/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/loops-crafted-1/mono-crafted_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 17:43:15,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 17:43:15,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 17:43:15,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 17:43:15,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 17:43:15,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 17:43:15,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 17:43:15,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 17:43:15,470 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 17:43:15,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 17:43:15,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 17:43:15,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 17:43:15,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 17:43:15,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 17:43:15,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 17:43:15,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 17:43:15,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 17:43:15,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 17:43:15,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 17:43:15,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 17:43:15,473 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 17:43:15,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 17:43:15,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 17:43:15,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 17:43:15,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 17:43:15,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 17:43:15,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:43:15,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 17:43:15,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 17:43:15,474 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 17:43:15,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 17:43:15,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 17:43:15,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 17:43:15,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 17:43:15,635 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 17:43:15,635 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 17:43:15,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-03-18 17:43:15,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e1f7bfb/6e5a8115d74549829d1f87ae4ec7ad6c/FLAG3042783d9 [2022-03-18 17:43:16,015 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 17:43:16,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-03-18 17:43:16,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e1f7bfb/6e5a8115d74549829d1f87ae4ec7ad6c/FLAG3042783d9 [2022-03-18 17:43:16,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e1f7bfb/6e5a8115d74549829d1f87ae4ec7ad6c [2022-03-18 17:43:16,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 17:43:16,033 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 17:43:16,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 17:43:16,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 17:43:16,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 17:43:16,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122a8bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16, skipping insertion in model container [2022-03-18 17:43:16,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 17:43:16,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 17:43:16,191 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-03-18 17:43:16,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:43:16,227 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 17:43:16,234 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c[318,331] [2022-03-18 17:43:16,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 17:43:16,244 INFO L208 MainTranslator]: Completed translation [2022-03-18 17:43:16,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16 WrapperNode [2022-03-18 17:43:16,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 17:43:16,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 17:43:16,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 17:43:16,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 17:43:16,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 17:43:16,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 17:43:16,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 17:43:16,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 17:43:16,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 17:43:16,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:16,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 17:43:16,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 17:43:16,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 17:43:16,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 17:43:16,332 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 17:43:16,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 17:43:16,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 17:43:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 17:43:16,370 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 17:43:16,371 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 17:43:16,493 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 17:43:16,497 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 17:43:16,497 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 17:43:16,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:43:16 BoogieIcfgContainer [2022-03-18 17:43:16,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 17:43:16,498 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 17:43:16,498 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 17:43:16,516 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 17:43:16,518 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:43:16" (1/1) ... [2022-03-18 17:43:16,678 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-18 17:43:16,678 INFO L91 elerationTransformer]: Accelerated Formula: (and (= v_main_~x~0_3 (+ v_main_~x~0_2 1)) (= (+ v_main_~y~0_1 1) v_main_~y~0_2) (< v_main_~z~0_1 v_main_~y~0_2)) InVars {main_~x~0=v_main_~x~0_3, main_~z~0=v_main_~z~0_1, main_~y~0=v_main_~y~0_2} OutVars{main_~x~0=v_main_~x~0_2, main_~z~0=v_main_~z~0_1, main_~y~0=v_main_~y~0_1, main_#t~post8=|v_main_#t~post8_1|, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~x~0, main_~y~0, main_#t~post8, main_#t~post7] to Formula: (or (and (<= v_main_~y~0_2 v_main_~z~0_1) (= v_main_~y~0_2 v_main_~y~0_1) (= v_main_~x~0_3 v_main_~x~0_2) (= |v_main_#t~post7_3| |v_main_#t~post7_1|) (= |v_main_#t~post8_3| |v_main_#t~post8_1|)) (and (< (+ v_main_~x~0_3 v_main_~z~0_1) (+ v_main_~x~0_2 v_main_~y~0_2 1)) (= (+ v_main_~x~0_2 v_main_~y~0_2) (+ v_main_~x~0_3 v_main_~y~0_1)) (< v_main_~x~0_2 v_main_~x~0_3))) InVars {main_~y~0=v_main_~y~0_2, main_~x~0=v_main_~x~0_3, main_#t~post8=|v_main_#t~post8_3|, main_~z~0=v_main_~z~0_1, main_#t~post7=|v_main_#t~post7_3|} OutVars{main_~y~0=v_main_~y~0_1, main_~x~0=v_main_~x~0_2, main_#t~post8=|v_main_#t~post8_1|, main_~z~0=v_main_~z~0_1, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~x~0, main_~y~0, main_#t~post8, main_#t~post7] [2022-03-18 17:43:16,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:43:16 BasicIcfg [2022-03-18 17:43:16,682 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 17:43:16,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 17:43:16,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 17:43:16,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 17:43:16,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:43:16" (1/4) ... [2022-03-18 17:43:16,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df20252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:43:16, skipping insertion in model container [2022-03-18 17:43:16,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:43:16" (2/4) ... [2022-03-18 17:43:16,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df20252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:43:16, skipping insertion in model container [2022-03-18 17:43:16,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:43:16" (3/4) ... [2022-03-18 17:43:16,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df20252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:43:16, skipping insertion in model container [2022-03-18 17:43:16,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 05:43:16" (4/4) ... [2022-03-18 17:43:16,687 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.cJordan [2022-03-18 17:43:16,690 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 17:43:16,690 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 17:43:16,714 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 17:43:16,718 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 [2022-03-18 17:43:16,718 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 17:43:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 17:43:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:43:16,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:16,730 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:16,731 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 164364990, now seen corresponding path program 1 times [2022-03-18 17:43:16,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:16,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995831941] [2022-03-18 17:43:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:16,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:16,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:16,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:16,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995831941] [2022-03-18 17:43:16,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995831941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:43:16,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:43:16,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 17:43:16,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482544950] [2022-03-18 17:43:16,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:43:16,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 17:43:16,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:16,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 17:43:16,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:43:16,903 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:16,925 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-03-18 17:43:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 17:43:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 17:43:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:16,937 INFO L225 Difference]: With dead ends: 21 [2022-03-18 17:43:16,937 INFO L226 Difference]: Without dead ends: 14 [2022-03-18 17:43:16,939 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 17:43:16,941 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:16,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:16,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-18 17:43:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-18 17:43:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-03-18 17:43:16,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-03-18 17:43:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:16,962 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-03-18 17:43:16,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-03-18 17:43:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 17:43:16,963 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:16,963 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:16,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 17:43:16,963 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:16,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash 165288511, now seen corresponding path program 1 times [2022-03-18 17:43:16,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:16,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129257548] [2022-03-18 17:43:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:16,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:16,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 17:43:17,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:17,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129257548] [2022-03-18 17:43:17,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129257548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:43:17,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:43:17,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 17:43:17,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546948910] [2022-03-18 17:43:17,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:43:17,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 17:43:17,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 17:43:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 17:43:17,009 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:17,052 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-03-18 17:43:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 17:43:17,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 17:43:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:17,053 INFO L225 Difference]: With dead ends: 16 [2022-03-18 17:43:17,053 INFO L226 Difference]: Without dead ends: 16 [2022-03-18 17:43:17,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 17:43:17,054 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:17,055 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-18 17:43:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-18 17:43:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-18 17:43:17,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-03-18 17:43:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:17,058 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-18 17:43:17,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-18 17:43:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 17:43:17,059 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:17,059 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:17,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 17:43:17,059 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1054746269, now seen corresponding path program 1 times [2022-03-18 17:43:17,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:17,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717963841] [2022-03-18 17:43:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:17,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:17,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:17,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:17,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717963841] [2022-03-18 17:43:17,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717963841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 17:43:17,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 17:43:17,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 17:43:17,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830075641] [2022-03-18 17:43:17,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 17:43:17,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 17:43:17,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:17,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 17:43:17,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 17:43:17,114 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:17,134 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-03-18 17:43:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 17:43:17,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 17:43:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:17,135 INFO L225 Difference]: With dead ends: 17 [2022-03-18 17:43:17,135 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 17:43:17,136 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 17:43:17,137 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:17,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 17:43:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 17:43:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 17:43:17,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-03-18 17:43:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:17,140 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 17:43:17,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 17:43:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 17:43:17,141 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:17,141 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:17,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 17:43:17,141 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477607, now seen corresponding path program 1 times [2022-03-18 17:43:17,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:17,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840092507] [2022-03-18 17:43:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:17,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:17,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840092507] [2022-03-18 17:43:17,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840092507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563540847] [2022-03-18 17:43:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:17,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:17,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:17,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:17,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 17:43:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:17,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 17:43:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:17,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 17:43:17,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563540847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:17,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:17,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 17:43:17,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084861832] [2022-03-18 17:43:17,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:17,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 17:43:17,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:17,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 17:43:17,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 17:43:17,383 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:17,456 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-03-18 17:43:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 17:43:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 17:43:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:17,457 INFO L225 Difference]: With dead ends: 22 [2022-03-18 17:43:17,457 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 17:43:17,458 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 17:43:17,458 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:17,459 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 17:43:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-18 17:43:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-03-18 17:43:17,461 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-03-18 17:43:17,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:17,462 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-03-18 17:43:17,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-03-18 17:43:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 17:43:17,462 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:17,463 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:17,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:17,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:17,676 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1507884679, now seen corresponding path program 1 times [2022-03-18 17:43:17,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:17,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212481418] [2022-03-18 17:43:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:17,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:17,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:43:17,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:17,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212481418] [2022-03-18 17:43:17,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212481418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:17,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276750967] [2022-03-18 17:43:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:17,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:17,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:17,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:17,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 17:43:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 17:43:17,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:43:17,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:43:17,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276750967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:17,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:17,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 17:43:17,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506813731] [2022-03-18 17:43:17,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:17,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 17:43:17,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 17:43:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 17:43:17,892 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:17,961 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-18 17:43:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 17:43:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-18 17:43:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:17,962 INFO L225 Difference]: With dead ends: 30 [2022-03-18 17:43:17,962 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 17:43:17,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 17:43:17,963 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:17,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 31 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 17:43:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-18 17:43:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-18 17:43:17,966 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-03-18 17:43:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:17,966 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-18 17:43:17,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-18 17:43:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 17:43:17,967 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:17,967 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:17,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:18,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:18,187 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 163921129, now seen corresponding path program 2 times [2022-03-18 17:43:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973787759] [2022-03-18 17:43:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:18,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:43:18,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973787759] [2022-03-18 17:43:18,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973787759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389786945] [2022-03-18 17:43:18,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:43:18,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:18,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:18,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:18,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 17:43:18,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:43:18,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 17:43:18,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:43:18,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:43:18,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389786945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:18,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:18,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 17:43:18,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284722276] [2022-03-18 17:43:18,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:18,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 17:43:18,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:18,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 17:43:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 17:43:18,496 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:18,682 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-03-18 17:43:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 17:43:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 17:43:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:18,683 INFO L225 Difference]: With dead ends: 46 [2022-03-18 17:43:18,683 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 17:43:18,684 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-18 17:43:18,684 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:18,685 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 17:43:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 17:43:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-18 17:43:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-03-18 17:43:18,688 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2022-03-18 17:43:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:18,689 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-03-18 17:43:18,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-03-18 17:43:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 17:43:18,690 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:18,690 INFO L500 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:18,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:18,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:18,908 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1399757879, now seen corresponding path program 3 times [2022-03-18 17:43:18,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:18,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023498875] [2022-03-18 17:43:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:18,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:19,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 17:43:19,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:19,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023498875] [2022-03-18 17:43:19,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023498875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:19,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081558528] [2022-03-18 17:43:19,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 17:43:19,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:19,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:19,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:19,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 17:43:19,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-18 17:43:19,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 17:43:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-18 17:43:19,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-18 17:43:19,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081558528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:19,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:19,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-18 17:43:19,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77653784] [2022-03-18 17:43:19,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:19,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 17:43:19,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 17:43:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-18 17:43:19,369 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:19,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:19,687 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-03-18 17:43:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 17:43:19,687 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-18 17:43:19,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:19,689 INFO L225 Difference]: With dead ends: 56 [2022-03-18 17:43:19,689 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 17:43:19,690 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 17:43:19,690 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:19,691 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 35 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:43:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 17:43:19,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-18 17:43:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-03-18 17:43:19,695 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 45 [2022-03-18 17:43:19,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:19,696 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-03-18 17:43:19,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-03-18 17:43:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 17:43:19,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:19,697 INFO L500 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:19,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:19,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:19,899 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash -809396335, now seen corresponding path program 4 times [2022-03-18 17:43:19,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:19,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048358693] [2022-03-18 17:43:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:20,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:43:20,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:20,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048358693] [2022-03-18 17:43:20,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048358693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:20,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588292843] [2022-03-18 17:43:20,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 17:43:20,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:20,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:20,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 17:43:20,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 17:43:20,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:20,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 17:43:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:43:20,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:43:20,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588292843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:20,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:20,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 17:43:20,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74857846] [2022-03-18 17:43:20,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:20,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 17:43:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 17:43:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 17:43:20,514 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:21,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:21,021 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-03-18 17:43:21,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 17:43:21,022 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-18 17:43:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:21,023 INFO L225 Difference]: With dead ends: 90 [2022-03-18 17:43:21,023 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 17:43:21,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 17:43:21,025 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:21,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 17:43:21,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 17:43:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-18 17:43:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-03-18 17:43:21,030 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 55 [2022-03-18 17:43:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:21,030 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-03-18 17:43:21,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-03-18 17:43:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 17:43:21,032 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:21,032 INFO L500 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:21,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:21,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:21,250 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:21,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:21,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1122744237, now seen corresponding path program 5 times [2022-03-18 17:43:21,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:21,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241032137] [2022-03-18 17:43:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:21,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:21,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:43:21,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:21,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241032137] [2022-03-18 17:43:21,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241032137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:21,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848905248] [2022-03-18 17:43:21,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 17:43:21,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:21,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:21,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 17:43:21,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-18 17:43:21,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 17:43:21,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:43:21,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:43:22,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848905248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:22,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:22,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-18 17:43:22,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847444043] [2022-03-18 17:43:22,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:22,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 17:43:22,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 17:43:22,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 17:43:22,818 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:24,414 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-03-18 17:43:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 17:43:24,414 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-18 17:43:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:24,417 INFO L225 Difference]: With dead ends: 158 [2022-03-18 17:43:24,418 INFO L226 Difference]: Without dead ends: 158 [2022-03-18 17:43:24,422 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 17:43:24,425 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:24,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 41 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 17:43:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-18 17:43:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-03-18 17:43:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0522875816993464) internal successors, (161), 153 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2022-03-18 17:43:24,465 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 89 [2022-03-18 17:43:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:24,465 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2022-03-18 17:43:24,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2022-03-18 17:43:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 17:43:24,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:24,467 INFO L500 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:24,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 17:43:24,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:24,684 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash -666328347, now seen corresponding path program 6 times [2022-03-18 17:43:24,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:24,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149386473] [2022-03-18 17:43:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:24,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:26,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 17:43:26,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:26,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149386473] [2022-03-18 17:43:26,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149386473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:26,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95611055] [2022-03-18 17:43:26,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 17:43:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:26,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:26,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 17:43:26,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-18 17:43:26,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:26,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 17:43:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-18 17:43:26,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-18 17:43:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95611055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:27,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:27,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-03-18 17:43:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238468980] [2022-03-18 17:43:27,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:27,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 17:43:27,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 17:43:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 17:43:27,052 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:29,535 INFO L93 Difference]: Finished difference Result 176 states and 191 transitions. [2022-03-18 17:43:29,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 17:43:29,535 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-03-18 17:43:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:29,536 INFO L225 Difference]: With dead ends: 176 [2022-03-18 17:43:29,536 INFO L226 Difference]: Without dead ends: 176 [2022-03-18 17:43:29,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 17:43:29,542 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 170 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:29,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 55 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 17:43:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-18 17:43:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-03-18 17:43:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0935672514619883) internal successors, (187), 171 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 191 transitions. [2022-03-18 17:43:29,546 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 191 transitions. Word has length 157 [2022-03-18 17:43:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:29,546 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 191 transitions. [2022-03-18 17:43:29,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 191 transitions. [2022-03-18 17:43:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-18 17:43:29,548 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:29,548 INFO L500 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:29,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:29,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:29,765 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:29,765 INFO L85 PathProgramCache]: Analyzing trace with hash -28776167, now seen corresponding path program 7 times [2022-03-18 17:43:29,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:29,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864370282] [2022-03-18 17:43:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:29,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:31,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:43:31,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:31,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864370282] [2022-03-18 17:43:31,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864370282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:31,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295483499] [2022-03-18 17:43:31,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 17:43:31,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:31,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:31,347 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:31,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 17:43:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:31,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 17:43:31,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:43:31,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:43:35,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295483499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:35,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:35,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 17:43:35,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941926362] [2022-03-18 17:43:35,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:35,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-18 17:43:35,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-18 17:43:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 17:43:35,195 INFO L87 Difference]: Start difference. First operand 176 states and 191 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:43:40,695 INFO L93 Difference]: Finished difference Result 314 states and 329 transitions. [2022-03-18 17:43:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-18 17:43:40,696 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-03-18 17:43:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:43:40,697 INFO L225 Difference]: With dead ends: 314 [2022-03-18 17:43:40,697 INFO L226 Difference]: Without dead ends: 314 [2022-03-18 17:43:40,701 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-18 17:43:40,701 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 17:43:40,701 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 36 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 17:43:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-03-18 17:43:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2022-03-18 17:43:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.051779935275081) internal successors, (325), 309 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 329 transitions. [2022-03-18 17:43:40,714 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 329 transitions. Word has length 175 [2022-03-18 17:43:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:43:40,714 INFO L478 AbstractCegarLoop]: Abstraction has 314 states and 329 transitions. [2022-03-18 17:43:40,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:43:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 329 transitions. [2022-03-18 17:43:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-03-18 17:43:40,719 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:43:40,719 INFO L500 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:43:40,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 17:43:40,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 17:43:40,940 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:43:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:43:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash 270983653, now seen corresponding path program 8 times [2022-03-18 17:43:40,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:43:40,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936871289] [2022-03-18 17:43:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:43:40,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:43:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:44,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:43:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:43:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:43:44,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:43:44,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936871289] [2022-03-18 17:43:44,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936871289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:43:44,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446789851] [2022-03-18 17:43:44,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 17:43:44,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:43:44,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:43:44,864 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:43:44,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 17:43:44,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 17:43:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:43:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-18 17:43:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:43:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:43:45,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:43:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:43:58,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446789851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:43:58,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:43:58,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-18 17:43:58,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966531353] [2022-03-18 17:43:58,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:43:58,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-18 17:43:58,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:43:58,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-18 17:43:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-18 17:43:58,650 INFO L87 Difference]: Start difference. First operand 314 states and 329 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:44:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:44:14,680 INFO L93 Difference]: Finished difference Result 590 states and 605 transitions. [2022-03-18 17:44:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-18 17:44:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-03-18 17:44:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:44:14,693 INFO L225 Difference]: With dead ends: 590 [2022-03-18 17:44:14,693 INFO L226 Difference]: Without dead ends: 590 [2022-03-18 17:44:14,706 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-18 17:44:14,720 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 17:44:14,721 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 36 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 17:44:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-03-18 17:44:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2022-03-18 17:44:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 585 states have (on average 1.0273504273504273) internal successors, (601), 585 states have internal predecessors, (601), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:44:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 605 transitions. [2022-03-18 17:44:14,740 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 605 transitions. Word has length 313 [2022-03-18 17:44:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:44:14,740 INFO L478 AbstractCegarLoop]: Abstraction has 590 states and 605 transitions. [2022-03-18 17:44:14,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:44:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 605 transitions. [2022-03-18 17:44:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-03-18 17:44:14,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:44:14,747 INFO L500 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:44:14,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 17:44:14,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:44:14,972 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:44:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:44:14,973 INFO L85 PathProgramCache]: Analyzing trace with hash -404183427, now seen corresponding path program 9 times [2022-03-18 17:44:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:44:14,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218165401] [2022-03-18 17:44:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:44:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:44:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:44:28,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:44:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:44:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-18 17:44:28,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:44:28,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218165401] [2022-03-18 17:44:28,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218165401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:44:28,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944809698] [2022-03-18 17:44:28,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 17:44:28,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:44:28,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:44:28,870 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:44:28,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 17:44:28,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-03-18 17:44:28,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:44:28,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 17:44:28,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:44:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-18 17:44:30,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:44:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-18 17:44:32,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944809698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:44:32,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:44:32,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-03-18 17:44:32,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061471783] [2022-03-18 17:44:32,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:44:32,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-03-18 17:44:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:44:32,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-03-18 17:44:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-03-18 17:44:32,686 INFO L87 Difference]: Start difference. First operand 590 states and 605 transitions. Second operand has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:44:57,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:44:57,205 INFO L93 Difference]: Finished difference Result 624 states and 655 transitions. [2022-03-18 17:44:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-03-18 17:44:57,206 INFO L78 Accepts]: Start accepts. Automaton has has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 589 [2022-03-18 17:44:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:44:57,208 INFO L225 Difference]: With dead ends: 624 [2022-03-18 17:44:57,208 INFO L226 Difference]: Without dead ends: 624 [2022-03-18 17:44:57,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1790 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-03-18 17:44:57,223 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 908 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 1580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1580 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 17:44:57,223 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 40 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1580 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 17:44:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-03-18 17:44:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-03-18 17:44:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 619 states have (on average 1.0516962843295639) internal successors, (651), 619 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:44:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 655 transitions. [2022-03-18 17:44:57,230 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 655 transitions. Word has length 589 [2022-03-18 17:44:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:44:57,231 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 655 transitions. [2022-03-18 17:44:57,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:44:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 655 transitions. [2022-03-18 17:44:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-03-18 17:44:57,237 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:44:57,237 INFO L500 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:44:57,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 17:44:57,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 17:44:57,450 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:44:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:44:57,451 INFO L85 PathProgramCache]: Analyzing trace with hash -876081783, now seen corresponding path program 10 times [2022-03-18 17:44:57,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:44:57,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412311159] [2022-03-18 17:44:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:44:57,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:44:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:12,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:45:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:45:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:45:12,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:45:12,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412311159] [2022-03-18 17:45:12,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412311159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:45:12,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110045262] [2022-03-18 17:45:12,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 17:45:12,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:45:12,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:45:12,458 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:45:12,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 17:45:12,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 17:45:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:45:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-18 17:45:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:45:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:45:13,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:45:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:45:57,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110045262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:45:57,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:45:57,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-18 17:45:57,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883470188] [2022-03-18 17:45:57,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:45:57,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-18 17:45:57,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:45:57,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-18 17:45:57,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-18 17:45:57,310 INFO L87 Difference]: Start difference. First operand 624 states and 655 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:47:07,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:47:07,778 INFO L93 Difference]: Finished difference Result 1178 states and 1209 transitions. [2022-03-18 17:47:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-18 17:47:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 623 [2022-03-18 17:47:07,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:47:07,795 INFO L225 Difference]: With dead ends: 1178 [2022-03-18 17:47:07,795 INFO L226 Difference]: Without dead ends: 1178 [2022-03-18 17:47:07,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2077 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 120.7s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-18 17:47:07,858 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 17:47:07,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 61 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 17:47:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-03-18 17:47:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1178. [2022-03-18 17:47:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1173 states have (on average 1.0272804774083546) internal successors, (1205), 1173 states have internal predecessors, (1205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:47:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1209 transitions. [2022-03-18 17:47:07,871 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1209 transitions. Word has length 623 [2022-03-18 17:47:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:47:07,872 INFO L478 AbstractCegarLoop]: Abstraction has 1178 states and 1209 transitions. [2022-03-18 17:47:07,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:47:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1209 transitions. [2022-03-18 17:47:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1178 [2022-03-18 17:47:07,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:47:07,882 INFO L500 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:47:07,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-18 17:47:08,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 17:47:08,084 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:47:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:47:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1533344021, now seen corresponding path program 11 times [2022-03-18 17:47:08,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:47:08,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151721050] [2022-03-18 17:47:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:47:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:47:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:48:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 17:48:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 17:48:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:48:11,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 17:48:11,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151721050] [2022-03-18 17:48:11,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151721050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 17:48:11,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192097285] [2022-03-18 17:48:11,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 17:48:11,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 17:48:11,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 17:48:11,925 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 17:48:11,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 17:48:14,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-03-18 17:48:14,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 17:48:14,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 2445 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-18 17:48:14,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 17:48:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:48:16,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 17:51:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-18 17:51:15,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192097285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 17:51:15,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 17:51:15,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-03-18 17:51:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132341110] [2022-03-18 17:51:15,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 17:51:16,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-03-18 17:51:16,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 17:51:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-03-18 17:51:16,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-03-18 17:51:16,256 INFO L87 Difference]: Start difference. First operand 1178 states and 1209 transitions. Second operand has 1110 states, 1110 states have (on average 2.007207207207207) internal successors, (2228), 1109 states have internal predecessors, (2228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:57:04,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 17:57:04,431 INFO L93 Difference]: Finished difference Result 2286 states and 2317 transitions. [2022-03-18 17:57:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1109 states. [2022-03-18 17:57:04,432 INFO L78 Accepts]: Start accepts. Automaton has has 1110 states, 1110 states have (on average 2.007207207207207) internal successors, (2228), 1109 states have internal predecessors, (2228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1177 [2022-03-18 17:57:04,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 17:57:04,439 INFO L225 Difference]: With dead ends: 2286 [2022-03-18 17:57:04,439 INFO L226 Difference]: Without dead ends: 2286 [2022-03-18 17:57:04,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4016 GetRequests, 1802 SyntacticMatches, 0 SemanticMatches, 2214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767005 ImplicationChecksByTransitivity, 530.2s TimeCoverageRelationStatistics Valid=1840943, Invalid=3067497, Unknown=0, NotChecked=0, Total=4908440 [2022-03-18 17:57:04,951 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 1116 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 1664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 3943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1664 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 17:57:04,951 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 56 Invalid, 3943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1664 Valid, 2279 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 17:57:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-03-18 17:57:04,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2286. [2022-03-18 17:57:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2281 states have (on average 1.0140289346777729) internal successors, (2313), 2281 states have internal predecessors, (2313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:57:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 2317 transitions. [2022-03-18 17:57:05,011 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 2317 transitions. Word has length 1177 [2022-03-18 17:57:05,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 17:57:05,012 INFO L478 AbstractCegarLoop]: Abstraction has 2286 states and 2317 transitions. [2022-03-18 17:57:05,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 1110 states, 1110 states have (on average 2.007207207207207) internal successors, (2228), 1109 states have internal predecessors, (2228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 17:57:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 2317 transitions. [2022-03-18 17:57:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2286 [2022-03-18 17:57:05,043 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 17:57:05,043 INFO L500 BasicCegarLoop]: trace histogram [1136, 1106, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 17:57:05,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 17:57:05,252 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 17:57:05,252 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 17:57:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 17:57:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1083636947, now seen corresponding path program 12 times [2022-03-18 17:57:05,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 17:57:05,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252329617] [2022-03-18 17:57:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 17:57:05,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 17:57:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat