/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/hard-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 19:46:42,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 19:46:42,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 19:46:42,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 19:46:42,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 19:46:42,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 19:46:42,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 19:46:42,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 19:46:42,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 19:46:42,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 19:46:42,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 19:46:42,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 19:46:42,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 19:46:42,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 19:46:42,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 19:46:42,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 19:46:42,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 19:46:42,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 19:46:42,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 19:46:42,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 19:46:42,245 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 19:46:42,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 19:46:42,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 19:46:42,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 19:46:42,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 19:46:42,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 19:46:42,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 19:46:42,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 19:46:42,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 19:46:42,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 19:46:42,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 19:46:42,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 19:46:42,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 19:46:42,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 19:46:42,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 19:46:42,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 19:46:42,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 19:46:42,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 19:46:42,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:46:42,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 19:46:42,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 19:46:42,263 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 19:46:42,264 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 19:46:42,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 19:46:42,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 19:46:42,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 19:46:42,411 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 19:46:42,413 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 19:46:42,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-03-18 19:46:42,462 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c569b0e11/fbcf66abf6674bb7ae0e49474b04cb85/FLAGa2cee776a [2022-03-18 19:46:42,805 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 19:46:42,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2022-03-18 19:46:42,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c569b0e11/fbcf66abf6674bb7ae0e49474b04cb85/FLAGa2cee776a [2022-03-18 19:46:42,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c569b0e11/fbcf66abf6674bb7ae0e49474b04cb85 [2022-03-18 19:46:42,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 19:46:42,819 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 19:46:42,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 19:46:42,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 19:46:42,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 19:46:42,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:46:42" (1/1) ... [2022-03-18 19:46:42,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db88e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:42, skipping insertion in model container [2022-03-18 19:46:42,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:46:42" (1/1) ... [2022-03-18 19:46:42,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 19:46:42,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 19:46:43,045 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/hard-u_valuebound1.c[537,550] [2022-03-18 19:46:43,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:46:43,059 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 19:46:43,071 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/hard-u_valuebound1.c[537,550] [2022-03-18 19:46:43,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:46:43,097 INFO L208 MainTranslator]: Completed translation [2022-03-18 19:46:43,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43 WrapperNode [2022-03-18 19:46:43,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 19:46:43,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 19:46:43,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 19:46:43,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 19:46:43,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43" (1/1) ... [2022-03-18 19:46:43,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43" (1/1) ... [2022-03-18 19:46:43,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43" (1/1) ... [2022-03-18 19:46:43,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43" (1/1) ... [2022-03-18 19:46:43,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43" (1/1) ... [2022-03-18 19:46:43,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43" (1/1) ... [2022-03-18 19:46:43,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43" (1/1) ... [2022-03-18 19:46:43,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 19:46:43,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 19:46:43,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 19:46:43,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 19:46:43,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43" (1/1) ... [2022-03-18 19:46:43,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:46:43,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:46:43,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 19:46:43,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 19:46:43,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 19:46:43,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 19:46:43,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 19:46:43,209 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 19:46:43,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 19:46:43,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 19:46:43,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 19:46:43,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 19:46:43,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 19:46:43,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 19:46:43,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 19:46:43,211 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 19:46:43,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 19:46:43,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 19:46:43,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 19:46:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 19:46:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 19:46:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 19:46:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 19:46:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 19:46:43,259 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 19:46:43,260 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 19:46:43,406 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 19:46:43,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 19:46:43,410 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 19:46:43,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:46:43 BoogieIcfgContainer [2022-03-18 19:46:43,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 19:46:43,412 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 19:46:43,412 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 19:46:43,424 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 19:46:43,427 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:46:43" (1/1) ... [2022-03-18 19:46:43,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:46:43 BasicIcfg [2022-03-18 19:46:43,452 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 19:46:43,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 19:46:43,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 19:46:43,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 19:46:43,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 07:46:42" (1/4) ... [2022-03-18 19:46:43,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633eda31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:46:43, skipping insertion in model container [2022-03-18 19:46:43,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:46:43" (2/4) ... [2022-03-18 19:46:43,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633eda31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:46:43, skipping insertion in model container [2022-03-18 19:46:43,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:46:43" (3/4) ... [2022-03-18 19:46:43,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633eda31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:46:43, skipping insertion in model container [2022-03-18 19:46:43,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:46:43" (4/4) ... [2022-03-18 19:46:43,457 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.cJordan [2022-03-18 19:46:43,480 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 19:46:43,480 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 19:46:43,525 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 19:46:43,529 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 19:46:43,530 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 19:46:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 19:46:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 19:46:43,580 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:46:43,581 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:46:43,581 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:46:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:46:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-03-18 19:46:43,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:46:43,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329329658] [2022-03-18 19:46:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:46:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:43,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:46:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:43,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:46:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:43,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 19:46:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:43,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 19:46:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:46:43,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:46:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329329658] [2022-03-18 19:46:43,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329329658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:46:43,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:46:43,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 19:46:43,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961148624] [2022-03-18 19:46:43,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:46:43,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 19:46:43,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:46:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 19:46:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:46:43,852 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:46:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:46:43,915 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-18 19:46:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 19:46:43,917 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 19:46:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:46:43,924 INFO L225 Difference]: With dead ends: 38 [2022-03-18 19:46:43,924 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 19:46:43,925 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:46:43,929 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:46:43,930 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:46:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 19:46:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 19:46:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 19:46:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-18 19:46:43,956 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-18 19:46:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:46:43,957 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-18 19:46:43,958 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:46:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-18 19:46:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 19:46:43,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:46:43,960 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:46:43,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 19:46:43,960 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:46:43,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:46:43,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-03-18 19:46:43,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:46:43,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840160014] [2022-03-18 19:46:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:43,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:46:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:46:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:46:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 19:46:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 19:46:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:46:44,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:46:44,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840160014] [2022-03-18 19:46:44,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840160014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:46:44,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:46:44,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:46:44,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008672922] [2022-03-18 19:46:44,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:46:44,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:46:44,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:46:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:46:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:46:44,127 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 19:46:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:46:44,357 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-03-18 19:46:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 19:46:44,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-18 19:46:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:46:44,375 INFO L225 Difference]: With dead ends: 44 [2022-03-18 19:46:44,376 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 19:46:44,379 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:46:44,380 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 19:46:44,380 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 19:46:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 19:46:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-18 19:46:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 19:46:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-18 19:46:44,392 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-18 19:46:44,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:46:44,392 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-18 19:46:44,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 19:46:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-18 19:46:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 19:46:44,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:46:44,394 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:46:44,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 19:46:44,394 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:46:44,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:46:44,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-03-18 19:46:44,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:46:44,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12785117] [2022-03-18 19:46:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:44,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:46:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:46:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:46:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 19:46:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 19:46:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 19:46:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:46:44,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:46:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12785117] [2022-03-18 19:46:44,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12785117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:46:44,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:46:44,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:46:44,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108025369] [2022-03-18 19:46:44,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:46:44,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:46:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:46:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:46:44,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:46:44,602 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 19:46:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:46:44,787 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-03-18 19:46:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 19:46:44,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 33 [2022-03-18 19:46:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:46:44,790 INFO L225 Difference]: With dead ends: 48 [2022-03-18 19:46:44,790 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 19:46:44,790 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:46:44,794 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:46:44,795 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:46:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 19:46:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-18 19:46:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 19:46:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-18 19:46:44,809 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-18 19:46:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:46:44,809 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-18 19:46:44,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 19:46:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-18 19:46:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 19:46:44,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:46:44,811 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:46:44,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 19:46:44,811 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:46:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:46:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-03-18 19:46:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:46:44,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899599771] [2022-03-18 19:46:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:44,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:46:44,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:46:44,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808061005] [2022-03-18 19:46:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:44,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:46:44,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:46:44,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:46:44,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 19:46:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:44,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:46:44,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:46:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 19:46:45,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:46:45,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:46:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899599771] [2022-03-18 19:46:45,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:46:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808061005] [2022-03-18 19:46:45,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808061005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:46:45,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:46:45,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:46:45,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815997538] [2022-03-18 19:46:45,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:46:45,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:46:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:46:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:46:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:46:45,099 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 19:46:47,140 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 [] [2022-03-18 19:46:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:46:47,332 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-03-18 19:46:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:46:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-18 19:46:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:46:47,333 INFO L225 Difference]: With dead ends: 56 [2022-03-18 19:46:47,333 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 19:46:47,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:46:47,334 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 19:46:47,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 19:46:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 19:46:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 19:46:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 19:46:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-03-18 19:46:47,338 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-03-18 19:46:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:46:47,339 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-03-18 19:46:47,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 19:46:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-03-18 19:46:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 19:46:47,342 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:46:47,342 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2022-03-18 19:46:47,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 19:46:47,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:46:47,552 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:46:47,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:46:47,552 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-03-18 19:46:47,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:46:47,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025256479] [2022-03-18 19:46:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:47,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:46:47,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:46:47,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146372591] [2022-03-18 19:46:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:47,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:46:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:46:47,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:46:47,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 19:46:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:47,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 19:46:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:46:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 19:46:47,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:46:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 19:46:48,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:46:48,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025256479] [2022-03-18 19:46:48,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:46:48,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146372591] [2022-03-18 19:46:48,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146372591] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 19:46:48,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:46:48,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-18 19:46:48,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992454791] [2022-03-18 19:46:48,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:46:48,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:46:48,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:46:48,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:46:48,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:46:48,034 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 19:46:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:46:48,107 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-03-18 19:46:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:46:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-18 19:46:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:46:48,109 INFO L225 Difference]: With dead ends: 66 [2022-03-18 19:46:48,109 INFO L226 Difference]: Without dead ends: 66 [2022-03-18 19:46:48,109 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:46:48,109 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:46:48,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:46:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-18 19:46:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-18 19:46:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 19:46:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-03-18 19:46:48,114 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-03-18 19:46:48,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:46:48,114 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-03-18 19:46:48,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 19:46:48,114 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-03-18 19:46:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 19:46:48,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:46:48,115 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 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] [2022-03-18 19:46:48,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 19:46:48,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:46:48,327 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:46:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:46:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-03-18 19:46:48,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:46:48,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9003000] [2022-03-18 19:46:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:46:48,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:46:48,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852180093] [2022-03-18 19:46:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:48,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:46:48,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:46:48,336 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:46:48,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 19:46:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:48,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 19:46:48,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:46:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-18 19:46:48,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:46:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 19:46:48,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:46:48,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9003000] [2022-03-18 19:46:48,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:46:48,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852180093] [2022-03-18 19:46:48,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852180093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:46:48,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:46:48,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 19:46:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724422780] [2022-03-18 19:46:48,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:46:48,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 19:46:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:46:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 19:46:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:46:48,912 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 19:46:51,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 19:46:53,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:46:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:46:53,642 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-03-18 19:46:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 19:46:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 55 [2022-03-18 19:46:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:46:53,645 INFO L225 Difference]: With dead ends: 84 [2022-03-18 19:46:53,645 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 19:46:53,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:46:53,645 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-18 19:46:53,646 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 168 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 158 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-03-18 19:46:53,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 19:46:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-18 19:46:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 50 states have internal predecessors, (56), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 19:46:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-03-18 19:46:53,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 55 [2022-03-18 19:46:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:46:53,651 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-03-18 19:46:53,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 19:46:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-03-18 19:46:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 19:46:53,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:46:53,669 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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, 1, 1, 1] [2022-03-18 19:46:53,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 19:46:53,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:46:53,873 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:46:53,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:46:53,874 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-03-18 19:46:53,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:46:53,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508757796] [2022-03-18 19:46:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:53,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:46:53,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:46:53,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164841627] [2022-03-18 19:46:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:46:53,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:46:53,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:46:53,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:46:53,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 19:46:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:46:53,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 19:46:53,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:46:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-18 19:46:54,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:46:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 19:46:55,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:46:55,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508757796] [2022-03-18 19:46:55,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:46:55,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164841627] [2022-03-18 19:46:55,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164841627] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 19:46:55,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:46:55,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-18 19:46:55,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101771347] [2022-03-18 19:46:55,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:46:55,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:46:55,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:46:55,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:46:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:46:55,912 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 19:46:58,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:47:00,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:47:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:47:00,665 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-03-18 19:47:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:47:00,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-03-18 19:47:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:47:00,667 INFO L225 Difference]: With dead ends: 88 [2022-03-18 19:47:00,667 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 19:47:00,667 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:47:00,667 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-18 19:47:00,668 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 162 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-03-18 19:47:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 19:47:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-18 19:47:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 19:47:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-03-18 19:47:00,673 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 56 [2022-03-18 19:47:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:47:00,673 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-03-18 19:47:00,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-18 19:47:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-03-18 19:47:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 19:47:00,674 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:47:00,674 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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, 1] [2022-03-18 19:47:00,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 19:47:00,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:47:00,887 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:47:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:47:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2022-03-18 19:47:00,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:47:00,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823395269] [2022-03-18 19:47:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:47:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:47:00,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:47:00,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186312746] [2022-03-18 19:47:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:47:00,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:47:00,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:47:00,917 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:47:00,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process