/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 01:51:29,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 01:51:29,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 01:51:29,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 01:51:29,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 01:51:29,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 01:51:29,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 01:51:29,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 01:51:29,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 01:51:29,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 01:51:29,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 01:51:29,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 01:51:29,878 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 01:51:29,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 01:51:29,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 01:51:29,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 01:51:29,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 01:51:29,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 01:51:29,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 01:51:29,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 01:51:29,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 01:51:29,892 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 01:51:29,899 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 01:51:29,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 01:51:29,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 01:51:29,900 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 01:51:29,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 01:51:29,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 01:51:29,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 01:51:29,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 01:51:29,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 01:51:29,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 01:51:29,901 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 01:51:29,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 01:51:29,902 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 01:51:29,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 01:51:29,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 01:51:29,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 01:51:29,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 01:51:29,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 01:51:29,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:51:29,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 01:51:29,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 01:51:29,904 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 01:51:29,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 01:51:30,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 01:51:30,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 01:51:30,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 01:51:30,131 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 01:51:30,134 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 01:51:30,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2022-04-05 01:51:30,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ecfbcd52/55dd5aceadd44a08a065128d58fd8c1e/FLAG66b689d21 [2022-04-05 01:51:30,544 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 01:51:30,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2022-04-05 01:51:30,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ecfbcd52/55dd5aceadd44a08a065128d58fd8c1e/FLAG66b689d21 [2022-04-05 01:51:30,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ecfbcd52/55dd5aceadd44a08a065128d58fd8c1e [2022-04-05 01:51:30,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 01:51:30,569 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 01:51:30,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 01:51:30,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 01:51:30,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 01:51:30,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a30b168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30, skipping insertion in model container [2022-04-05 01:51:30,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 01:51:30,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 01:51:30,736 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_valuebound50.c[525,538] [2022-04-05 01:51:30,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:51:30,783 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 01:51:30,792 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_valuebound50.c[525,538] [2022-04-05 01:51:30,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:51:30,831 INFO L208 MainTranslator]: Completed translation [2022-04-05 01:51:30,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30 WrapperNode [2022-04-05 01:51:30,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 01:51:30,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 01:51:30,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 01:51:30,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 01:51:30,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 01:51:30,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 01:51:30,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 01:51:30,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 01:51:30,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30" (1/1) ... [2022-04-05 01:51:30,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:51:30,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:51:30,891 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 01:51:30,903 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 01:51:30,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 01:51:30,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 01:51:30,927 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 01:51:30,927 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 01:51:30,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 01:51:30,927 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 01:51:30,927 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 01:51:30,927 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 01:51:30,927 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 01:51:30,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 01:51:30,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 01:51:30,927 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 01:51:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 01:51:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 01:51:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 01:51:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 01:51:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 01:51:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 01:51:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 01:51:30,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 01:51:30,973 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 01:51:30,975 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 01:51:31,118 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 01:51:31,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 01:51:31,127 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 01:51:31,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:51:31 BoogieIcfgContainer [2022-04-05 01:51:31,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 01:51:31,136 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 01:51:31,136 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 01:51:31,145 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 01:51:31,148 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:51:31" (1/1) ... [2022-04-05 01:51:31,150 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 01:51:31,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:51:31 BasicIcfg [2022-04-05 01:51:31,188 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 01:51:31,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 01:51:31,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 01:51:31,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 01:51:31,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 01:51:30" (1/4) ... [2022-04-05 01:51:31,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12258f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:51:31, skipping insertion in model container [2022-04-05 01:51:31,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:51:30" (2/4) ... [2022-04-05 01:51:31,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12258f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:51:31, skipping insertion in model container [2022-04-05 01:51:31,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:51:31" (3/4) ... [2022-04-05 01:51:31,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12258f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:51:31, skipping insertion in model container [2022-04-05 01:51:31,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:51:31" (4/4) ... [2022-04-05 01:51:31,193 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound50.cJordan [2022-04-05 01:51:31,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 01:51:31,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 01:51:31,239 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 01:51:31,246 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 01:51:31,247 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 01:51:31,257 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 01:51:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 01:51:31,263 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:51:31,264 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 01:51:31,264 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:51:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:51:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-04-05 01:51:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:51:31,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270915632] [2022-04-05 01:51:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:51:31,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:51:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:31,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:51:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:31,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:51:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:31,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 01:51:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:31,493 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 01:51:31,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:51:31,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270915632] [2022-04-05 01:51:31,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270915632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:51:31,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:51:31,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 01:51:31,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743031001] [2022-04-05 01:51:31,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:51:31,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 01:51:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:51:31,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 01:51:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 01:51:31,533 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 01:51:33,601 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 01:51:35,683 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 01:51:35,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:51:35,691 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-04-05 01:51:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 01:51:35,693 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 01:51:35,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:51:35,698 INFO L225 Difference]: With dead ends: 38 [2022-04-05 01:51:35,698 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 01:51:35,699 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 01:51:35,702 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:51:35,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 10 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2022-04-05 01:51:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 01:51:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-05 01:51:35,727 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 01:51:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-04-05 01:51:35,729 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-04-05 01:51:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:51:35,730 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-04-05 01:51:35,730 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 01:51:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-04-05 01:51:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 01:51:35,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:51:35,731 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 01:51:35,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 01:51:35,732 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:51:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:51:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-04-05 01:51:35,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:51:35,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283515902] [2022-04-05 01:51:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:51:35,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:51:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:35,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:51:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:51:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:35,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 01:51:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:35,958 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 01:51:35,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:51:35,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283515902] [2022-04-05 01:51:35,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283515902] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:51:35,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:51:35,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 01:51:35,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652841074] [2022-04-05 01:51:35,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:51:35,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 01:51:35,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:51:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 01:51:35,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 01:51:35,961 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 01:51:38,187 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 01:51:40,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:51:43,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:51:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:51:44,420 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-04-05 01:51:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 01:51:44,421 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 01:51:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:51:44,423 INFO L225 Difference]: With dead ends: 44 [2022-04-05 01:51:44,423 INFO L226 Difference]: Without dead ends: 44 [2022-04-05 01:51:44,424 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 01:51:44,425 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-04-05 01:51:44,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 55 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 181 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-04-05 01:51:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-05 01:51:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-05 01:51:44,436 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 01:51:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-04-05 01:51:44,439 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 24 [2022-04-05 01:51:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:51:44,441 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-04-05 01:51:44,442 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 01:51:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-04-05 01:51:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 01:51:44,443 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:51:44,444 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 01:51:44,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 01:51:44,444 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:51:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:51:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-04-05 01:51:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:51:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276300085] [2022-04-05 01:51:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:51:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:51:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:44,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:51:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:44,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:51:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:44,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-05 01:51:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:51:44,644 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 01:51:44,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:51:44,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276300085] [2022-04-05 01:51:44,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276300085] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:51:44,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:51:44,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-05 01:51:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944506951] [2022-04-05 01:51:44,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:51:44,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 01:51:44,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:51:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 01:51:44,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 01:51:44,646 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 01:51:47,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:51:49,462 WARN L534 Checker$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 01:51:53,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 01:51:55,417 WARN L534 Checker$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 01:52:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:52:00,507 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-04-05 01:52:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 01:52:00,508 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 01:52:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:52:00,510 INFO L225 Difference]: With dead ends: 63 [2022-04-05 01:52:00,510 INFO L226 Difference]: Without dead ends: 61 [2022-04-05 01:52:00,510 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 01:52:00,511 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 62 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-04-05 01:52:00,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 49 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 206 Invalid, 4 Unknown, 0 Unchecked, 15.8s Time] [2022-04-05 01:52:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-05 01:52:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2022-04-05 01:52:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 33 states have internal predecessors, (36), 24 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 01:52:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2022-04-05 01:52:00,524 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 26 [2022-04-05 01:52:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:52:00,524 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2022-04-05 01:52:00,525 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 01:52:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2022-04-05 01:52:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 01:52:00,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:52:00,526 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 01:52:00,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 01:52:00,526 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:52:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:52:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-04-05 01:52:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:52:00,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081190580] [2022-04-05 01:52:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:52:00,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:52:00,542 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:52:00,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256020022] [2022-04-05 01:52:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:52:00,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:52:00,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:52:00,559 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 01:52:00,568 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 01:52:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:52:00,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 01:52:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:52:00,799 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 01:52:00,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:52:00,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:52:00,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081190580] [2022-04-05 01:52:00,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:52:00,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256020022] [2022-04-05 01:52:00,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256020022] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:52:00,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:52:00,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:52:00,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236176914] [2022-04-05 01:52:00,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:52:00,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:52:00,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:52:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:52:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:52:00,802 INFO L87 Difference]: Start difference. First operand 59 states and 81 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 01:52:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:52:01,376 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2022-04-05 01:52:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:52:01,377 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 01:52:01,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:52:01,378 INFO L225 Difference]: With dead ends: 73 [2022-04-05 01:52:01,378 INFO L226 Difference]: Without dead ends: 52 [2022-04-05 01:52:01,378 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 01:52:01,381 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 01:52:01,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 01:52:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-05 01:52:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-05 01:52:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 01:52:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2022-04-05 01:52:01,387 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 34 [2022-04-05 01:52:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:52:01,387 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2022-04-05 01:52:01,388 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 01:52:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2022-04-05 01:52:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 01:52:01,388 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:52:01,388 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 01:52:01,394 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 01:52:01,594 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 01:52:01,594 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:52:01,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:52:01,595 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-04-05 01:52:01,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:52:01,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980173386] [2022-04-05 01:52:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:52:01,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:52:01,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:52:01,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669460347] [2022-04-05 01:52:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:52:01,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:52:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:52:01,606 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 01:52:01,611 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 01:52:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:52:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:52:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:52:01,816 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 01:52:01,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:52:01,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:52:01,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980173386] [2022-04-05 01:52:01,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:52:01,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669460347] [2022-04-05 01:52:01,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669460347] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:52:01,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:52:01,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:52:01,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302460626] [2022-04-05 01:52:01,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:52:01,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:52:01,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:52:01,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:52:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:52:01,820 INFO L87 Difference]: Start difference. First operand 52 states and 72 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 01:52:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:52:02,711 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2022-04-05 01:52:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:52:02,712 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 01:52:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:52:02,713 INFO L225 Difference]: With dead ends: 60 [2022-04-05 01:52:02,713 INFO L226 Difference]: Without dead ends: 59 [2022-04-05 01:52:02,713 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 01:52:02,713 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 01:52:02,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 01:52:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-05 01:52:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-04-05 01:52:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 01:52:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2022-04-05 01:52:02,719 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 36 [2022-04-05 01:52:02,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:52:02,719 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2022-04-05 01:52:02,720 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 01:52:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2022-04-05 01:52:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-05 01:52:02,721 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:52:02,721 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 01:52:02,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-05 01:52:02,924 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 01:52:02,925 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:52:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:52:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-04-05 01:52:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:52:02,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292358395] [2022-04-05 01:52:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:52:02,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:52:02,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:52:02,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878575476] [2022-04-05 01:52:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:52:02,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:52:02,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:52:02,951 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 01:52:02,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process