/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-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 19:32:03,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 19:32:03,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 19:32:03,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 19:32:03,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 19:32:03,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 19:32:03,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 19:32:03,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 19:32:03,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 19:32:03,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 19:32:03,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 19:32:03,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 19:32:03,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 19:32:03,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 19:32:03,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 19:32:03,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 19:32:03,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 19:32:03,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 19:32:03,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 19:32:03,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 19:32:03,138 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 19:32:03,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 19:32:03,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 19:32:03,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 19:32:03,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 19:32:03,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 19:32:03,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 19:32:03,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 19:32:03,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 19:32:03,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 19:32:03,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 19:32:03,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 19:32:03,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 19:32:03,164 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 19:32:03,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 19:32:03,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 19:32:03,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 19:32:03,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 19:32:03,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 19:32:03,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 19:32:03,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 19:32:03,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 19:32:03,165 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 19:32:03,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 19:32:03,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 19:32:03,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 19:32:03,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 19:32:03,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 19:32:03,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:32:03,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 19:32:03,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 19:32:03,166 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 19:32:03,166 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 19:32:03,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 19:32:03,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 19:32:03,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 19:32:03,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 19:32:03,393 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 19:32:03,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2022-03-18 19:32:03,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bbec36b8/65b3c9d10a4f42c3a07c6418e36df2cd/FLAGd95467d67 [2022-03-18 19:32:03,821 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 19:32:03,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2022-03-18 19:32:03,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bbec36b8/65b3c9d10a4f42c3a07c6418e36df2cd/FLAGd95467d67 [2022-03-18 19:32:03,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bbec36b8/65b3c9d10a4f42c3a07c6418e36df2cd [2022-03-18 19:32:03,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 19:32:03,840 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 19:32:03,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 19:32:03,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 19:32:03,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 19:32:03,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:32:03" (1/1) ... [2022-03-18 19:32:03,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b902e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:03, skipping insertion in model container [2022-03-18 19:32:03,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:32:03" (1/1) ... [2022-03-18 19:32:03,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 19:32:03,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 19:32:04,011 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-ll_unwindbound5.c[538,551] [2022-03-18 19:32:04,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:32:04,044 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 19:32:04,052 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-ll_unwindbound5.c[538,551] [2022-03-18 19:32:04,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:32:04,068 INFO L208 MainTranslator]: Completed translation [2022-03-18 19:32:04,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04 WrapperNode [2022-03-18 19:32:04,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 19:32:04,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 19:32:04,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 19:32:04,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 19:32:04,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04" (1/1) ... [2022-03-18 19:32:04,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04" (1/1) ... [2022-03-18 19:32:04,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04" (1/1) ... [2022-03-18 19:32:04,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04" (1/1) ... [2022-03-18 19:32:04,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04" (1/1) ... [2022-03-18 19:32:04,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04" (1/1) ... [2022-03-18 19:32:04,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04" (1/1) ... [2022-03-18 19:32:04,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 19:32:04,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 19:32:04,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 19:32:04,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 19:32:04,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04" (1/1) ... [2022-03-18 19:32:04,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:32:04,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:04,140 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 19:32:04,144 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 19:32:04,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 19:32:04,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 19:32:04,165 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 19:32:04,165 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 19:32:04,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 19:32:04,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 19:32:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 19:32:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 19:32:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 19:32:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 19:32:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 19:32:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 19:32:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 19:32:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 19:32:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 19:32:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 19:32:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 19:32:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 19:32:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 19:32:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 19:32:04,207 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 19:32:04,208 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 19:32:04,375 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 19:32:04,379 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 19:32:04,379 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 19:32:04,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:32:04 BoogieIcfgContainer [2022-03-18 19:32:04,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 19:32:04,381 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 19:32:04,381 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 19:32:04,396 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 19:32:04,398 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:32:04" (1/1) ... [2022-03-18 19:32:04,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:32:04 BasicIcfg [2022-03-18 19:32:04,427 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 19:32:04,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 19:32:04,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 19:32:04,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 19:32:04,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 07:32:03" (1/4) ... [2022-03-18 19:32:04,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3be064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:32:04, skipping insertion in model container [2022-03-18 19:32:04,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:32:04" (2/4) ... [2022-03-18 19:32:04,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3be064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:32:04, skipping insertion in model container [2022-03-18 19:32:04,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:32:04" (3/4) ... [2022-03-18 19:32:04,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3be064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:32:04, skipping insertion in model container [2022-03-18 19:32:04,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:32:04" (4/4) ... [2022-03-18 19:32:04,432 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.cJordan [2022-03-18 19:32:04,446 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 19:32:04,446 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 19:32:04,487 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 19:32:04,491 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 19:32:04,491 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 19:32:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 19:32:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 19:32:04,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:04,510 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:32:04,510 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:04,514 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-03-18 19:32:04,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:04,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802403281] [2022-03-18 19:32:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:04,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:32:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:04,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:32:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:32:04,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:04,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802403281] [2022-03-18 19:32:04,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802403281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:32:04,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:32:04,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 19:32:04,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51045001] [2022-03-18 19:32:04,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:32:04,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 19:32:04,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 19:32:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:32:04,717 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 19:32:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:04,795 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-18 19:32:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 19:32:04,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-18 19:32:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:04,806 INFO L225 Difference]: With dead ends: 38 [2022-03-18 19:32:04,806 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 19:32:04,807 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 19:32:04,810 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:04,811 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:32:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 19:32:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-18 19:32:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 19:32:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-18 19:32:04,841 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-18 19:32:04,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:04,841 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-18 19:32:04,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 19:32:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-18 19:32:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 19:32:04,842 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:04,843 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:32:04,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 19:32:04,843 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:04,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-03-18 19:32:04,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:04,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806118422] [2022-03-18 19:32:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:04,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:04,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:04,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:32:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:04,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:32:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:32:04,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806118422] [2022-03-18 19:32:04,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806118422] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:32:04,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:32:04,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:32:04,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869328208] [2022-03-18 19:32:04,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:32:04,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:32:04,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:04,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:32:04,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:32:04,978 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 19:32:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:05,135 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-03-18 19:32:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 19:32:05,136 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-18 19:32:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:05,137 INFO L225 Difference]: With dead ends: 45 [2022-03-18 19:32:05,137 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 19:32:05,141 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:32:05,143 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:05,143 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:32:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 19:32:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-18 19:32:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 19:32:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-18 19:32:05,153 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-18 19:32:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:05,154 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-18 19:32:05,154 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 19:32:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-18 19:32:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 19:32:05,155 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:05,155 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:32:05,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 19:32:05,155 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-03-18 19:32:05,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:05,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111867908] [2022-03-18 19:32:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:05,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:05,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:32:05,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251202108] [2022-03-18 19:32:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:05,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:05,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:05,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:32:05,184 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 19:32:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 19:32:05,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:32:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:32:05,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:32:05,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:05,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111867908] [2022-03-18 19:32:05,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:32:05,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251202108] [2022-03-18 19:32:05,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251202108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:32:05,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:32:05,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 19:32:05,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218322071] [2022-03-18 19:32:05,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:32:05,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 19:32:05,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 19:32:05,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 19:32:05,325 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 19:32:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:05,332 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-03-18 19:32:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 19:32:05,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-18 19:32:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:05,333 INFO L225 Difference]: With dead ends: 38 [2022-03-18 19:32:05,333 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 19:32:05,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 19:32:05,334 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:05,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:32:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 19:32:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-18 19:32:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 19:32:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-18 19:32:05,338 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-18 19:32:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:05,338 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-18 19:32:05,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 19:32:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-18 19:32:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 19:32:05,339 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:05,339 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:32:05,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 19:32:05,556 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:05,556 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-03-18 19:32:05,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:05,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184807792] [2022-03-18 19:32:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:05,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:05,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 19:32:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 19:32:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:05,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 19:32:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 19:32:05,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:05,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184807792] [2022-03-18 19:32:05,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184807792] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:32:05,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:32:05,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:32:05,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647132876] [2022-03-18 19:32:05,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:32:05,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:32:05,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:32:05,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:32:05,653 INFO L87 Difference]: Start difference. First operand 38 states and 47 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 19:32:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:05,784 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-03-18 19:32:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 19:32:05,790 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 19:32:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:05,791 INFO L225 Difference]: With dead ends: 50 [2022-03-18 19:32:05,791 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 19:32:05,791 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:32:05,792 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:05,792 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:32:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 19:32:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-18 19:32:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 19:32:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-18 19:32:05,796 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-18 19:32:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:05,796 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-18 19:32:05,797 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 19:32:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-18 19:32:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 19:32:05,797 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:05,797 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:32:05,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 19:32:05,797 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-03-18 19:32:05,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:05,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272632819] [2022-03-18 19:32:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:05,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:05,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:32:05,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028919735] [2022-03-18 19:32:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:05,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:05,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:05,807 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 19:32:05,815 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 19:32:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:05,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:32:05,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:32:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:32:05,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:32:05,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272632819] [2022-03-18 19:32:05,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:32:05,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028919735] [2022-03-18 19:32:05,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028919735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:32:05,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:32:05,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:32:05,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86615244] [2022-03-18 19:32:05,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:32:05,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:32:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:32:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:32:05,951 INFO L87 Difference]: Start difference. First operand 42 states and 50 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:32:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:06,011 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-18 19:32:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:32:06,012 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 19:32:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:06,012 INFO L225 Difference]: With dead ends: 57 [2022-03-18 19:32:06,012 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 19:32:06,012 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 19:32:06,013 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:06,013 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:32:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 19:32:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-18 19:32:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 19:32:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-03-18 19:32:06,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-03-18 19:32:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:06,018 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-03-18 19:32:06,018 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 19:32:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-03-18 19:32:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 19:32:06,018 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:06,019 INFO L500 BasicCegarLoop]: trace histogram [4, 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 19:32:06,038 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 19:32:06,235 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 19:32:06,235 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-03-18 19:32:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:06,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563396805] [2022-03-18 19:32:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:06,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:32:06,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651548654] [2022-03-18 19:32:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:06,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:06,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:06,245 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 19:32:06,246 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 19:32:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:32:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:32:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:32:06,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:32:06,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:06,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563396805] [2022-03-18 19:32:06,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:32:06,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651548654] [2022-03-18 19:32:06,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651548654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:32:06,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:32:06,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:32:06,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759132558] [2022-03-18 19:32:06,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:32:06,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:32:06,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:32:06,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:32:06,343 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 19:32:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:06,360 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-03-18 19:32:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:32:06,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-18 19:32:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:06,361 INFO L225 Difference]: With dead ends: 69 [2022-03-18 19:32:06,361 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 19:32:06,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:32:06,362 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:06,362 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:32:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 19:32:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-18 19:32:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 19:32:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-03-18 19:32:06,367 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-03-18 19:32:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:06,367 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-03-18 19:32:06,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 19:32:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-03-18 19:32:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 19:32:06,368 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:06,368 INFO L500 BasicCegarLoop]: trace histogram [4, 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 19:32:06,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 19:32:06,570 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 19:32:06,570 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:06,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-03-18 19:32:06,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:06,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205387447] [2022-03-18 19:32:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:06,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:06,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:32:06,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980489786] [2022-03-18 19:32:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:06,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:06,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:06,607 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 19:32:06,612 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 19:32:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:06,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 19:32:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:32:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:32:06,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:32:06,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205387447] [2022-03-18 19:32:06,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:32:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980489786] [2022-03-18 19:32:06,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980489786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:32:06,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:32:06,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 19:32:06,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862936657] [2022-03-18 19:32:06,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:32:06,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:32:06,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:06,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:32:06,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 19:32:06,810 INFO L87 Difference]: Start difference. First operand 68 states and 78 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, (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) [2022-03-18 19:32:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:06,871 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-03-18 19:32:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 19:32:06,871 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, (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 [2022-03-18 19:32:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:06,872 INFO L225 Difference]: With dead ends: 72 [2022-03-18 19:32:06,872 INFO L226 Difference]: Without dead ends: 58 [2022-03-18 19:32:06,872 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 19:32:06,872 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:06,873 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 184 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:32:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-18 19:32:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-18 19:32:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 19:32:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-18 19:32:06,877 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2022-03-18 19:32:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:06,877 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-18 19:32:06,877 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, (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) [2022-03-18 19:32:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-18 19:32:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 19:32:06,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:06,878 INFO L500 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2022-03-18 19:32:06,894 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 19:32:07,094 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 19:32:07,094 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:07,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-03-18 19:32:07,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458470811] [2022-03-18 19:32:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:07,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:07,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:32:07,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524179111] [2022-03-18 19:32:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:07,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:07,114 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 19:32:07,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 19:32:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:32:07,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:32:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:32:07,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:32:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 19:32:07,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:07,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458470811] [2022-03-18 19:32:07,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:32:07,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524179111] [2022-03-18 19:32:07,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524179111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:32:07,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:32:07,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 19:32:07,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007507950] [2022-03-18 19:32:07,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:32:07,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 19:32:07,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 19:32:07,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 19:32:07,322 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 19:32:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:07,397 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2022-03-18 19:32:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 19:32:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-03-18 19:32:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:07,398 INFO L225 Difference]: With dead ends: 109 [2022-03-18 19:32:07,398 INFO L226 Difference]: Without dead ends: 109 [2022-03-18 19:32:07,398 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:32:07,398 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 60 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:07,399 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:32:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-18 19:32:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-03-18 19:32:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-18 19:32:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-03-18 19:32:07,405 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 38 [2022-03-18 19:32:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:07,405 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-03-18 19:32:07,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-18 19:32:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-03-18 19:32:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 19:32:07,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:07,406 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:32:07,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 19:32:07,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:07,625 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:07,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-03-18 19:32:07,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:07,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616894378] [2022-03-18 19:32:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:07,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:07,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:32:07,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143061936] [2022-03-18 19:32:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:07,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:07,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:07,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:32:07,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 19:32:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:07,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 19:32:07,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:32:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 19:32:07,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:32:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 19:32:07,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:07,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616894378] [2022-03-18 19:32:07,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:32:07,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143061936] [2022-03-18 19:32:07,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143061936] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 19:32:07,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:32:07,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 19:32:07,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970416790] [2022-03-18 19:32:07,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:32:08,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:32:08,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:32:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:32:08,001 INFO L87 Difference]: Start difference. First operand 103 states and 120 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) [2022-03-18 19:32:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:08,035 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-03-18 19:32:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:32:08,035 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 46 [2022-03-18 19:32:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:08,038 INFO L225 Difference]: With dead ends: 118 [2022-03-18 19:32:08,038 INFO L226 Difference]: Without dead ends: 118 [2022-03-18 19:32:08,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:32:08,042 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:08,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:32:08,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-18 19:32:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-03-18 19:32:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 76 states have internal predecessors, (85), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-18 19:32:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-03-18 19:32:08,058 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 46 [2022-03-18 19:32:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:08,058 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-03-18 19:32:08,058 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) [2022-03-18 19:32:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-03-18 19:32:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 19:32:08,059 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:08,059 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 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] [2022-03-18 19:32:08,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 19:32:08,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:08,260 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2022-03-18 19:32:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:08,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181268624] [2022-03-18 19:32:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:08,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:08,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:32:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102619596] [2022-03-18 19:32:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:08,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:08,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:32:08,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 19:32:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:08,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 19:32:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:32:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 19:32:08,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:32:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 19:32:08,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181268624] [2022-03-18 19:32:08,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:32:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102619596] [2022-03-18 19:32:08,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102619596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:32:08,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:32:08,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-18 19:32:08,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28426148] [2022-03-18 19:32:08,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:32:08,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 19:32:08,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:08,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 19:32:08,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-18 19:32:08,451 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 19:32:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:08,511 INFO L93 Difference]: Finished difference Result 157 states and 180 transitions. [2022-03-18 19:32:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 19:32:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) Word has length 54 [2022-03-18 19:32:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:08,513 INFO L225 Difference]: With dead ends: 157 [2022-03-18 19:32:08,513 INFO L226 Difference]: Without dead ends: 157 [2022-03-18 19:32:08,513 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:32:08,513 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:08,513 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 191 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:32:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-18 19:32:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2022-03-18 19:32:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 102 states have internal predecessors, (113), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-18 19:32:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 177 transitions. [2022-03-18 19:32:08,519 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 177 transitions. Word has length 54 [2022-03-18 19:32:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:08,520 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 177 transitions. [2022-03-18 19:32:08,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 7 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 5 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 19:32:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 177 transitions. [2022-03-18 19:32:08,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 19:32:08,524 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:08,524 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 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] [2022-03-18 19:32:08,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 19:32:08,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:08,743 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2022-03-18 19:32:08,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:08,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208031845] [2022-03-18 19:32:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:08,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:08,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:32:08,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151190308] [2022-03-18 19:32:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:08,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:08,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:08,750 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:32:08,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 19:32:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:08,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 19:32:08,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:32:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 19:32:09,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:32:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 19:32:09,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:32:09,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208031845] [2022-03-18 19:32:09,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:32:09,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151190308] [2022-03-18 19:32:09,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151190308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:32:09,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:32:09,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-18 19:32:09,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944580594] [2022-03-18 19:32:09,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:32:09,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 19:32:09,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:32:09,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 19:32:09,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:32:09,282 INFO L87 Difference]: Start difference. First operand 152 states and 177 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 19:32:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:32:09,465 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2022-03-18 19:32:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 19:32:09,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 54 [2022-03-18 19:32:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:32:09,467 INFO L225 Difference]: With dead ends: 205 [2022-03-18 19:32:09,467 INFO L226 Difference]: Without dead ends: 203 [2022-03-18 19:32:09,467 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-18 19:32:09,467 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 51 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:32:09,468 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 288 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:32:09,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-18 19:32:09,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 188. [2022-03-18 19:32:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 123 states have (on average 1.2032520325203253) internal successors, (148), 128 states have internal predecessors, (148), 42 states have call successors, (42), 24 states have call predecessors, (42), 22 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-18 19:32:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2022-03-18 19:32:09,474 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 54 [2022-03-18 19:32:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:32:09,474 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2022-03-18 19:32:09,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 19:32:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2022-03-18 19:32:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 19:32:09,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:32:09,475 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 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] [2022-03-18 19:32:09,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 19:32:09,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 19:32:09,691 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:32:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:32:09,691 INFO L85 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2022-03-18 19:32:09,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:32:09,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018299849] [2022-03-18 19:32:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:09,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:32:09,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:32:09,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110531658] [2022-03-18 19:32:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:32:09,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:32:09,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:32:09,706 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:32:09,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 19:32:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:32:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 19:32:09,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:32:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-18 19:32:10,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:32:47,909 WARN L232 SmtUtils]: Spent 22.00s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:34:07,886 WARN L232 SmtUtils]: Spent 25.23s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:35:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-18 19:35:32,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:35:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018299849] [2022-03-18 19:35:32,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:35:32,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110531658] [2022-03-18 19:35:32,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110531658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:35:32,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:35:32,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-18 19:35:32,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616894701] [2022-03-18 19:35:32,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:35:32,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 19:35:32,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:35:32,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 19:35:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-18 19:35:32,253 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 19:35:34,315 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 19:35:38,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:35:40,441 WARN L534 Checker$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 19:35:52,243 WARN L232 SmtUtils]: Spent 10.72s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:35:54,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:35:58,061 WARN L534 Checker$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 19:36:25,641 WARN L232 SmtUtils]: Spent 25.77s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:36:32,130 WARN L232 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 58 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:36:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:36:39,551 INFO L93 Difference]: Finished difference Result 220 states and 271 transitions. [2022-03-18 19:36:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 19:36:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 68 [2022-03-18 19:36:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:36:39,553 INFO L225 Difference]: With dead ends: 220 [2022-03-18 19:36:39,553 INFO L226 Difference]: Without dead ends: 220 [2022-03-18 19:36:39,554 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 101.0s TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2022-03-18 19:36:39,554 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 158 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-03-18 19:36:39,554 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 294 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 409 Invalid, 5 Unknown, 0 Unchecked, 15.7s Time] [2022-03-18 19:36:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-18 19:36:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 193. [2022-03-18 19:36:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 129 states have (on average 1.178294573643411) internal successors, (152), 134 states have internal predecessors, (152), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-18 19:36:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2022-03-18 19:36:39,561 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 68 [2022-03-18 19:36:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:36:39,561 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2022-03-18 19:36:39,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-18 19:36:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2022-03-18 19:36:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 19:36:39,562 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:36:39,562 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-03-18 19:36:39,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 19:36:39,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:36:39,766 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:36:39,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:36:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2022-03-18 19:36:39,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:36:39,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415014272] [2022-03-18 19:36:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:39,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:36:39,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:36:39,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809337324] [2022-03-18 19:36:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:39,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:36:39,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:36:39,776 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:36:39,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 19:36:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:36:39,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 19:36:39,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:36:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-18 19:36:40,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:36:42,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:36:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415014272] [2022-03-18 19:36:42,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:36:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809337324] [2022-03-18 19:36:42,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809337324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 19:36:42,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:36:42,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-18 19:36:42,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681719360] [2022-03-18 19:36:42,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 19:36:42,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 19:36:42,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:36:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 19:36:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-18 19:36:42,759 INFO L87 Difference]: Start difference. First operand 193 states and 227 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 19:36:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:36:43,417 INFO L93 Difference]: Finished difference Result 227 states and 275 transitions. [2022-03-18 19:36:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 19:36:43,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2022-03-18 19:36:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:36:43,419 INFO L225 Difference]: With dead ends: 227 [2022-03-18 19:36:43,419 INFO L226 Difference]: Without dead ends: 225 [2022-03-18 19:36:43,419 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-18 19:36:43,419 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 32 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 19:36:43,419 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 401 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 19:36:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-18 19:36:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 209. [2022-03-18 19:36:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 144 states have internal predecessors, (164), 44 states have call successors, (44), 27 states have call predecessors, (44), 25 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-18 19:36:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 249 transitions. [2022-03-18 19:36:43,425 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 249 transitions. Word has length 79 [2022-03-18 19:36:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:36:43,426 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 249 transitions. [2022-03-18 19:36:43,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-18 19:36:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 249 transitions. [2022-03-18 19:36:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-18 19:36:43,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:36:43,427 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:36:43,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 19:36:43,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 19:36:43,628 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:36:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:36:43,628 INFO L85 PathProgramCache]: Analyzing trace with hash -911798983, now seen corresponding path program 2 times [2022-03-18 19:36:43,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:36:43,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489106891] [2022-03-18 19:36:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:43,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:36:43,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:36:43,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221843424] [2022-03-18 19:36:43,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:36:43,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:36:43,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:36:43,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:36:43,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 19:36:43,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:36:43,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:36:43,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:36:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:36:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-18 19:36:43,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:36:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-18 19:36:43,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:36:43,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489106891] [2022-03-18 19:36:43,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:36:43,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221843424] [2022-03-18 19:36:43,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221843424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:36:43,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:36:43,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-18 19:36:43,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368502999] [2022-03-18 19:36:43,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:36:43,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:36:43,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:36:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:36:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:36:43,977 INFO L87 Difference]: Start difference. First operand 209 states and 249 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-18 19:36:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:36:44,036 INFO L93 Difference]: Finished difference Result 207 states and 247 transitions. [2022-03-18 19:36:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 19:36:44,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2022-03-18 19:36:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:36:44,037 INFO L225 Difference]: With dead ends: 207 [2022-03-18 19:36:44,037 INFO L226 Difference]: Without dead ends: 207 [2022-03-18 19:36:44,037 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:36:44,038 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 182 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 19:36:44,038 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 182 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:36:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-18 19:36:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2022-03-18 19:36:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 134 states have (on average 1.171641791044776) internal successors, (157), 139 states have internal predecessors, (157), 44 states have call successors, (44), 27 states have call predecessors, (44), 25 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-18 19:36:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 242 transitions. [2022-03-18 19:36:44,043 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 242 transitions. Word has length 82 [2022-03-18 19:36:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:36:44,043 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 242 transitions. [2022-03-18 19:36:44,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-18 19:36:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 242 transitions. [2022-03-18 19:36:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-18 19:36:44,044 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:36:44,044 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-03-18 19:36:44,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 19:36:44,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 19:36:44,256 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:36:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:36:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1053492757, now seen corresponding path program 1 times [2022-03-18 19:36:44,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:36:44,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691587579] [2022-03-18 19:36:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:44,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:36:44,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:36:44,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514829490] [2022-03-18 19:36:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:44,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:36:44,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:36:44,282 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:36:44,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 19:36:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:36:44,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 19:36:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:36:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 19:36:44,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:36:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 19:36:44,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:36:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691587579] [2022-03-18 19:36:44,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:36:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514829490] [2022-03-18 19:36:44,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514829490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:36:44,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:36:44,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-18 19:36:44,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151048414] [2022-03-18 19:36:44,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:36:44,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 19:36:44,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:36:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 19:36:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 19:36:44,913 INFO L87 Difference]: Start difference. First operand 204 states and 242 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-18 19:36:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:36:45,112 INFO L93 Difference]: Finished difference Result 208 states and 246 transitions. [2022-03-18 19:36:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 19:36:45,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 84 [2022-03-18 19:36:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:36:45,115 INFO L225 Difference]: With dead ends: 208 [2022-03-18 19:36:45,115 INFO L226 Difference]: Without dead ends: 185 [2022-03-18 19:36:45,117 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:36:45,118 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 19:36:45,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 382 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 19:36:45,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-18 19:36:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-03-18 19:36:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 126 states have internal predecessors, (143), 40 states have call successors, (40), 25 states have call predecessors, (40), 23 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-18 19:36:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 220 transitions. [2022-03-18 19:36:45,129 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 220 transitions. Word has length 84 [2022-03-18 19:36:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:36:45,130 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 220 transitions. [2022-03-18 19:36:45,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-18 19:36:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 220 transitions. [2022-03-18 19:36:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-18 19:36:45,133 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:36:45,133 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-03-18 19:36:45,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-18 19:36:45,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 19:36:45,355 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:36:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:36:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash -883405496, now seen corresponding path program 1 times [2022-03-18 19:36:45,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:36:45,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990123861] [2022-03-18 19:36:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:36:45,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:36:45,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488387867] [2022-03-18 19:36:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:45,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:36:45,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:36:45,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:36:45,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 19:36:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:36:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 19:36:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:36:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-18 19:36:45,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:36:45,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:36:45,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990123861] [2022-03-18 19:36:45,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:36:45,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488387867] [2022-03-18 19:36:45,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488387867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:36:45,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:36:45,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:36:45,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572390302] [2022-03-18 19:36:45,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:36:45,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:36:45,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:36:45,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:36:45,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:36:45,572 INFO L87 Difference]: Start difference. First operand 185 states and 220 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 19:36:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:36:45,615 INFO L93 Difference]: Finished difference Result 184 states and 218 transitions. [2022-03-18 19:36:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:36:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 88 [2022-03-18 19:36:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:36:45,617 INFO L225 Difference]: With dead ends: 184 [2022-03-18 19:36:45,617 INFO L226 Difference]: Without dead ends: 184 [2022-03-18 19:36:45,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:36:45,617 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:36:45,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 101 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:36:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-18 19:36:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 174. [2022-03-18 19:36:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 118 states have internal predecessors, (132), 36 states have call successors, (36), 23 states have call predecessors, (36), 22 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 19:36:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 202 transitions. [2022-03-18 19:36:45,624 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 202 transitions. Word has length 88 [2022-03-18 19:36:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:36:45,624 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 202 transitions. [2022-03-18 19:36:45,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 19:36:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 202 transitions. [2022-03-18 19:36:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 19:36:45,625 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:36:45,625 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:36:45,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 19:36:45,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 19:36:45,843 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:36:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:36:45,843 INFO L85 PathProgramCache]: Analyzing trace with hash 31379631, now seen corresponding path program 1 times [2022-03-18 19:36:45,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:36:45,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358031670] [2022-03-18 19:36:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:45,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:36:45,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:36:45,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323524027] [2022-03-18 19:36:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:45,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:36:45,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:36:45,867 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:36:45,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 19:36:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:36:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 19:36:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:36:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-18 19:36:46,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:36:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 19:36:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:36:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358031670] [2022-03-18 19:36:46,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:36:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323524027] [2022-03-18 19:36:46,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323524027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:36:46,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:36:46,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-18 19:36:46,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333719118] [2022-03-18 19:36:46,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:36:46,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 19:36:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:36:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 19:36:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 19:36:46,269 INFO L87 Difference]: Start difference. First operand 174 states and 202 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2022-03-18 19:36:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:36:46,375 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2022-03-18 19:36:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 19:36:46,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) Word has length 97 [2022-03-18 19:36:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:36:46,376 INFO L225 Difference]: With dead ends: 176 [2022-03-18 19:36:46,376 INFO L226 Difference]: Without dead ends: 176 [2022-03-18 19:36:46,376 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:36:46,376 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 16 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:36:46,376 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 195 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:36:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-18 19:36:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-03-18 19:36:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 120 states have internal predecessors, (134), 36 states have call successors, (36), 23 states have call predecessors, (36), 22 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 19:36:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 204 transitions. [2022-03-18 19:36:46,380 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 204 transitions. Word has length 97 [2022-03-18 19:36:46,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:36:46,380 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 204 transitions. [2022-03-18 19:36:46,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (29), 6 states have call predecessors, (29), 7 states have call successors, (29) [2022-03-18 19:36:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 204 transitions. [2022-03-18 19:36:46,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 19:36:46,381 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:36:46,381 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:36:46,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 19:36:46,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:36:46,586 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:36:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:36:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash -874901792, now seen corresponding path program 1 times [2022-03-18 19:36:46,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:36:46,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578086071] [2022-03-18 19:36:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:46,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:36:46,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:36:46,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138645484] [2022-03-18 19:36:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:36:46,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:36:46,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:36:46,600 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:36:46,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 19:36:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:36:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 19:36:46,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:36:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-18 19:36:47,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:37:19,614 WARN L232 SmtUtils]: Spent 5.34s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:37:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-18 19:37:49,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:37:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578086071] [2022-03-18 19:37:49,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:37:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138645484] [2022-03-18 19:37:49,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138645484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:37:49,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:37:49,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-18 19:37:49,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906409870] [2022-03-18 19:37:49,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:37:49,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 19:37:49,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:37:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 19:37:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-18 19:37:49,359 INFO L87 Difference]: Start difference. First operand 176 states and 204 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 13 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 13 states have call predecessors, (28), 11 states have call successors, (28) [2022-03-18 19:38:00,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:38:07,405 WARN L534 Checker$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 19:38:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:38:07,947 INFO L93 Difference]: Finished difference Result 209 states and 255 transitions. [2022-03-18 19:38:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 19:38:07,947 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 13 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 13 states have call predecessors, (28), 11 states have call successors, (28) Word has length 100 [2022-03-18 19:38:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:38:07,948 INFO L225 Difference]: With dead ends: 209 [2022-03-18 19:38:07,948 INFO L226 Difference]: Without dead ends: 209 [2022-03-18 19:38:07,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-03-18 19:38:07,949 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 87 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 130 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:38:07,949 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 552 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 579 Invalid, 2 Unknown, 0 Unchecked, 13.1s Time] [2022-03-18 19:38:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-18 19:38:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 188. [2022-03-18 19:38:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 128 states have internal predecessors, (144), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-18 19:38:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 224 transitions. [2022-03-18 19:38:07,953 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 224 transitions. Word has length 100 [2022-03-18 19:38:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:38:07,954 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 224 transitions. [2022-03-18 19:38:07,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 13 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 13 states have call predecessors, (28), 11 states have call successors, (28) [2022-03-18 19:38:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 224 transitions. [2022-03-18 19:38:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 19:38:07,954 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:38:07,955 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:38:07,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 19:38:08,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 19:38:08,155 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:38:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:38:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2022-03-18 19:38:08,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:38:08,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586686734] [2022-03-18 19:38:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:38:08,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:38:08,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:38:08,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670687528] [2022-03-18 19:38:08,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 19:38:08,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:38:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:38:08,163 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:38:08,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 19:38:08,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 19:38:08,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:38:08,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 19:38:08,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:38:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 19:38:09,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:39:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 19:39:01,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:39:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586686734] [2022-03-18 19:39:01,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:39:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670687528] [2022-03-18 19:39:01,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670687528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:39:01,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:39:01,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-03-18 19:39:01,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222339185] [2022-03-18 19:39:01,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:39:01,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 19:39:01,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:39:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 19:39:01,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=277, Unknown=1, NotChecked=0, Total=342 [2022-03-18 19:39:01,864 INFO L87 Difference]: Start difference. First operand 188 states and 224 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2022-03-18 19:40:26,010 WARN L232 SmtUtils]: Spent 1.38m on a formula simplification. DAG size of input: 196 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:40:28,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:40:30,883 WARN L534 Checker$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 19:40:32,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:40:35,430 WARN L534 Checker$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 19:40:37,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:40:39,445 WARN L534 Checker$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 19:40:42,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:40:52,183 WARN L534 Checker$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 19:40:54,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:40:56,193 WARN L534 Checker$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 19:40:58,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:41:09,848 WARN L232 SmtUtils]: Spent 11.32s on a formula simplification. DAG size of input: 85 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 19:41:16,917 WARN L534 Checker$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 19:41:22,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:41:26,878 WARN L534 Checker$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 19:41:29,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:41:31,633 WARN L534 Checker$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 19:41:33,707 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 19:41:34,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:41:34,550 INFO L93 Difference]: Finished difference Result 262 states and 330 transitions. [2022-03-18 19:41:34,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 19:41:34,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 100 [2022-03-18 19:41:34,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:41:34,551 INFO L225 Difference]: With dead ends: 262 [2022-03-18 19:41:34,551 INFO L226 Difference]: Without dead ends: 251 [2022-03-18 19:41:34,551 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 116.3s TimeCoverageRelationStatistics Valid=178, Invalid=749, Unknown=3, NotChecked=0, Total=930 [2022-03-18 19:41:34,552 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 152 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 182 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.3s IncrementalHoareTripleChecker+Time [2022-03-18 19:41:34,552 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 943 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 728 Invalid, 17 Unknown, 0 Unchecked, 46.3s Time] [2022-03-18 19:41:34,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-18 19:41:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 215. [2022-03-18 19:41:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 143 states have (on average 1.167832167832168) internal successors, (167), 148 states have internal predecessors, (167), 45 states have call successors, (45), 27 states have call predecessors, (45), 26 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 19:41:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2022-03-18 19:41:34,556 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 255 transitions. Word has length 100 [2022-03-18 19:41:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:41:34,567 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 255 transitions. [2022-03-18 19:41:34,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 17 states have internal predecessors, (55), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2022-03-18 19:41:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 255 transitions. [2022-03-18 19:41:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 19:41:34,568 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:41:34,568 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-18 19:41:34,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 19:41:34,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:41:34,769 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:41:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:41:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1453917651, now seen corresponding path program 2 times [2022-03-18 19:41:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:41:34,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230006466] [2022-03-18 19:41:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:41:34,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:41:34,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:41:34,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289977260] [2022-03-18 19:41:34,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:41:34,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:41:34,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:41:34,779 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:41:34,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 19:41:34,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:41:34,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-18 19:41:34,847 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 19:41:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 19:41:34,931 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 19:41:34,932 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 19:41:34,932 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 19:41:34,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 19:41:35,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:41:35,150 INFO L718 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:41:35,151 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 19:41:35,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:41:35 BasicIcfg [2022-03-18 19:41:35,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 19:41:35,199 INFO L158 Benchmark]: Toolchain (without parser) took 571358.34ms. Allocated memory was 229.6MB in the beginning and 373.3MB in the end (delta: 143.7MB). Free memory was 178.0MB in the beginning and 167.8MB in the end (delta: 10.3MB). Peak memory consumption was 155.1MB. Max. memory is 8.0GB. [2022-03-18 19:41:35,199 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 229.6MB. Free memory is still 194.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 19:41:35,199 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.32ms. Allocated memory was 229.6MB in the beginning and 310.4MB in the end (delta: 80.7MB). Free memory was 177.9MB in the beginning and 284.2MB in the end (delta: -106.3MB). Peak memory consumption was 9.0MB. Max. memory is 8.0GB. [2022-03-18 19:41:35,199 INFO L158 Benchmark]: Boogie Preprocessor took 48.57ms. Allocated memory is still 310.4MB. Free memory was 284.2MB in the beginning and 282.9MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 19:41:35,199 INFO L158 Benchmark]: RCFGBuilder took 262.30ms. Allocated memory is still 310.4MB. Free memory was 282.9MB in the beginning and 272.0MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 19:41:35,199 INFO L158 Benchmark]: IcfgTransformer took 46.00ms. Allocated memory is still 310.4MB. Free memory was 272.0MB in the beginning and 270.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 19:41:35,200 INFO L158 Benchmark]: TraceAbstraction took 570770.19ms. Allocated memory was 310.4MB in the beginning and 373.3MB in the end (delta: 62.9MB). Free memory was 270.3MB in the beginning and 167.8MB in the end (delta: 102.5MB). Peak memory consumption was 167.0MB. Max. memory is 8.0GB. [2022-03-18 19:41:35,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 229.6MB. Free memory is still 194.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.32ms. Allocated memory was 229.6MB in the beginning and 310.4MB in the end (delta: 80.7MB). Free memory was 177.9MB in the beginning and 284.2MB in the end (delta: -106.3MB). Peak memory consumption was 9.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 48.57ms. Allocated memory is still 310.4MB. Free memory was 284.2MB in the beginning and 282.9MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 262.30ms. Allocated memory is still 310.4MB. Free memory was 282.9MB in the beginning and 272.0MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 46.00ms. Allocated memory is still 310.4MB. Free memory was 272.0MB in the beginning and 270.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 570770.19ms. Allocated memory was 310.4MB in the beginning and 373.3MB in the end (delta: 62.9MB). Free memory was 270.3MB in the beginning and 167.8MB in the end (delta: 102.5MB). Peak memory consumption was 167.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=11, counter=0] [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [\old(counter)=0, A=4, B=1, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [\old(counter)=0, A=4, B=1, counter=0, d=1, p=1, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=4, B=1, counter=1, d=2, p=2, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=4, B=1, counter=2, d=4, p=4, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=4, B=1, counter=3, d=8, p=8, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L39] COND TRUE !(r >= d) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L45] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=5, counter++=4, d=8, p=8, q=0, r=4] [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L46] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L47] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [\old(counter)=0, A=4, B=1, counter=5, d=4, p=4, q=0, r=4] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [\old(counter)=0, A=4, B=1, counter=5, d=4, p=4, q=4, r=0] [L45] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=6, counter++=5, d=4, p=4, q=4, r=0] [L45] COND FALSE !(counter++<5) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 570.7s, OverallIterations: 20, TraceHistogramMax: 15, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 240.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 24 mSolverCounterUnknown, 774 SdHoareTripleChecker+Valid, 76.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 705 mSDsluCounter, 4679 SdHoareTripleChecker+Invalid, 76.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3725 mSDsCounter, 706 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2989 IncrementalHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 706 mSolverCounterUnsat, 954 mSDtfsCounter, 2989 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1858 GetRequests, 1636 SyntacticMatches, 15 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 238.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=215occurred in iteration=19, InterpolantAutomatonStates: 181, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 161 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 324.2s InterpolantComputationTime, 1173 NumberOfCodeBlocks, 1145 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1763 ConstructedInterpolants, 0 QuantifiedInterpolants, 35017 SizeOfPredicates, 45 NumberOfNonLiveVariables, 2725 ConjunctsInSsa, 245 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 3825/4473 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-18 19:41:35,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...