/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-scaling/divbin_unwindbound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 16:36:36,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 16:36:36,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 16:36:36,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 16:36:36,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 16:36:36,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 16:36:36,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 16:36:36,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 16:36:36,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 16:36:36,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 16:36:36,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 16:36:36,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 16:36:36,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 16:36:36,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 16:36:36,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 16:36:36,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 16:36:36,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 16:36:36,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 16:36:36,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 16:36:36,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 16:36:36,546 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 16:36:36,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 16:36:36,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 16:36:36,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 16:36:36,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 16:36:36,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 16:36:36,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 16:36:36,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 16:36:36,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 16:36:36,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 16:36:36,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 16:36:36,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 16:36:36,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 16:36:36,588 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 16:36:36,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 16:36:36,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 16:36:36,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 16:36:36,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 16:36:36,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 16:36:36,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 16:36:36,589 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 16:36:36,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 16:36:36,590 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 16:36:36,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 16:36:36,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 16:36:36,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 16:36:36,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 16:36:36,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 16:36:36,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:36:36,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 16:36:36,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 16:36:36,592 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 16:36:36,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 16:36:36,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 16:36:36,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 16:36:36,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 16:36:36,853 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 16:36:36,856 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 16:36:36,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound2.i [2022-03-17 16:36:36,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec36294ac/dc6f0e98f39a4cc18e2a1fea0ba75deb/FLAGf8d9b0156 [2022-03-17 16:36:37,265 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 16:36:37,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound2.i [2022-03-17 16:36:37,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec36294ac/dc6f0e98f39a4cc18e2a1fea0ba75deb/FLAGf8d9b0156 [2022-03-17 16:36:37,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec36294ac/dc6f0e98f39a4cc18e2a1fea0ba75deb [2022-03-17 16:36:37,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 16:36:37,682 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 16:36:37,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 16:36:37,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 16:36:37,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 16:36:37,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5f0833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37, skipping insertion in model container [2022-03-17 16:36:37,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 16:36:37,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 16:36:37,844 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/divbin_unwindbound2.i[950,963] [2022-03-17 16:36:37,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:36:37,871 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 16:36:37,887 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-scaling/divbin_unwindbound2.i[950,963] [2022-03-17 16:36:37,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 16:36:37,916 INFO L208 MainTranslator]: Completed translation [2022-03-17 16:36:37,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37 WrapperNode [2022-03-17 16:36:37,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 16:36:37,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 16:36:37,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 16:36:37,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 16:36:37,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 16:36:37,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 16:36:37,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 16:36:37,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 16:36:37,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37" (1/1) ... [2022-03-17 16:36:37,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 16:36:37,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:36:37,993 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) [2022-03-17 16:36:38,018 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 [2022-03-17 16:36:38,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 16:36:38,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 16:36:38,039 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 16:36:38,039 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 16:36:38,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 16:36:38,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 16:36:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 16:36:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 16:36:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 16:36:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 16:36:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 16:36:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 16:36:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 16:36:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 16:36:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 16:36:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 16:36:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 16:36:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 16:36:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 16:36:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 16:36:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 16:36:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 16:36:38,110 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 16:36:38,117 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 16:36:38,233 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 16:36:38,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 16:36:38,240 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 16:36:38,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:36:38 BoogieIcfgContainer [2022-03-17 16:36:38,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 16:36:38,242 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 16:36:38,243 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 16:36:38,244 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 16:36:38,247 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:36:38" (1/1) ... [2022-03-17 16:36:38,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:36:38 BasicIcfg [2022-03-17 16:36:38,263 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 16:36:38,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 16:36:38,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 16:36:38,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 16:36:38,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 04:36:37" (1/4) ... [2022-03-17 16:36:38,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e09071c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:36:38, skipping insertion in model container [2022-03-17 16:36:38,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 04:36:37" (2/4) ... [2022-03-17 16:36:38,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e09071c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 04:36:38, skipping insertion in model container [2022-03-17 16:36:38,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 04:36:38" (3/4) ... [2022-03-17 16:36:38,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e09071c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 04:36:38, skipping insertion in model container [2022-03-17 16:36:38,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 04:36:38" (4/4) ... [2022-03-17 16:36:38,270 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound2.iJordan [2022-03-17 16:36:38,274 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 16:36:38,274 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 16:36:38,321 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 16:36:38,330 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 [2022-03-17 16:36:38,330 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 16:36:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 16:36:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 16:36:38,361 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:36:38,361 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:36:38,362 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:36:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:36:38,367 INFO L85 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2022-03-17 16:36:38,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:36:38,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592596885] [2022-03-17 16:36:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:38,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:36:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:38,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 16:36:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:38,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 16:36:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:38,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 16:36:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:36:38,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:36:38,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592596885] [2022-03-17 16:36:38,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592596885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:36:38,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:36:38,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 16:36:38,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207281513] [2022-03-17 16:36:38,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:36:38,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 16:36:38,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:36:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 16:36:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:36:38,661 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:36:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:36:38,723 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-17 16:36:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 16:36:38,725 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 16:36:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:36:38,731 INFO L225 Difference]: With dead ends: 34 [2022-03-17 16:36:38,731 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 16:36:38,733 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:36:38,736 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:36:38,737 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:36:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 16:36:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-17 16:36:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 16:36:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-03-17 16:36:38,766 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2022-03-17 16:36:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:36:38,767 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-03-17 16:36:38,767 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:36:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-03-17 16:36:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 16:36:38,768 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:36:38,769 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:36:38,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 16:36:38,769 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:36:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:36:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2022-03-17 16:36:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:36:38,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784447951] [2022-03-17 16:36:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:36:38,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:36:38,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213952275] [2022-03-17 16:36:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:38,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:38,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:36:38,790 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) [2022-03-17 16:36:38,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 16:36:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:38,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 16:36:38,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:36:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:36:39,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:36:39,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:36:39,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784447951] [2022-03-17 16:36:39,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:36:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213952275] [2022-03-17 16:36:39,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213952275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:36:39,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:36:39,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 16:36:39,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150476989] [2022-03-17 16:36:39,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:36:39,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 16:36:39,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:36:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 16:36:39,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 16:36:39,049 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:36:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:36:39,076 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-03-17 16:36:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 16:36:39,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-17 16:36:39,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:36:39,080 INFO L225 Difference]: With dead ends: 30 [2022-03-17 16:36:39,080 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 16:36:39,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 16:36:39,082 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:36:39,082 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:36:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 16:36:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 16:36:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 16:36:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-03-17 16:36:39,091 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2022-03-17 16:36:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:36:39,092 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-03-17 16:36:39,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:36:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-03-17 16:36:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 16:36:39,093 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:36:39,093 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:36:39,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 16:36:39,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:39,321 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:36:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:36:39,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2022-03-17 16:36:39,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:36:39,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868243301] [2022-03-17 16:36:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:39,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:36:39,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:36:39,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970972048] [2022-03-17 16:36:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:39,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:39,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:36:39,358 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) [2022-03-17 16:36:39,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 16:36:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:39,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 16:36:39,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:36:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:36:39,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:36:39,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:36:39,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868243301] [2022-03-17 16:36:39,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:36:39,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970972048] [2022-03-17 16:36:39,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970972048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:36:39,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:36:39,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 16:36:39,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793813489] [2022-03-17 16:36:39,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:36:39,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:36:39,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:36:39,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:36:39,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:36:39,578 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:36:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:36:39,615 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-03-17 16:36:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:36:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-03-17 16:36:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:36:39,617 INFO L225 Difference]: With dead ends: 34 [2022-03-17 16:36:39,617 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 16:36:39,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:36:39,618 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:36:39,618 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:36:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 16:36:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-17 16:36:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 16:36:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-03-17 16:36:39,623 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2022-03-17 16:36:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:36:39,623 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-03-17 16:36:39,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:36:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-03-17 16:36:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 16:36:39,624 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:36:39,624 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:36:39,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 16:36:39,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 16:36:39,846 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:36:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:36:39,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2022-03-17 16:36:39,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:36:39,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148601428] [2022-03-17 16:36:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:39,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:36:39,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:36:39,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262518695] [2022-03-17 16:36:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:39,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:39,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:36:39,864 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) [2022-03-17 16:36:39,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 16:36:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:39,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 16:36:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:36:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 16:36:40,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:36:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:36:40,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:36:40,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148601428] [2022-03-17 16:36:40,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:36:40,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262518695] [2022-03-17 16:36:40,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262518695] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 16:36:40,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 16:36:40,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 16:36:40,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123341904] [2022-03-17 16:36:40,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:36:40,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 16:36:40,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:36:40,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 16:36:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:36:40,385 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:36:42,411 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 [] [2022-03-17 16:36:44,455 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 [] [2022-03-17 16:36:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:36:44,592 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-03-17 16:36:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 16:36:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-17 16:36:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:36:44,594 INFO L225 Difference]: With dead ends: 40 [2022-03-17 16:36:44,594 INFO L226 Difference]: Without dead ends: 39 [2022-03-17 16:36:44,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-17 16:36:44,596 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-17 16:36:44,596 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-03-17 16:36:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-17 16:36:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-17 16:36:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 16:36:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-03-17 16:36:44,604 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2022-03-17 16:36:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:36:44,605 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-03-17 16:36:44,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:36:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-03-17 16:36:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 16:36:44,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:36:44,606 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:36:44,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 16:36:44,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:44,807 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:36:44,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:36:44,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2022-03-17 16:36:44,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:36:44,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419800650] [2022-03-17 16:36:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:44,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:36:44,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:36:44,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511697655] [2022-03-17 16:36:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:44,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:44,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:36:44,823 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) [2022-03-17 16:36:44,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 16:36:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:44,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 16:36:44,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:36:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:36:44,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:36:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:36:45,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:36:45,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419800650] [2022-03-17 16:36:45,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:36:45,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511697655] [2022-03-17 16:36:45,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511697655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 16:36:45,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 16:36:45,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-17 16:36:45,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255743940] [2022-03-17 16:36:45,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 16:36:45,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 16:36:45,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:36:45,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 16:36:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 16:36:45,095 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 16:36:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:36:45,147 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-03-17 16:36:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 16:36:45,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2022-03-17 16:36:45,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:36:45,150 INFO L225 Difference]: With dead ends: 41 [2022-03-17 16:36:45,151 INFO L226 Difference]: Without dead ends: 41 [2022-03-17 16:36:45,151 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:36:45,153 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:36:45,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:36:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-17 16:36:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-17 16:36:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 16:36:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-03-17 16:36:45,172 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2022-03-17 16:36:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:36:45,172 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-03-17 16:36:45,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 16:36:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-03-17 16:36:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 16:36:45,173 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:36:45,173 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:36:45,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 16:36:45,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:45,374 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:36:45,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:36:45,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2022-03-17 16:36:45,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:36:45,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511397607] [2022-03-17 16:36:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:45,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:36:45,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:36:45,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917778244] [2022-03-17 16:36:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:45,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:45,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:36:45,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:36:45,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 16:36:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 16:36:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:36:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 16:36:45,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 16:36:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:36:46,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:36:46,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511397607] [2022-03-17 16:36:46,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:36:46,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917778244] [2022-03-17 16:36:46,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917778244] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 16:36:46,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 16:36:46,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 16:36:46,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495967368] [2022-03-17 16:36:46,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:36:46,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 16:36:46,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:36:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 16:36:46,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-17 16:36:46,071 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:36:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:36:46,109 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-03-17 16:36:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 16:36:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-17 16:36:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:36:46,111 INFO L225 Difference]: With dead ends: 49 [2022-03-17 16:36:46,111 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 16:36:46,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-17 16:36:46,112 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:36:46,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 135 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-03-17 16:36:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 16:36:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-17 16:36:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 16:36:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-03-17 16:36:46,117 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 29 [2022-03-17 16:36:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:36:46,118 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-03-17 16:36:46,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 16:36:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-03-17 16:36:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 16:36:46,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:36:46,119 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:36:46,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 16:36:46,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:46,336 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:36:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:36:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2022-03-17 16:36:46,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:36:46,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106492568] [2022-03-17 16:36:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:46,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:36:46,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:36:46,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072198746] [2022-03-17 16:36:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:46,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:46,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:36:46,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:36:46,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 16:36:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:46,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 16:36:46,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:36:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:36:46,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:36:46,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:36:46,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106492568] [2022-03-17 16:36:46,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:36:46,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072198746] [2022-03-17 16:36:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072198746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:36:46,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:36:46,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 16:36:46,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733039343] [2022-03-17 16:36:46,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:36:46,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 16:36:46,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:36:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 16:36:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 16:36:46,538 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:36:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:36:46,592 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-03-17 16:36:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 16:36:46,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-17 16:36:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:36:46,593 INFO L225 Difference]: With dead ends: 41 [2022-03-17 16:36:46,594 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 16:36:46,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-17 16:36:46,594 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 27 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:36:46,595 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:36:46,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 16:36:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-17 16:36:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 16:36:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-03-17 16:36:46,598 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2022-03-17 16:36:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:36:46,598 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-03-17 16:36:46,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 16:36:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-03-17 16:36:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 16:36:46,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 16:36:46,599 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-17 16:36:46,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 16:36:46,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:46,808 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 16:36:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 16:36:46,808 INFO L85 PathProgramCache]: Analyzing trace with hash -666194977, now seen corresponding path program 1 times [2022-03-17 16:36:46,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 16:36:46,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42965517] [2022-03-17 16:36:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:46,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 16:36:46,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 16:36:46,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81625535] [2022-03-17 16:36:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 16:36:46,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 16:36:46,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 16:36:46,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 16:36:46,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 16:36:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 16:36:46,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 16:36:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 16:36:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 16:36:46,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 16:36:46,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 16:36:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42965517] [2022-03-17 16:36:46,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 16:36:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81625535] [2022-03-17 16:36:46,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81625535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 16:36:46,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 16:36:46,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 16:36:46,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696703545] [2022-03-17 16:36:46,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 16:36:46,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 16:36:46,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 16:36:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 16:36:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:36:46,945 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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) [2022-03-17 16:36:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 16:36:46,950 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-17 16:36:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 16:36:46,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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 35 [2022-03-17 16:36:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 16:36:46,951 INFO L225 Difference]: With dead ends: 24 [2022-03-17 16:36:46,952 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 16:36:46,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 16:36:46,953 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 16:36:46,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 16:36:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 16:36:46,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 16:36:46,954 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) [2022-03-17 16:36:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 16:36:46,954 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-03-17 16:36:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 16:36:46,954 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 16:36:46,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 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) [2022-03-17 16:36:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 16:36:46,955 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 16:36:46,957 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 16:36:46,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 16:36:47,183 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 [2022-03-17 16:36:47,186 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 16:36:47,187 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 16:36:47,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 04:36:47 BasicIcfg [2022-03-17 16:36:47,190 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 16:36:47,191 INFO L158 Benchmark]: Toolchain (without parser) took 9508.39ms. Allocated memory was 189.8MB in the beginning and 228.6MB in the end (delta: 38.8MB). Free memory was 143.5MB in the beginning and 182.0MB in the end (delta: -38.5MB). Peak memory consumption was 1.9MB. Max. memory is 8.0GB. [2022-03-17 16:36:47,191 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 189.8MB. Free memory is still 159.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 16:36:47,191 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.01ms. Allocated memory is still 189.8MB. Free memory was 143.3MB in the beginning and 168.1MB in the end (delta: -24.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 16:36:47,191 INFO L158 Benchmark]: Boogie Preprocessor took 28.25ms. Allocated memory is still 189.8MB. Free memory was 168.1MB in the beginning and 166.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 16:36:47,192 INFO L158 Benchmark]: RCFGBuilder took 295.39ms. Allocated memory is still 189.8MB. Free memory was 166.7MB in the beginning and 156.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 16:36:47,192 INFO L158 Benchmark]: IcfgTransformer took 20.20ms. Allocated memory is still 189.8MB. Free memory was 156.2MB in the beginning and 154.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 16:36:47,192 INFO L158 Benchmark]: TraceAbstraction took 8926.08ms. Allocated memory was 189.8MB in the beginning and 228.6MB in the end (delta: 38.8MB). Free memory was 154.5MB in the beginning and 182.0MB in the end (delta: -27.5MB). Peak memory consumption was 12.7MB. Max. memory is 8.0GB. [2022-03-17 16:36:47,194 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 189.8MB. Free memory is still 159.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 233.01ms. Allocated memory is still 189.8MB. Free memory was 143.3MB in the beginning and 168.1MB in the end (delta: -24.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.25ms. Allocated memory is still 189.8MB. Free memory was 168.1MB in the beginning and 166.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 295.39ms. Allocated memory is still 189.8MB. Free memory was 166.7MB in the beginning and 156.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.20ms. Allocated memory is still 189.8MB. Free memory was 156.2MB in the beginning and 154.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 8926.08ms. Allocated memory was 189.8MB in the beginning and 228.6MB in the end (delta: 38.8MB). Free memory was 154.5MB in the beginning and 182.0MB in the end (delta: -27.5MB). Peak memory consumption was 12.7MB. 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: 21]: 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, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.9s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 77 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 74 mSDsluCounter, 659 SdHoareTripleChecker+Invalid, 4.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 12 IncrementalHoareTripleChecker+Unchecked, 405 mSDsCounter, 30 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 112 IncrementalHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 30 mSolverCounterUnsat, 254 mSDtfsCounter, 112 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 249 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=6, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 221 NumberOfCodeBlocks, 221 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 293 ConstructedInterpolants, 9 QuantifiedInterpolants, 979 SizeOfPredicates, 15 NumberOfNonLiveVariables, 679 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 11 InterpolantComputations, 7 PerfectInterpolantSequences, 51/61 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 RESULT: Ultimate proved your program to be correct! [2022-03-17 16:36:47,218 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...