MB). Peak memory consumption was 218.9MB. Max. memory is 8.0GB. [2022-04-05 07:56:29,085 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory was 157.5MB in the beginning and 157.4MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 07:56:29,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.72ms. Allocated memory is still 191.9MB. Free memory was 140.7MB in the beginning and 167.9MB in the end (delta: -27.2MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. [2022-04-05 07:56:29,086 INFO L158 Benchmark]: Boogie Preprocessor took 17.23ms. Allocated memory is still 191.9MB. Free memory was 167.9MB in the beginning and 166.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 07:56:29,086 INFO L158 Benchmark]: RCFGBuilder took 246.74ms. Allocated memory is still 191.9MB. Free memory was 166.2MB in the beginning and 154.2MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 07:56:29,086 INFO L158 Benchmark]: IcfgTransformer took 32.07ms. Allocated memory is still 191.9MB. Free memory was 154.2MB in the beginning and 152.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 07:56:29,086 INFO L158 Benchmark]: TraceAbstraction took 409541.54ms. Allocated memory was 191.9MB in the beginning and 399.5MB in the end (delta: 207.6MB). Free memory was 152.1MB in the beginning and 245.2MB in the end (delta: -93.1MB). Peak memory consumption was 230.9MB. Max. memory is 8.0GB. [2022-04-05 07:56:29,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory was 157.5MB in the beginning and 157.4MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 165.72ms. Allocated memory is still 191.9MB. Free memory was 140.7MB in the beginning and 167.9MB in the end (delta: -27.2MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.23ms. Allocated memory is still 191.9MB. Free memory was 167.9MB in the beginning and 166.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 246.74ms. Allocated memory is still 191.9MB. Free memory was 166.2MB in the beginning and 154.2MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 32.07ms. Allocated memory is still 191.9MB. Free memory was 154.2MB in the beginning and 152.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 409541.54ms. Allocated memory was 191.9MB in the beginning and 399.5MB in the end (delta: 207.6MB). Free memory was 152.1MB in the beginning and 245.2MB in the end (delta: -93.1MB). Peak memory consumption was 230.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 409.5s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 57.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 334.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 1260 SdHoareTripleChecker+Valid, 30.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1196 mSDsluCounter, 4250 SdHoareTripleChecker+Invalid, 29.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 84 IncrementalHoareTripleChecker+Unchecked, 3331 mSDsCounter, 1739 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6452 IncrementalHoareTripleChecker+Invalid, 8277 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1739 mSolverCounterUnsat, 919 mSDtfsCounter, 6452 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1971 GetRequests, 1626 SyntacticMatches, 17 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 29.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=823occurred in iteration=17, InterpolantAutomatonStates: 252, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 18 MinimizatonAttempts, 498 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 565 PreInvPairs, 1178 NumberOfFragments, 1064 HoareAnnotationTreeSize, 565 FomulaSimplifications, 410418 FormulaSimplificationTreeSizeReduction, 41.4s HoareSimplificationTime, 18 FomulaSimplificationsInter, 765452 FormulaSimplificationTreeSizeReductionInter, 293.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 1063 NumberOfCodeBlocks, 1042 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1806 ConstructedInterpolants, 3 QuantifiedInterpolants, 9373 SizeOfPredicates, 99 NumberOfNonLiveVariables, 2865 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 2231/2489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((b < a && v == d * b) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= y) && y <= 50) || ((((((((((a == c + b * k && s == 1) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 50) && p == 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((b < a && ((a == c + b * k || !(b * 3 <= c)) || b * 4 <= c)) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && 1 <= y) && y <= 50) || ((((((((s == 1 && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 50) && p == 1) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((k == 0 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && c == x) && y <= 50) && p == 1) || (((((((b < a && v == d * b) && 2 * (y * s) + q * x * 2 + k * y * s + c + q * k * x == y * r + p * x + b * 2) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && 1 <= y) && y <= 50)) || (((((((c == a && b == q * x + y * s) && 1 <= x) && k == 0) && a == y * r + p * x) && b < c) && 1 <= y) && y <= 50)) || ((((((((((v == d * b && s == 1) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 50) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-04-05 07:56:29,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...