/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/divbin2_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 02:01:08,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 02:01:08,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 02:01:08,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 02:01:08,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 02:01:08,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 02:01:08,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 02:01:08,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 02:01:08,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 02:01:08,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 02:01:08,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 02:01:08,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 02:01:08,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 02:01:08,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 02:01:08,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 02:01:08,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 02:01:08,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 02:01:08,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 02:01:08,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 02:01:08,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 02:01:08,471 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 02:01:08,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 02:01:08,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 02:01:08,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 02:01:08,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 02:01:08,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 02:01:08,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 02:01:08,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 02:01:08,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 02:01:08,488 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 02:01:08,501 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 02:01:08,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 02:01:08,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 02:01:08,503 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 02:01:08,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 02:01:08,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 02:01:08,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 02:01:08,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 02:01:08,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 02:01:08,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 02:01:08,505 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 02:01:08,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 02:01:08,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 02:01:08,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 02:01:08,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 02:01:08,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 02:01:08,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 02:01:08,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 02:01:08,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:01:08,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 02:01:08,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 02:01:08,507 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 02:01:08,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 02:01:08,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 02:01:08,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 02:01:08,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 02:01:08,792 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 02:01:08,793 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 02:01:08,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i [2022-04-05 02:01:08,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e62b9d07f/3a6dbe72ee99484f992d82e264429cf2/FLAG37fb573b4 [2022-04-05 02:01:09,399 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 02:01:09,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound20.i [2022-04-05 02:01:09,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e62b9d07f/3a6dbe72ee99484f992d82e264429cf2/FLAG37fb573b4 [2022-04-05 02:01:09,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e62b9d07f/3a6dbe72ee99484f992d82e264429cf2 [2022-04-05 02:01:09,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 02:01:09,787 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 02:01:09,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 02:01:09,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 02:01:09,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 02:01:09,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:01:09" (1/1) ... [2022-04-05 02:01:09,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5851b3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:09, skipping insertion in model container [2022-04-05 02:01:09,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:01:09" (1/1) ... [2022-04-05 02:01:09,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 02:01:09,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 02:01:10,074 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/divbin2_valuebound20.i[951,964] [2022-04-05 02:01:10,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:01:10,113 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 02:01:10,123 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/divbin2_valuebound20.i[951,964] [2022-04-05 02:01:10,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:01:10,139 INFO L208 MainTranslator]: Completed translation [2022-04-05 02:01:10,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10 WrapperNode [2022-04-05 02:01:10,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 02:01:10,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 02:01:10,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 02:01:10,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 02:01:10,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10" (1/1) ... [2022-04-05 02:01:10,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10" (1/1) ... [2022-04-05 02:01:10,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10" (1/1) ... [2022-04-05 02:01:10,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10" (1/1) ... [2022-04-05 02:01:10,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10" (1/1) ... [2022-04-05 02:01:10,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10" (1/1) ... [2022-04-05 02:01:10,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10" (1/1) ... [2022-04-05 02:01:10,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 02:01:10,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 02:01:10,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 02:01:10,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 02:01:10,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10" (1/1) ... [2022-04-05 02:01:10,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:01:10,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:01:10,226 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 02:01:10,236 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 02:01:10,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 02:01:10,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 02:01:10,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 02:01:10,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 02:01:10,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 02:01:10,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 02:01:10,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 02:01:10,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 02:01:10,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-05 02:01:10,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-05 02:01:10,267 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 02:01:10,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 02:01:10,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 02:01:10,267 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 02:01:10,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 02:01:10,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 02:01:10,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 02:01:10,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 02:01:10,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 02:01:10,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 02:01:10,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 02:01:10,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 02:01:10,336 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 02:01:10,338 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 02:01:10,469 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 02:01:10,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 02:01:10,474 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 02:01:10,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:01:10 BoogieIcfgContainer [2022-04-05 02:01:10,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 02:01:10,477 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 02:01:10,477 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 02:01:10,492 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 02:01:10,494 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:01:10" (1/1) ... [2022-04-05 02:01:10,496 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 02:01:10,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:01:10 BasicIcfg [2022-04-05 02:01:10,521 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 02:01:10,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 02:01:10,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 02:01:10,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 02:01:10,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 02:01:09" (1/4) ... [2022-04-05 02:01:10,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b0fb52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:01:10, skipping insertion in model container [2022-04-05 02:01:10,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:01:10" (2/4) ... [2022-04-05 02:01:10,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b0fb52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:01:10, skipping insertion in model container [2022-04-05 02:01:10,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:01:10" (3/4) ... [2022-04-05 02:01:10,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b0fb52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:01:10, skipping insertion in model container [2022-04-05 02:01:10,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:01:10" (4/4) ... [2022-04-05 02:01:10,541 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound20.iJordan [2022-04-05 02:01:10,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 02:01:10,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 02:01:10,602 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 02:01:10,612 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 02:01:10,613 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 02:01:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 02:01:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 02:01:10,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:01:10,649 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:01:10,649 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:01:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:01:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 483266332, now seen corresponding path program 1 times [2022-04-05 02:01:10,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:01:10,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320858082] [2022-04-05 02:01:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:01:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:01:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:01:10,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 02:01:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:01:10,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 02:01:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:01:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 02:01:10,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:01:10,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320858082] [2022-04-05 02:01:10,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320858082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:01:10,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:01:10,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 02:01:10,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118326480] [2022-04-05 02:01:10,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:01:10,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 02:01:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:01:10,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 02:01:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:01:10,940 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 02:01:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:01:11,006 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-04-05 02:01:11,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 02:01:11,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-05 02:01:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:01:11,015 INFO L225 Difference]: With dead ends: 30 [2022-04-05 02:01:11,015 INFO L226 Difference]: Without dead ends: 25 [2022-04-05 02:01:11,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:01:11,020 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:01:11,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:01:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-05 02:01:11,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-05 02:01:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 02:01:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-05 02:01:11,056 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-04-05 02:01:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:01:11,057 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-05 02:01:11,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 02:01:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-05 02:01:11,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-05 02:01:11,059 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:01:11,060 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:01:11,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 02:01:11,060 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:01:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:01:11,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2138426952, now seen corresponding path program 1 times [2022-04-05 02:01:11,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:01:11,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135869933] [2022-04-05 02:01:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:01:11,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:01:11,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:01:11,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580121665] [2022-04-05 02:01:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:01:11,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:01:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:01:11,092 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 02:01:11,107 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 02:01:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:01:11,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 02:01:11,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:01:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 02:01:11,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:01:11,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:01:11,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135869933] [2022-04-05 02:01:11,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:01:11,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580121665] [2022-04-05 02:01:11,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580121665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:01:11,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:01:11,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 02:01:11,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945515760] [2022-04-05 02:01:11,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:01:11,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:01:11,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:01:11,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:01:11,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:01:11,384 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 02:01:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:01:11,471 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-04-05 02:01:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:01:11,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-04-05 02:01:11,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:01:11,473 INFO L225 Difference]: With dead ends: 35 [2022-04-05 02:01:11,473 INFO L226 Difference]: Without dead ends: 34 [2022-04-05 02:01:11,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-05 02:01:11,475 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:01:11,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 78 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:01:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-05 02:01:11,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-05 02:01:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 02:01:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-05 02:01:11,481 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2022-04-05 02:01:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:01:11,482 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-05 02:01:11,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 02:01:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-05 02:01:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 02:01:11,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:01:11,483 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:01:11,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 02:01:11,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:01:11,699 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:01:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:01:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash -554838191, now seen corresponding path program 1 times [2022-04-05 02:01:11,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:01:11,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93455317] [2022-04-05 02:01:11,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:01:11,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:01:11,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:01:11,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702103821] [2022-04-05 02:01:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:01:11,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:01:11,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:01:11,732 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 02:01:11,747 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 02:01:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:01:11,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 02:01:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:01:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 02:01:12,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:01:12,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:01:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93455317] [2022-04-05 02:01:12,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:01:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702103821] [2022-04-05 02:01:12,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702103821] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:01:12,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:01:12,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-05 02:01:12,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113272519] [2022-04-05 02:01:12,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:01:12,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 02:01:12,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:01:12,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 02:01:12,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-05 02:01:12,012 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 02:01:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:01:12,147 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-04-05 02:01:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 02:01:12,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-04-05 02:01:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:01:12,150 INFO L225 Difference]: With dead ends: 43 [2022-04-05 02:01:12,152 INFO L226 Difference]: Without dead ends: 42 [2022-04-05 02:01:12,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:01:12,154 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:01:12,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 88 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:01:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-05 02:01:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2022-04-05 02:01:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 02:01:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-05 02:01:12,159 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2022-04-05 02:01:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:01:12,160 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-05 02:01:12,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 02:01:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-05 02:01:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 02:01:12,161 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:01:12,161 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, 1, 1, 1] [2022-04-05 02:01:12,191 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 02:01:12,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 02:01:12,389 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:01:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:01:12,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1600606598, now seen corresponding path program 1 times [2022-04-05 02:01:12,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:01:12,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026945704] [2022-04-05 02:01:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:01:12,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:01:12,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:01:12,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391594960] [2022-04-05 02:01:12,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:01:12,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:01:12,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:01:12,403 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 02:01:12,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 02:01:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:01:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 02:01:12,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:01:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 02:01:12,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:01:12,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:01:12,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026945704] [2022-04-05 02:01:12,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:01:12,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391594960] [2022-04-05 02:01:12,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391594960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:01:12,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:01:12,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 02:01:12,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287284435] [2022-04-05 02:01:12,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:01:12,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 02:01:12,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:01:12,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 02:01:12,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:01:12,531 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:01:12,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:01:12,547 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-04-05 02:01:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 02:01:12,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-04-05 02:01:12,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:01:12,549 INFO L225 Difference]: With dead ends: 38 [2022-04-05 02:01:12,549 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 02:01:12,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 02:01:12,550 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:01:12,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:01:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 02:01:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 02:01:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 02:01:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-04-05 02:01:12,562 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2022-04-05 02:01:12,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:01:12,563 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-04-05 02:01:12,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:01:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-05 02:01:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 02:01:12,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:01:12,567 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, 1, 1, 1] [2022-04-05 02:01:12,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 02:01:12,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:01:12,768 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:01:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:01:12,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1664896543, now seen corresponding path program 1 times [2022-04-05 02:01:12,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:01:12,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921407023] [2022-04-05 02:01:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:01:12,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:01:12,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:01:12,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520875047] [2022-04-05 02:01:12,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:01:12,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:01:12,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:01:12,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:01:12,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 02:01:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:01:12,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 02:01:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:01:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 02:01:13,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:01:21,778 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~b~0 4294967296))) (or (= (mod c_main_~A~0 4294967296) (mod (+ (* (div .cse0 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) (<= .cse0 (mod c_main_~r~0 4294967296)))) is different from true [2022-04-05 02:01:30,353 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~b~0 2) 4294967296)) (.cse0 (mod c_main_~r~0 4294967296))) (or (not (<= (mod c_main_~b~0 4294967296) .cse0)) (= (mod c_main_~A~0 4294967296) (mod (+ (* (div .cse1 2) (* c_main_~q~0 2)) c_main_~r~0) 4294967296)) (<= .cse1 .cse0))) is different from true [2022-04-05 02:01:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-04-05 02:01:36,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:01:36,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921407023] [2022-04-05 02:01:36,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:01:36,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520875047] [2022-04-05 02:01:36,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520875047] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:01:36,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:01:36,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-04-05 02:01:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759043141] [2022-04-05 02:01:36,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:01:36,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 02:01:36,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:01:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 02:01:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=142, Unknown=3, NotChecked=50, Total=240 [2022-04-05 02:01:36,826 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 02:01:49,787 WARN L232 SmtUtils]: Spent 6.45s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 02:01:51,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:01:53,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:01:56,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:01:58,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:02:00,332 WARN L534 Checker$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 02:02:02,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:02:04,680 WARN L534 Checker$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 02:02:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:02:04,834 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-04-05 02:02:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 02:02:04,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2022-04-05 02:02:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:02:04,836 INFO L225 Difference]: With dead ends: 69 [2022-04-05 02:02:04,836 INFO L226 Difference]: Without dead ends: 67 [2022-04-05 02:02:04,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=62, Invalid=212, Unknown=6, NotChecked=62, Total=342 [2022-04-05 02:02:04,838 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 16 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:02:04,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 154 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 162 Invalid, 7 Unknown, 102 Unchecked, 15.1s Time] [2022-04-05 02:02:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-05 02:02:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-04-05 02:02:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.186046511627907) internal successors, (51), 45 states have internal predecessors, (51), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 02:02:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-04-05 02:02:04,847 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 29 [2022-04-05 02:02:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:02:04,848 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-04-05 02:02:04,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 02:02:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-04-05 02:02:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 02:02:04,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:02:04,850 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:02:04,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 02:02:05,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:02:05,051 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:02:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:02:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1490579311, now seen corresponding path program 2 times [2022-04-05 02:02:05,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:02:05,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692199713] [2022-04-05 02:02:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:02:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:02:05,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:02:05,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254874341] [2022-04-05 02:02:05,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:02:05,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:02:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:02:05,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:02:05,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process