/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench/dijkstra-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 04:32:42,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 04:32:42,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 04:32:42,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 04:32:42,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 04:32:42,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 04:32:42,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 04:32:42,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 04:32:42,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 04:32:42,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 04:32:42,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 04:32:42,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 04:32:42,075 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 04:32:42,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 04:32:42,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 04:32:42,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 04:32:42,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 04:32:42,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 04:32:42,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 04:32:42,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 04:32:42,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 04:32:42,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 04:32:42,108 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 04:32:42,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 04:32:42,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 04:32:42,111 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 04:32:42,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 04:32:42,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 04:32:42,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 04:32:42,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 04:32:42,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 04:32:42,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 04:32:42,112 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 04:32:42,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 04:32:42,112 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 04:32:42,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 04:32:42,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 04:32:42,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 04:32:42,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 04:32:42,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 04:32:42,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:32:42,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 04:32:42,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 04:32:42,113 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 04:32:42,113 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 04:32:42,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 04:32:42,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 04:32:42,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 04:32:42,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 04:32:42,320 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 04:32:42,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/dijkstra-u.c [2022-03-20 04:32:42,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fc49d4c/18bcb4a24fc148f589157db92ebe58cb/FLAG9c27077bd [2022-03-20 04:32:42,704 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 04:32:42,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/dijkstra-u.c [2022-03-20 04:32:42,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fc49d4c/18bcb4a24fc148f589157db92ebe58cb/FLAG9c27077bd [2022-03-20 04:32:42,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00fc49d4c/18bcb4a24fc148f589157db92ebe58cb [2022-03-20 04:32:42,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 04:32:42,721 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 04:32:42,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 04:32:42,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 04:32:42,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 04:32:42,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7513e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42, skipping insertion in model container [2022-03-20 04:32:42,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 04:32:42,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 04:32:42,887 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/dijkstra-u.c[525,538] [2022-03-20 04:32:42,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:32:42,918 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 04:32:42,925 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/dijkstra-u.c[525,538] [2022-03-20 04:32:42,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 04:32:42,946 INFO L208 MainTranslator]: Completed translation [2022-03-20 04:32:42,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42 WrapperNode [2022-03-20 04:32:42,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 04:32:42,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 04:32:42,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 04:32:42,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 04:32:42,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 04:32:42,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 04:32:42,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 04:32:42,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 04:32:42,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42" (1/1) ... [2022-03-20 04:32:42,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 04:32:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:32:42,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 04:32:42,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 04:32:43,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 04:32:43,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 04:32:43,020 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 04:32:43,020 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 04:32:43,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 04:32:43,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 04:32:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 04:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 04:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 04:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 04:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 04:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 04:32:43,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 04:32:43,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 04:32:43,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 04:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 04:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 04:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 04:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 04:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 04:32:43,064 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 04:32:43,065 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 04:32:43,216 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 04:32:43,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 04:32:43,221 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 04:32:43,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:32:43 BoogieIcfgContainer [2022-03-20 04:32:43,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 04:32:43,223 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 04:32:43,223 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 04:32:43,224 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 04:32:43,226 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:32:43" (1/1) ... [2022-03-20 04:32:43,227 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 04:32:43,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:32:43 BasicIcfg [2022-03-20 04:32:43,239 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 04:32:43,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 04:32:43,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 04:32:43,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 04:32:43,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 04:32:42" (1/4) ... [2022-03-20 04:32:43,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cc1628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:32:43, skipping insertion in model container [2022-03-20 04:32:43,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 04:32:42" (2/4) ... [2022-03-20 04:32:43,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cc1628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 04:32:43, skipping insertion in model container [2022-03-20 04:32:43,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 04:32:43" (3/4) ... [2022-03-20 04:32:43,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cc1628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 04:32:43, skipping insertion in model container [2022-03-20 04:32:43,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 04:32:43" (4/4) ... [2022-03-20 04:32:43,246 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u.cJordan [2022-03-20 04:32:43,253 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 04:32:43,253 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 04:32:43,281 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 04:32:43,285 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 04:32:43,285 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 04:32:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 04:32:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 04:32:43,305 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:32:43,306 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:32:43,306 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:32:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:32:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1266400548, now seen corresponding path program 1 times [2022-03-20 04:32:43,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:32:43,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610044960] [2022-03-20 04:32:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:32:43,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:32:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:43,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:32:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:43,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 04:32:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:32:43,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:32:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610044960] [2022-03-20 04:32:43,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610044960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:32:43,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:32:43,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 04:32:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005981956] [2022-03-20 04:32:43,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:32:43,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 04:32:43,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:32:43,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 04:32:43,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:32:43,531 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:32:45,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:32:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:32:45,746 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-03-20 04:32:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 04:32:45,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 04:32:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:32:45,752 INFO L225 Difference]: With dead ends: 37 [2022-03-20 04:32:45,752 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 04:32:45,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 04:32:45,755 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 04:32:45,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 10 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 04:32:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 04:32:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 04:32:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 04:32:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 04:32:45,779 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-20 04:32:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:32:45,780 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 04:32:45,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:32:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 04:32:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 04:32:45,781 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:32:45,781 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:32:45,781 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 04:32:45,781 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:32:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:32:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash -543524408, now seen corresponding path program 1 times [2022-03-20 04:32:45,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:32:45,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811281640] [2022-03-20 04:32:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:32:45,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:32:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:45,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:32:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:45,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 04:32:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:32:45,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:32:45,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811281640] [2022-03-20 04:32:45,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811281640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:32:45,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:32:45,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 04:32:45,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975675279] [2022-03-20 04:32:45,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:32:45,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 04:32:45,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:32:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 04:32:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 04:32:45,995 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:32:50,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:32:53,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:32:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:32:54,139 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-03-20 04:32:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 04:32:54,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-03-20 04:32:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:32:54,141 INFO L225 Difference]: With dead ends: 49 [2022-03-20 04:32:54,141 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 04:32:54,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 04:32:54,142 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-03-20 04:32:54,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 61 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 195 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2022-03-20 04:32:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 04:32:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 04:32:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 04:32:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2022-03-20 04:32:54,150 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 19 [2022-03-20 04:32:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:32:54,150 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2022-03-20 04:32:54,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:32:54,150 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2022-03-20 04:32:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 04:32:54,151 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:32:54,151 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:32:54,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 04:32:54,151 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:32:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:32:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1156786847, now seen corresponding path program 1 times [2022-03-20 04:32:54,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:32:54,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964353039] [2022-03-20 04:32:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:32:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:32:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:54,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 04:32:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 04:32:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:32:54,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:32:54,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964353039] [2022-03-20 04:32:54,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964353039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 04:32:54,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944806316] [2022-03-20 04:32:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:32:54,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:32:54,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:32:54,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:32:54,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 04:32:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:32:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 04:32:54,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:32:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:32:54,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 04:32:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 04:32:54,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944806316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 04:32:54,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 04:32:54,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-20 04:32:54,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505165730] [2022-03-20 04:32:54,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 04:32:54,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 04:32:54,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:32:54,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 04:32:54,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-20 04:32:54,728 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:32:59,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 04:33:02,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:33:04,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:33:06,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:33:08,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:33:10,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:33:12,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:33:13,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:33:16,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:33:19,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 04:33:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:33:21,522 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2022-03-20 04:33:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 04:33:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-03-20 04:33:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:33:21,525 INFO L225 Difference]: With dead ends: 72 [2022-03-20 04:33:21,525 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 04:33:21,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-03-20 04:33:21,526 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 166 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2022-03-20 04:33:21,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 73 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 399 Invalid, 6 Unknown, 0 Unchecked, 26.6s Time] [2022-03-20 04:33:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 04:33:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-20 04:33:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 31 states have call successors, (31), 6 states have call predecessors, (31), 5 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 04:33:21,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2022-03-20 04:33:21,535 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 98 transitions. Word has length 21 [2022-03-20 04:33:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:33:21,536 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 98 transitions. [2022-03-20 04:33:21,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 04:33:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 98 transitions. [2022-03-20 04:33:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 04:33:21,536 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:33:21,537 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:33:21,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 04:33:21,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:33:21,738 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:33:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:33:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash 268754245, now seen corresponding path program 1 times [2022-03-20 04:33:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:33:21,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571845702] [2022-03-20 04:33:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:33:21,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:33:21,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:33:21,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955294328] [2022-03-20 04:33:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:33:21,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:33:21,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:33:21,749 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:33:21,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 04:33:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:33:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 04:33:21,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:33:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 04:33:21,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:33:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:33:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571845702] [2022-03-20 04:33:21,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:33:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955294328] [2022-03-20 04:33:21,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955294328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:33:21,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:33:21,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:33:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828546280] [2022-03-20 04:33:21,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:33:21,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:33:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:33:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:33:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:33:21,940 INFO L87 Difference]: Start difference. First operand 69 states and 98 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 04:33:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:33:22,567 INFO L93 Difference]: Finished difference Result 78 states and 105 transitions. [2022-03-20 04:33:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:33:22,567 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-03-20 04:33:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:33:22,568 INFO L225 Difference]: With dead ends: 78 [2022-03-20 04:33:22,568 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 04:33:22,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:33:22,569 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 04:33:22,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 161 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 04:33:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 04:33:22,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 04:33:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 04:33:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2022-03-20 04:33:22,576 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 29 [2022-03-20 04:33:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:33:22,577 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2022-03-20 04:33:22,577 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 04:33:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2022-03-20 04:33:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 04:33:22,577 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:33:22,577 INFO L499 BasicCegarLoop]: trace histogram [3, 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] [2022-03-20 04:33:22,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 04:33:22,778 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,SelfDestructingSolverStorable3 [2022-03-20 04:33:22,778 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:33:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:33:22,779 INFO L85 PathProgramCache]: Analyzing trace with hash 221269406, now seen corresponding path program 1 times [2022-03-20 04:33:22,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:33:22,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479603503] [2022-03-20 04:33:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:33:22,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:33:22,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:33:22,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152645222] [2022-03-20 04:33:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:33:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:33:22,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:33:22,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:33:22,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 04:33:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 04:33:22,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 04:33:22,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 04:33:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 04:33:22,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 04:33:22,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 04:33:22,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479603503] [2022-03-20 04:33:22,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 04:33:22,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152645222] [2022-03-20 04:33:22,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152645222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 04:33:22,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 04:33:22,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 04:33:22,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47487980] [2022-03-20 04:33:22,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 04:33:22,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 04:33:22,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 04:33:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 04:33:22,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 04:33:22,922 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 04:33:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 04:33:23,432 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2022-03-20 04:33:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 04:33:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-03-20 04:33:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 04:33:23,434 INFO L225 Difference]: With dead ends: 65 [2022-03-20 04:33:23,434 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 04:33:23,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 04:33:23,434 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 04:33:23,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 158 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 04:33:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 04:33:23,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-03-20 04:33:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 04:33:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-03-20 04:33:23,439 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 31 [2022-03-20 04:33:23,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 04:33:23,439 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-03-20 04:33:23,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 04:33:23,439 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-03-20 04:33:23,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 04:33:23,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 04:33:23,440 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 04:33:23,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 04:33:23,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:33:23,643 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 04:33:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 04:33:23,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1148816587, now seen corresponding path program 1 times [2022-03-20 04:33:23,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 04:33:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100946993] [2022-03-20 04:33:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:33:23,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 04:33:23,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 04:33:23,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617186243] [2022-03-20 04:33:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 04:33:23,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 04:33:23,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 04:33:23,653 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 04:33:23,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process