/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 01:46:14,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 01:46:14,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 01:46:14,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 01:46:14,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 01:46:14,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 01:46:14,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 01:46:14,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 01:46:14,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 01:46:14,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 01:46:14,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 01:46:14,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 01:46:14,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 01:46:14,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 01:46:14,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 01:46:14,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 01:46:14,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 01:46:14,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 01:46:14,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 01:46:14,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 01:46:14,263 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 01:46:14,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 01:46:14,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 01:46:14,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 01:46:14,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 01:46:14,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 01:46:14,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 01:46:14,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 01:46:14,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 01:46:14,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 01:46:14,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 01:46:14,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 01:46:14,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 01:46:14,301 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 01:46:14,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 01:46:14,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 01:46:14,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 01:46:14,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 01:46:14,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 01:46:14,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 01:46:14,302 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 01:46:14,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 01:46:14,302 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 01:46:14,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 01:46:14,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 01:46:14,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 01:46:14,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 01:46:14,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 01:46:14,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:46:14,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 01:46:14,303 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 01:46:14,304 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 01:46:14,304 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 01:46:14,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 01:46:14,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 01:46:14,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 01:46:14,524 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 01:46:14,525 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 01:46:14,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c [2022-04-05 01:46:14,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2616bde8e/4efd57f2715a40aba9fc2746214e2d5a/FLAG4724d64c8 [2022-04-05 01:46:14,965 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 01:46:14,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c [2022-04-05 01:46:14,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2616bde8e/4efd57f2715a40aba9fc2746214e2d5a/FLAG4724d64c8 [2022-04-05 01:46:14,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2616bde8e/4efd57f2715a40aba9fc2746214e2d5a [2022-04-05 01:46:14,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 01:46:14,985 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 01:46:14,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 01:46:14,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 01:46:14,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 01:46:14,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:46:14" (1/1) ... [2022-04-05 01:46:14,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fcaf5f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:14, skipping insertion in model container [2022-04-05 01:46:14,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:46:14" (1/1) ... [2022-04-05 01:46:14,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 01:46:15,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 01:46:15,204 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2022-04-05 01:46:15,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:46:15,248 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 01:46:15,260 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2022-04-05 01:46:15,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:46:15,303 INFO L208 MainTranslator]: Completed translation [2022-04-05 01:46:15,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15 WrapperNode [2022-04-05 01:46:15,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 01:46:15,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 01:46:15,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 01:46:15,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 01:46:15,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15" (1/1) ... [2022-04-05 01:46:15,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15" (1/1) ... [2022-04-05 01:46:15,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15" (1/1) ... [2022-04-05 01:46:15,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15" (1/1) ... [2022-04-05 01:46:15,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15" (1/1) ... [2022-04-05 01:46:15,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15" (1/1) ... [2022-04-05 01:46:15,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15" (1/1) ... [2022-04-05 01:46:15,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 01:46:15,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 01:46:15,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 01:46:15,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 01:46:15,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15" (1/1) ... [2022-04-05 01:46:15,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:46:15,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:46:15,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 01:46:15,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 01:46:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 01:46:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 01:46:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 01:46:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 01:46:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 01:46:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 01:46:15,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 01:46:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 01:46:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 01:46:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 01:46:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 01:46:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 01:46:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 01:46:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 01:46:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 01:46:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 01:46:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 01:46:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 01:46:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 01:46:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 01:46:15,470 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 01:46:15,472 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 01:46:15,674 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 01:46:15,679 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 01:46:15,679 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 01:46:15,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:46:15 BoogieIcfgContainer [2022-04-05 01:46:15,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 01:46:15,681 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 01:46:15,681 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 01:46:15,682 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 01:46:15,685 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:46:15" (1/1) ... [2022-04-05 01:46:15,686 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 01:46:15,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:46:15 BasicIcfg [2022-04-05 01:46:15,702 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 01:46:15,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 01:46:15,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 01:46:15,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 01:46:15,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 01:46:14" (1/4) ... [2022-04-05 01:46:15,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acbab08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:46:15, skipping insertion in model container [2022-04-05 01:46:15,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:46:15" (2/4) ... [2022-04-05 01:46:15,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acbab08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:46:15, skipping insertion in model container [2022-04-05 01:46:15,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:46:15" (3/4) ... [2022-04-05 01:46:15,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7acbab08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:46:15, skipping insertion in model container [2022-04-05 01:46:15,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:46:15" (4/4) ... [2022-04-05 01:46:15,708 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound100.cJordan [2022-04-05 01:46:15,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 01:46:15,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 01:46:15,767 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 01:46:15,774 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 [2022-04-05 01:46:15,775 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 01:46:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 01:46:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 01:46:15,803 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:46:15,804 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:46:15,804 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:46:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:46:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-04-05 01:46:15,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:46:15,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20369900] [2022-04-05 01:46:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:46:15,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:46:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:15,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:46:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:16,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:46:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:16,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 01:46:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 01:46:16,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:46:16,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20369900] [2022-04-05 01:46:16,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20369900] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:46:16,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:46:16,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 01:46:16,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296859347] [2022-04-05 01:46:16,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:46:16,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 01:46:16,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:46:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 01:46:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 01:46:16,060 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 01:46:18,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:46:18,224 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-04-05 01:46:18,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 01:46:18,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 01:46:18,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:46:18,233 INFO L225 Difference]: With dead ends: 38 [2022-04-05 01:46:18,233 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 01:46:18,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 01:46:18,236 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:46:18,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-05 01:46:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 01:46:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-05 01:46:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 01:46:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-04-05 01:46:18,272 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-04-05 01:46:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:46:18,272 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-04-05 01:46:18,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 01:46:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-04-05 01:46:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 01:46:18,273 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:46:18,274 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:46:18,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 01:46:18,274 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:46:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:46:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-04-05 01:46:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:46:18,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57691328] [2022-04-05 01:46:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:46:18,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:46:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:18,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:46:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:18,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:46:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:18,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 01:46:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 01:46:18,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:46:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57691328] [2022-04-05 01:46:18,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57691328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:46:18,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:46:18,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 01:46:18,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288612327] [2022-04-05 01:46:18,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:46:18,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 01:46:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:46:18,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 01:46:18,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 01:46:18,518 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 01:46:20,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:22,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:24,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:25,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:28,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:46:29,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:31,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:34,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:46:36,398 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-04-05 01:46:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 01:46:36,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-05 01:46:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:46:36,401 INFO L225 Difference]: With dead ends: 44 [2022-04-05 01:46:36,401 INFO L226 Difference]: Without dead ends: 44 [2022-04-05 01:46:36,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-05 01:46:36,402 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 25 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2022-04-05 01:46:36,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 55 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 176 Invalid, 6 Unknown, 0 Unchecked, 17.8s Time] [2022-04-05 01:46:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-05 01:46:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-05 01:46:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 01:46:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-04-05 01:46:36,412 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 24 [2022-04-05 01:46:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:46:36,413 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-04-05 01:46:36,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 01:46:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-04-05 01:46:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 01:46:36,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:46:36,414 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:46:36,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 01:46:36,414 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:46:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:46:36,415 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-04-05 01:46:36,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:46:36,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178898681] [2022-04-05 01:46:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:46:36,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:46:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:36,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:46:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:36,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:46:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:36,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 01:46:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 01:46:36,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:46:36,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178898681] [2022-04-05 01:46:36,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178898681] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:46:36,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:46:36,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 01:46:36,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097143038] [2022-04-05 01:46:36,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:46:36,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 01:46:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:46:36,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 01:46:36,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 01:46:36,618 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 01:46:39,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:41,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:46,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:46:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:46:47,111 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2022-04-05 01:46:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 01:46:47,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-04-05 01:46:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:46:47,114 INFO L225 Difference]: With dead ends: 68 [2022-04-05 01:46:47,114 INFO L226 Difference]: Without dead ends: 66 [2022-04-05 01:46:47,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-05 01:46:47,115 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 79 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-04-05 01:46:47,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 49 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 223 Invalid, 3 Unknown, 0 Unchecked, 10.4s Time] [2022-04-05 01:46:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-05 01:46:47,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-04-05 01:46:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 28 states have call successors, (28), 6 states have call predecessors, (28), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-05 01:46:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 91 transitions. [2022-04-05 01:46:47,126 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 91 transitions. Word has length 26 [2022-04-05 01:46:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:46:47,126 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 91 transitions. [2022-04-05 01:46:47,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 01:46:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 91 transitions. [2022-04-05 01:46:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 01:46:47,133 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:46:47,133 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:46:47,134 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 01:46:47,135 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:46:47,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:46:47,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-04-05 01:46:47,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:46:47,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568033931] [2022-04-05 01:46:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:46:47,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:46:47,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:46:47,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543069355] [2022-04-05 01:46:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:46:47,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:46:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:46:47,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:46:47,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 01:46:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:47,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 01:46:47,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:46:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 01:46:47,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:46:47,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:46:47,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568033931] [2022-04-05 01:46:47,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:46:47,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543069355] [2022-04-05 01:46:47,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543069355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:46:47,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:46:47,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:46:47,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799135230] [2022-04-05 01:46:47,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:46:47,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:46:47,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:46:47,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:46:47,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:46:47,510 INFO L87 Difference]: Start difference. First operand 64 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 01:46:49,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:46:51,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:46:53,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:46:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:46:54,290 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2022-04-05 01:46:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:46:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-05 01:46:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:46:54,294 INFO L225 Difference]: With dead ends: 78 [2022-04-05 01:46:54,295 INFO L226 Difference]: Without dead ends: 57 [2022-04-05 01:46:54,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:46:54,296 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-04-05 01:46:54,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 3 Unknown, 0 Unchecked, 6.8s Time] [2022-04-05 01:46:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-05 01:46:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-05 01:46:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 26 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 01:46:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2022-04-05 01:46:54,306 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 34 [2022-04-05 01:46:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:46:54,306 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2022-04-05 01:46:54,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 01:46:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2022-04-05 01:46:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 01:46:54,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:46:54,307 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:46:54,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 01:46:54,511 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 [2022-04-05 01:46:54,512 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:46:54,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:46:54,513 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-04-05 01:46:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:46:54,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050662968] [2022-04-05 01:46:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:46:54,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:46:54,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:46:54,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861735249] [2022-04-05 01:46:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:46:54,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:46:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:46:54,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:46:54,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 01:46:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:46:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:46:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:46:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-05 01:46:54,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:46:54,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:46:54,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050662968] [2022-04-05 01:46:54,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:46:54,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861735249] [2022-04-05 01:46:54,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861735249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:46:54,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:46:54,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:46:54,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708192419] [2022-04-05 01:46:54,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:46:54,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:46:54,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:46:54,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:46:54,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:46:54,728 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 01:46:56,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:46:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:46:57,189 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2022-04-05 01:46:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:46:57,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-05 01:46:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:46:57,191 INFO L225 Difference]: With dead ends: 65 [2022-04-05 01:46:57,191 INFO L226 Difference]: Without dead ends: 64 [2022-04-05 01:46:57,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:46:57,192 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-05 01:46:57,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-04-05 01:46:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-05 01:46:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-05 01:46:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-05 01:46:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-04-05 01:46:57,201 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 36 [2022-04-05 01:46:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:46:57,202 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-04-05 01:46:57,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 01:46:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-04-05 01:46:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 01:46:57,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:46:57,203 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:46:57,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 01:46:57,411 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 [2022-04-05 01:46:57,412 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:46:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:46:57,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-04-05 01:46:57,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:46:57,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248497647] [2022-04-05 01:46:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:46:57,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:46:57,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:46:57,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856339957] [2022-04-05 01:46:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:46:57,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:46:57,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:46:57,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:46:57,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process