/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/hard2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:45:48,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:45:48,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:45:48,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:45:48,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:45:48,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:45:48,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:45:48,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:45:48,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:45:48,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:45:48,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:45:48,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:45:48,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:45:48,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:45:48,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:45:48,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:45:48,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:45:48,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:45:48,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:45:49,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:45:49,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:45:49,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:45:49,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:45:49,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:45:49,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:45:49,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:45:49,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:45:49,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:45:49,012 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:45:49,019 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:45:49,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:45:49,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:45:49,020 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:45:49,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:45:49,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:45:49,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:45:49,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:45:49,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:45:49,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:45:49,021 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:45:49,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:45:49,021 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:45:49,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:45:49,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:45:49,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:45:49,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:45:49,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:45:49,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:45:49,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:45:49,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:45:49,023 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:45:49,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:45:49,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:45:49,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:45:49,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:45:49,222 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:45:49,226 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:45:49,227 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-02-23 18:45:49,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20dae79a0/2989fa39e58e4ebbb003701a6a4add8a/FLAG43124074f [2022-02-23 18:45:49,637 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:45:49,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-02-23 18:45:49,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20dae79a0/2989fa39e58e4ebbb003701a6a4add8a/FLAG43124074f [2022-02-23 18:45:50,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20dae79a0/2989fa39e58e4ebbb003701a6a4add8a [2022-02-23 18:45:50,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:45:50,057 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:45:50,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:45:50,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:45:50,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:45:50,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3abce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50, skipping insertion in model container [2022-02-23 18:45:50,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:45:50,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:45:50,248 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/hard2_unwindbound20.c[526,539] [2022-02-23 18:45:50,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:45:50,265 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:45:50,272 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/hard2_unwindbound20.c[526,539] [2022-02-23 18:45:50,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:45:50,284 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:45:50,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50 WrapperNode [2022-02-23 18:45:50,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:45:50,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:45:50,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:45:50,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:45:50,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:45:50,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:45:50,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:45:50,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:45:50,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:45:50,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:45:50,369 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) [2022-02-23 18:45:50,375 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 [2022-02-23 18:45:50,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:45:50,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:45:50,396 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:45:50,396 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:45:50,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:45:50,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:45:50,397 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:45:50,397 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:45:50,397 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:45:50,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:45:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 18:45:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:45:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:45:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:45:50,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:45:50,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:45:50,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:45:50,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:45:50,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:45:50,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:45:50,449 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:45:50,450 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:45:50,604 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:45:50,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:45:50,608 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 18:45:50,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:45:50 BoogieIcfgContainer [2022-02-23 18:45:50,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:45:50,610 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:45:50,610 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:45:50,612 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:45:50,629 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:45:50" (1/1) ... [2022-02-23 18:45:50,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:45:50 BasicIcfg [2022-02-23 18:45:50,655 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:45:50,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:45:50,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:45:50,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:45:50,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:45:50" (1/4) ... [2022-02-23 18:45:50,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5729da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:45:50, skipping insertion in model container [2022-02-23 18:45:50,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:45:50" (2/4) ... [2022-02-23 18:45:50,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5729da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:45:50, skipping insertion in model container [2022-02-23 18:45:50,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:45:50" (3/4) ... [2022-02-23 18:45:50,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5729da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:45:50, skipping insertion in model container [2022-02-23 18:45:50,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:45:50" (4/4) ... [2022-02-23 18:45:50,661 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.cJordan [2022-02-23 18:45:50,664 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:45:50,664 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:45:50,706 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:45:50,714 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 18:45:50,715 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:45:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 18:45:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 18:45:50,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:50,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:45:50,738 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-02-23 18:45:50,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:50,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995905466] [2022-02-23 18:45:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:50,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:50,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:45:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 18:45:50,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:50,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995905466] [2022-02-23 18:45:50,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995905466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:45:50,904 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:45:50,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:45:50,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661132723] [2022-02-23 18:45:50,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:45:50,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:45:50,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:50,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:45:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:45:50,934 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 18:45:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:51,012 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-02-23 18:45:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:45:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 18:45:51,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:51,022 INFO L225 Difference]: With dead ends: 32 [2022-02-23 18:45:51,022 INFO L226 Difference]: Without dead ends: 27 [2022-02-23 18:45:51,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:45:51,026 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:51,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:45:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-23 18:45:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-02-23 18:45:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 18:45:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-02-23 18:45:51,060 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-02-23 18:45:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:51,061 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-02-23 18:45:51,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 18:45:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-02-23 18:45:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 18:45:51,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:51,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:45:51,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:45:51,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-02-23 18:45:51,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:51,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906645596] [2022-02-23 18:45:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:51,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:45:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 18:45:51,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:51,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906645596] [2022-02-23 18:45:51,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906645596] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:45:51,189 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:45:51,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:45:51,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565686566] [2022-02-23 18:45:51,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:45:51,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:45:51,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:45:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:45:51,191 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 18:45:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:51,334 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-02-23 18:45:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 18:45:51,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-23 18:45:51,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:51,337 INFO L225 Difference]: With dead ends: 39 [2022-02-23 18:45:51,337 INFO L226 Difference]: Without dead ends: 39 [2022-02-23 18:45:51,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:45:51,341 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:51,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:45:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-23 18:45:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-02-23 18:45:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 18:45:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-02-23 18:45:51,352 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-02-23 18:45:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:51,352 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-02-23 18:45:51,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 18:45:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-02-23 18:45:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 18:45:51,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:51,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:45:51,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 18:45:51,359 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-02-23 18:45:51,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:51,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423796062] [2022-02-23 18:45:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:51,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:45:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 18:45:51,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:51,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423796062] [2022-02-23 18:45:51,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423796062] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:45:51,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:45:51,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 18:45:51,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122095525] [2022-02-23 18:45:51,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:45:51,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:45:51,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:51,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:45:51,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:45:51,436 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 18:45:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:51,499 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-02-23 18:45:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:45:51,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 18:45:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:51,501 INFO L225 Difference]: With dead ends: 32 [2022-02-23 18:45:51,501 INFO L226 Difference]: Without dead ends: 32 [2022-02-23 18:45:51,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:45:51,507 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:51,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:45:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-23 18:45:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-23 18:45:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 18:45:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-02-23 18:45:51,515 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-02-23 18:45:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:51,515 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-02-23 18:45:51,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 18:45:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-02-23 18:45:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 18:45:51,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:51,516 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:45:51,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 18:45:51,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:51,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:51,516 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-02-23 18:45:51,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:51,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35950234] [2022-02-23 18:45:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:51,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:51,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:45:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:51,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-23 18:45:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 18:45:51,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:51,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35950234] [2022-02-23 18:45:51,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35950234] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:45:51,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:45:51,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:45:51,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548274173] [2022-02-23 18:45:51,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:45:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:45:51,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:45:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:45:51,586 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 18:45:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:51,676 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-02-23 18:45:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 18:45:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-02-23 18:45:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:51,677 INFO L225 Difference]: With dead ends: 44 [2022-02-23 18:45:51,677 INFO L226 Difference]: Without dead ends: 44 [2022-02-23 18:45:51,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:45:51,678 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:51,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:45:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-23 18:45:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-02-23 18:45:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 18:45:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-02-23 18:45:51,682 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-02-23 18:45:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:51,682 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-02-23 18:45:51,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 18:45:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-02-23 18:45:51,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 18:45:51,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:51,683 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:45:51,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 18:45:51,683 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-02-23 18:45:51,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:51,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581865803] [2022-02-23 18:45:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:51,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:51,699 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:45:51,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308508947] [2022-02-23 18:45:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:51,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:51,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:45:51,701 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) [2022-02-23 18:45:51,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 18:45:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:51,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:45:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:45:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:45:51,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:45:51,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:51,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581865803] [2022-02-23 18:45:51,833 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:45:51,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308508947] [2022-02-23 18:45:51,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308508947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:45:51,833 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:45:51,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:45:51,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167152585] [2022-02-23 18:45:51,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:45:51,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:45:51,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:45:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:45:51,835 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:45:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:51,865 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-02-23 18:45:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:45:51,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 18:45:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:51,866 INFO L225 Difference]: With dead ends: 51 [2022-02-23 18:45:51,866 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 18:45:51,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:45:51,867 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:51,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:45:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 18:45:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-23 18:45:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:45:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-02-23 18:45:51,871 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-02-23 18:45:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:51,871 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-02-23 18:45:51,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 18:45:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-02-23 18:45:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 18:45:51,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:51,872 INFO L514 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] [2022-02-23 18:45:51,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 18:45:52,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:52,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:52,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-02-23 18:45:52,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:52,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036357435] [2022-02-23 18:45:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:52,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:52,096 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:45:52,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101702006] [2022-02-23 18:45:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:52,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:52,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:45:52,098 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) [2022-02-23 18:45:52,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 18:45:52,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:52,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:45:52,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:45:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:45:52,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:45:52,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:52,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036357435] [2022-02-23 18:45:52,210 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:45:52,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101702006] [2022-02-23 18:45:52,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101702006] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:45:52,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:45:52,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:45:52,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410518921] [2022-02-23 18:45:52,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:45:52,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:45:52,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:52,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:45:52,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:45:52,212 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 18:45:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:52,229 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-02-23 18:45:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:45:52,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-23 18:45:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:52,230 INFO L225 Difference]: With dead ends: 63 [2022-02-23 18:45:52,230 INFO L226 Difference]: Without dead ends: 63 [2022-02-23 18:45:52,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:45:52,231 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:52,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:45:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-23 18:45:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-02-23 18:45:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:45:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-02-23 18:45:52,235 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-02-23 18:45:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:52,235 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-02-23 18:45:52,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 18:45:52,235 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-02-23 18:45:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 18:45:52,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:52,236 INFO L514 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] [2022-02-23 18:45:52,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 18:45:52,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-02-23 18:45:52,451 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-02-23 18:45:52,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:52,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906535622] [2022-02-23 18:45:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:52,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:52,458 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:45:52,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412323523] [2022-02-23 18:45:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:52,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:52,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:45:52,460 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) [2022-02-23 18:45:52,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 18:45:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:52,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:45:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:45:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:45:52,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:45:52,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:52,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906535622] [2022-02-23 18:45:52,630 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:45:52,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412323523] [2022-02-23 18:45:52,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412323523] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:45:52,630 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:45:52,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:45:52,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502366275] [2022-02-23 18:45:52,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:45:52,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:45:52,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:45:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:45:52,631 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-02-23 18:45:52,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:52,683 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-02-23 18:45:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:45:52,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 30 [2022-02-23 18:45:52,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:52,684 INFO L225 Difference]: With dead ends: 74 [2022-02-23 18:45:52,684 INFO L226 Difference]: Without dead ends: 64 [2022-02-23 18:45:52,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:45:52,685 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:52,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:45:52,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-23 18:45:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-02-23 18:45:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 18:45:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-02-23 18:45:52,689 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-02-23 18:45:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:52,689 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-02-23 18:45:52,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-02-23 18:45:52,689 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-02-23 18:45:52,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 18:45:52,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:52,690 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:45:52,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 18:45:52,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:52,900 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:52,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-02-23 18:45:52,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:52,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316004792] [2022-02-23 18:45:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:52,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:52,907 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:45:52,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756927834] [2022-02-23 18:45:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:52,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:52,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:45:52,911 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) [2022-02-23 18:45:52,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 18:45:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:52,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:45:52,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:45:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-02-23 18:45:53,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:45:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:45:53,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:53,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316004792] [2022-02-23 18:45:53,102 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:45:53,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756927834] [2022-02-23 18:45:53,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756927834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:45:53,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:45:53,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 18:45:53,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949520574] [2022-02-23 18:45:53,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:45:53,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 18:45:53,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:53,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 18:45:53,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:45:53,104 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-02-23 18:45:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:53,164 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2022-02-23 18:45:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:45:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-02-23 18:45:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:53,166 INFO L225 Difference]: With dead ends: 119 [2022-02-23 18:45:53,167 INFO L226 Difference]: Without dead ends: 119 [2022-02-23 18:45:53,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:45:53,167 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:53,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:45:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-23 18:45:53,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-02-23 18:45:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-23 18:45:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-02-23 18:45:53,174 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-02-23 18:45:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:53,175 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-02-23 18:45:53,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-02-23 18:45:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-02-23 18:45:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 18:45:53,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:53,176 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:45:53,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-23 18:45:53,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:53,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-02-23 18:45:53,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:53,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852535931] [2022-02-23 18:45:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:53,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:53,399 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:45:53,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999543113] [2022-02-23 18:45:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:53,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:53,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:45:53,400 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) [2022-02-23 18:45:53,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 18:45:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:53,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 18:45:53,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:45:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 18:45:53,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:45:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 18:45:53,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:53,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852535931] [2022-02-23 18:45:53,659 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:45:53,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999543113] [2022-02-23 18:45:53,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999543113] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:45:53,660 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:45:53,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-23 18:45:53,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646337251] [2022-02-23 18:45:53,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:45:53,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:45:53,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:53,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:45:53,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 18:45:53,661 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-02-23 18:45:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:53,689 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-02-23 18:45:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:45:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 40 [2022-02-23 18:45:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:53,691 INFO L225 Difference]: With dead ends: 127 [2022-02-23 18:45:53,691 INFO L226 Difference]: Without dead ends: 125 [2022-02-23 18:45:53,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:45:53,691 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:53,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:45:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-23 18:45:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-02-23 18:45:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-23 18:45:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-02-23 18:45:53,697 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-02-23 18:45:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:53,697 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-02-23 18:45:53,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-02-23 18:45:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-02-23 18:45:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-23 18:45:53,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:53,699 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:45:53,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 18:45:53,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:53,912 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-02-23 18:45:53,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:53,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472164357] [2022-02-23 18:45:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:53,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:53,919 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:45:53,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80433537] [2022-02-23 18:45:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:45:53,921 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) [2022-02-23 18:45:53,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 18:45:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:45:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:45:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 18:45:54,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:45:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 18:45:54,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:54,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472164357] [2022-02-23 18:45:54,146 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:45:54,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80433537] [2022-02-23 18:45:54,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80433537] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:45:54,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:45:54,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 18:45:54,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391205808] [2022-02-23 18:45:54,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:45:54,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:45:54,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:45:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:45:54,147 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-23 18:45:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:54,246 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-02-23 18:45:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 18:45:54,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-02-23 18:45:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:54,247 INFO L225 Difference]: With dead ends: 224 [2022-02-23 18:45:54,247 INFO L226 Difference]: Without dead ends: 224 [2022-02-23 18:45:54,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:45:54,248 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 82 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:54,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 233 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:45:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-23 18:45:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-02-23 18:45:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 51 states have call successors, (51), 28 states have call predecessors, (51), 26 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-23 18:45:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-02-23 18:45:54,257 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 53 [2022-02-23 18:45:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:54,258 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-02-23 18:45:54,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-23 18:45:54,258 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-02-23 18:45:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-23 18:45:54,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:45:54,259 INFO L514 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] [2022-02-23 18:45:54,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 18:45:54,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:54,471 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:45:54,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:45:54,471 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-02-23 18:45:54,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:45:54,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866848732] [2022-02-23 18:45:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:54,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:45:54,478 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:45:54,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195013311] [2022-02-23 18:45:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:45:54,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:45:54,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:45:54,481 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) [2022-02-23 18:45:54,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 18:45:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:45:54,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 18:45:54,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:45:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 18:45:54,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:45:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-23 18:45:55,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:45:55,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866848732] [2022-02-23 18:45:55,603 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:45:55,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195013311] [2022-02-23 18:45:55,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195013311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:45:55,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:45:55,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-23 18:45:55,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557490889] [2022-02-23 18:45:55,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:45:55,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:45:55,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:45:55,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:45:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:45:55,604 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 18:45:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:45:59,985 INFO L93 Difference]: Finished difference Result 310 states and 393 transitions. [2022-02-23 18:45:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:45:59,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-02-23 18:45:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:45:59,987 INFO L225 Difference]: With dead ends: 310 [2022-02-23 18:45:59,988 INFO L226 Difference]: Without dead ends: 303 [2022-02-23 18:45:59,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:45:59,988 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 52 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:45:59,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 294 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 18:45:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-23 18:45:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-02-23 18:45:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 191 states have internal predecessors, (228), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-23 18:45:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 341 transitions. [2022-02-23 18:45:59,999 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 341 transitions. Word has length 62 [2022-02-23 18:45:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:45:59,999 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 341 transitions. [2022-02-23 18:45:59,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-23 18:45:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 341 transitions. [2022-02-23 18:46:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-23 18:46:00,000 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:46:00,000 INFO L514 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] [2022-02-23 18:46:00,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 18:46:00,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:00,215 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:46:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:46:00,215 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-02-23 18:46:00,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:46:00,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726724292] [2022-02-23 18:46:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:00,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:46:00,221 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:46:00,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280129265] [2022-02-23 18:46:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:00,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:00,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:46:00,227 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) [2022-02-23 18:46:00,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 18:46:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:46:00,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-23 18:46:00,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:46:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-02-23 18:46:00,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:46:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-02-23 18:46:00,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:46:00,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726724292] [2022-02-23 18:46:00,875 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:46:00,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280129265] [2022-02-23 18:46:00,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280129265] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:46:00,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:46:00,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-02-23 18:46:00,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619250889] [2022-02-23 18:46:00,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:46:00,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 18:46:00,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:46:00,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 18:46:00,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-23 18:46:00,877 INFO L87 Difference]: Start difference. First operand 274 states and 341 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-02-23 18:46:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:46:01,228 INFO L93 Difference]: Finished difference Result 266 states and 313 transitions. [2022-02-23 18:46:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 18:46:01,228 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-02-23 18:46:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:46:01,230 INFO L225 Difference]: With dead ends: 266 [2022-02-23 18:46:01,230 INFO L226 Difference]: Without dead ends: 239 [2022-02-23 18:46:01,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-23 18:46:01,231 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:46:01,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 243 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:46:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-23 18:46:01,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-02-23 18:46:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 154 states have internal predecessors, (179), 45 states have call successors, (45), 29 states have call predecessors, (45), 27 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 18:46:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2022-02-23 18:46:01,238 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 73 [2022-02-23 18:46:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:46:01,239 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2022-02-23 18:46:01,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-02-23 18:46:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2022-02-23 18:46:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-23 18:46:01,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:46:01,241 INFO L514 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] [2022-02-23 18:46:01,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 18:46:01,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 18:46:01,452 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:46:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:46:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-02-23 18:46:01,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:46:01,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762924540] [2022-02-23 18:46:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:01,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:46:01,458 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:46:01,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288737921] [2022-02-23 18:46:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:01,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:01,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:46:01,467 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) [2022-02-23 18:46:01,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 18:46:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:46:01,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 18:46:01,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:46:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-02-23 18:46:01,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:46:01,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:46:01,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762924540] [2022-02-23 18:46:01,739 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:46:01,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288737921] [2022-02-23 18:46:01,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288737921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:46:01,739 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:46:01,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:46:01,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186983384] [2022-02-23 18:46:01,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:46:01,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:46:01,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:46:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:46:01,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:46:01,742 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-23 18:46:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:46:01,781 INFO L93 Difference]: Finished difference Result 222 states and 263 transitions. [2022-02-23 18:46:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:46:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-02-23 18:46:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:46:01,782 INFO L225 Difference]: With dead ends: 222 [2022-02-23 18:46:01,782 INFO L226 Difference]: Without dead ends: 222 [2022-02-23 18:46:01,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:46:01,783 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:46:01,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 96 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:46:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-02-23 18:46:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2022-02-23 18:46:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-23 18:46:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-02-23 18:46:01,789 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 82 [2022-02-23 18:46:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:46:01,789 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-02-23 18:46:01,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-23 18:46:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-02-23 18:46:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 18:46:01,790 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:46:01,790 INFO L514 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] [2022-02-23 18:46:01,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-23 18:46:01,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 18:46:01,999 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:46:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:46:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-02-23 18:46:02,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:46:02,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211360645] [2022-02-23 18:46:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:02,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:46:02,011 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:46:02,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419997240] [2022-02-23 18:46:02,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:46:02,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:46:02,021 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) [2022-02-23 18:46:02,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 18:46:02,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:46:02,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:46:02,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-23 18:46:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:46:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-23 18:46:02,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:46:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-23 18:46:19,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:46:19,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211360645] [2022-02-23 18:46:19,171 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:46:19,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419997240] [2022-02-23 18:46:19,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419997240] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:46:19,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:46:19,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-23 18:46:19,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568474656] [2022-02-23 18:46:19,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:46:19,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 18:46:19,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:46:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 18:46:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-23 18:46:19,172 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-02-23 18:46:28,474 WARN L232 SmtUtils]: Spent 9.06s on a formula simplification. DAG size of input: 192 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:46:31,170 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 [] [2022-02-23 18:46:40,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:46:42,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:46:48,110 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 [] [2022-02-23 18:46:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:46:48,840 INFO L93 Difference]: Finished difference Result 293 states and 379 transitions. [2022-02-23 18:46:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 18:46:48,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-02-23 18:46:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:46:48,842 INFO L225 Difference]: With dead ends: 293 [2022-02-23 18:46:48,842 INFO L226 Difference]: Without dead ends: 275 [2022-02-23 18:46:48,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-02-23 18:46:48,842 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 125 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 193 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:46:48,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 659 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 522 Invalid, 4 Unknown, 0 Unchecked, 13.1s Time] [2022-02-23 18:46:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-23 18:46:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-02-23 18:46:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 177 states have internal predecessors, (211), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-23 18:46:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-02-23 18:46:48,849 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 94 [2022-02-23 18:46:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:46:48,850 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-02-23 18:46:48,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-02-23 18:46:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-02-23 18:46:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-23 18:46:48,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:46:48,851 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:46:48,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 18:46:49,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 18:46:49,051 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:46:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:46:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash -105290329, now seen corresponding path program 1 times [2022-02-23 18:46:49,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:46:49,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635969666] [2022-02-23 18:46:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:46:49,058 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:46:49,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988094699] [2022-02-23 18:46:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:49,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:46:49,063 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) [2022-02-23 18:46:49,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 18:46:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:46:49,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 18:46:49,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:46:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-02-23 18:46:49,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:46:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-02-23 18:46:49,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:46:49,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635969666] [2022-02-23 18:46:49,465 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:46:49,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988094699] [2022-02-23 18:46:49,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988094699] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:46:49,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:46:49,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 18:46:49,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310896217] [2022-02-23 18:46:49,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:46:49,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 18:46:49,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:46:49,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 18:46:49,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:46:49,481 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-02-23 18:46:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:46:49,692 INFO L93 Difference]: Finished difference Result 661 states and 888 transitions. [2022-02-23 18:46:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 18:46:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 100 [2022-02-23 18:46:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:46:49,695 INFO L225 Difference]: With dead ends: 661 [2022-02-23 18:46:49,695 INFO L226 Difference]: Without dead ends: 659 [2022-02-23 18:46:49,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-23 18:46:49,696 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 148 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:46:49,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 400 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:46:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-23 18:46:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-02-23 18:46:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 361 states have (on average 1.2825484764542936) internal successors, (463), 378 states have internal predecessors, (463), 136 states have call successors, (136), 56 states have call predecessors, (136), 54 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-02-23 18:46:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 730 transitions. [2022-02-23 18:46:49,710 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 730 transitions. Word has length 100 [2022-02-23 18:46:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:46:49,710 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 730 transitions. [2022-02-23 18:46:49,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-02-23 18:46:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 730 transitions. [2022-02-23 18:46:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-23 18:46:49,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:46:49,711 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:46:49,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 18:46:49,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-23 18:46:49,912 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:46:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:46:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash 331614142, now seen corresponding path program 1 times [2022-02-23 18:46:49,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:46:49,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393197615] [2022-02-23 18:46:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:49,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:46:49,919 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:46:49,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648150619] [2022-02-23 18:46:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:49,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:49,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:46:49,921 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) [2022-02-23 18:46:49,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 18:46:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:46:49,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 18:46:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:46:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-02-23 18:46:50,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:46:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-23 18:46:50,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:46:50,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393197615] [2022-02-23 18:46:50,425 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:46:50,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648150619] [2022-02-23 18:46:50,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648150619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:46:50,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:46:50,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-02-23 18:46:50,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119556174] [2022-02-23 18:46:50,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:46:50,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 18:46:50,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:46:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 18:46:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-23 18:46:50,427 INFO L87 Difference]: Start difference. First operand 552 states and 730 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-02-23 18:46:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:46:50,785 INFO L93 Difference]: Finished difference Result 1124 states and 1476 transitions. [2022-02-23 18:46:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-23 18:46:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) Word has length 108 [2022-02-23 18:46:50,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:46:50,790 INFO L225 Difference]: With dead ends: 1124 [2022-02-23 18:46:50,790 INFO L226 Difference]: Without dead ends: 1122 [2022-02-23 18:46:50,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-02-23 18:46:50,791 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 328 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:46:50,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 500 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:46:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-02-23 18:46:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1097. [2022-02-23 18:46:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.2455418381344308) internal successors, (908), 758 states have internal predecessors, (908), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-02-23 18:46:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1457 transitions. [2022-02-23 18:46:50,813 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1457 transitions. Word has length 108 [2022-02-23 18:46:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:46:50,814 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1457 transitions. [2022-02-23 18:46:50,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-02-23 18:46:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1457 transitions. [2022-02-23 18:46:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-23 18:46:50,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:46:50,815 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:46:50,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 18:46:51,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 18:46:51,032 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:46:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:46:51,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1288142005, now seen corresponding path program 1 times [2022-02-23 18:46:51,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:46:51,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109396968] [2022-02-23 18:46:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:51,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:46:51,039 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:46:51,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867729292] [2022-02-23 18:46:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:51,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:51,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:46:51,048 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) [2022-02-23 18:46:51,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 18:46:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:46:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 18:46:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:46:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-23 18:46:51,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:46:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-23 18:46:52,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:46:52,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109396968] [2022-02-23 18:46:52,107 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:46:52,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867729292] [2022-02-23 18:46:52,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867729292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:46:52,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:46:52,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-23 18:46:52,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69297052] [2022-02-23 18:46:52,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:46:52,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:46:52,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:46:52,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:46:52,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:46:52,109 INFO L87 Difference]: Start difference. First operand 1097 states and 1457 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-02-23 18:46:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:46:52,367 INFO L93 Difference]: Finished difference Result 1101 states and 1461 transitions. [2022-02-23 18:46:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:46:52,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 110 [2022-02-23 18:46:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:46:52,371 INFO L225 Difference]: With dead ends: 1101 [2022-02-23 18:46:52,371 INFO L226 Difference]: Without dead ends: 1097 [2022-02-23 18:46:52,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:46:52,372 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:46:52,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 350 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:46:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-02-23 18:46:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2022-02-23 18:46:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.242798353909465) internal successors, (906), 758 states have internal predecessors, (906), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-02-23 18:46:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1455 transitions. [2022-02-23 18:46:52,392 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1455 transitions. Word has length 110 [2022-02-23 18:46:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:46:52,393 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1455 transitions. [2022-02-23 18:46:52,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-02-23 18:46:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1455 transitions. [2022-02-23 18:46:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-23 18:46:52,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:46:52,394 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:46:52,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 18:46:52,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 18:46:52,615 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:46:52,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:46:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash 848408867, now seen corresponding path program 2 times [2022-02-23 18:46:52,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:46:52,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760526106] [2022-02-23 18:46:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:52,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:46:52,628 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:46:52,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896578234] [2022-02-23 18:46:52,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:46:52,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:52,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:46:52,633 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) [2022-02-23 18:46:52,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 18:46:52,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:46:52,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:46:52,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 18:46:52,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:46:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-02-23 18:46:52,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:46:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-02-23 18:46:53,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:46:53,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760526106] [2022-02-23 18:46:53,189 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:46:53,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896578234] [2022-02-23 18:46:53,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896578234] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:46:53,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:46:53,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-02-23 18:46:53,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257540393] [2022-02-23 18:46:53,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:46:53,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:46:53,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:46:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:46:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:46:53,191 INFO L87 Difference]: Start difference. First operand 1097 states and 1455 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-02-23 18:46:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:46:53,265 INFO L93 Difference]: Finished difference Result 947 states and 1203 transitions. [2022-02-23 18:46:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:46:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 124 [2022-02-23 18:46:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:46:53,269 INFO L225 Difference]: With dead ends: 947 [2022-02-23 18:46:53,269 INFO L226 Difference]: Without dead ends: 907 [2022-02-23 18:46:53,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:46:53,269 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 3 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:46:53,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 262 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:46:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-02-23 18:46:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 905. [2022-02-23 18:46:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 598 states have (on average 1.2040133779264215) internal successors, (720), 627 states have internal predecessors, (720), 221 states have call successors, (221), 87 states have call predecessors, (221), 85 states have return successors, (212), 190 states have call predecessors, (212), 212 states have call successors, (212) [2022-02-23 18:46:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1153 transitions. [2022-02-23 18:46:53,286 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1153 transitions. Word has length 124 [2022-02-23 18:46:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:46:53,287 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1153 transitions. [2022-02-23 18:46:53,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-02-23 18:46:53,288 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1153 transitions. [2022-02-23 18:46:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-23 18:46:53,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:46:53,289 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:46:53,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 18:46:53,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:53,509 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:46:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:46:53,509 INFO L85 PathProgramCache]: Analyzing trace with hash 722879610, now seen corresponding path program 3 times [2022-02-23 18:46:53,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:46:53,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047427789] [2022-02-23 18:46:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:46:53,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:46:53,522 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:46:53,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623554932] [2022-02-23 18:46:53,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:46:53,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:46:53,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:46:53,547 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) [2022-02-23 18:46:53,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 18:46:53,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 18:46:53,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:46:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 18:46:53,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:46:53,901 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:46:53,972 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:46:54,050 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:46:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-02-23 18:46:54,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:47:04,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:47:04,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047427789] [2022-02-23 18:47:04,965 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:47:04,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623554932] [2022-02-23 18:47:04,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623554932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:47:04,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:47:04,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 18:47:04,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021410892] [2022-02-23 18:47:04,966 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:47:04,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:47:04,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:47:04,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:47:04,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:47:04,967 INFO L87 Difference]: Start difference. First operand 905 states and 1153 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:47:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:47:05,041 INFO L93 Difference]: Finished difference Result 933 states and 1174 transitions. [2022-02-23 18:47:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:47:05,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 126 [2022-02-23 18:47:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:47:05,055 INFO L225 Difference]: With dead ends: 933 [2022-02-23 18:47:05,055 INFO L226 Difference]: Without dead ends: 921 [2022-02-23 18:47:05,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:47:05,056 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:47:05,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 115 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:47:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-02-23 18:47:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 695. [2022-02-23 18:47:05,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 468 states have (on average 1.1752136752136753) internal successors, (550), 470 states have internal predecessors, (550), 153 states have call successors, (153), 75 states have call predecessors, (153), 73 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2022-02-23 18:47:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 853 transitions. [2022-02-23 18:47:05,093 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 853 transitions. Word has length 126 [2022-02-23 18:47:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:47:05,095 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 853 transitions. [2022-02-23 18:47:05,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:47:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 853 transitions. [2022-02-23 18:47:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-23 18:47:05,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:47:05,098 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:47:05,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-23 18:47:05,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:05,312 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:47:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:47:05,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1722143882, now seen corresponding path program 3 times [2022-02-23 18:47:05,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:47:05,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106766495] [2022-02-23 18:47:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:47:05,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:47:05,322 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:47:05,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190407100] [2022-02-23 18:47:05,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:47:05,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:05,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:47:05,323 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) [2022-02-23 18:47:05,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 18:47:05,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 18:47:05,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:47:05,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 18:47:05,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:47:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-02-23 18:47:05,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:47:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-02-23 18:47:05,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:47:05,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106766495] [2022-02-23 18:47:05,781 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:47:05,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190407100] [2022-02-23 18:47:05,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190407100] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:47:05,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:47:05,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-02-23 18:47:05,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200456461] [2022-02-23 18:47:05,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:47:05,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 18:47:05,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:47:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 18:47:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:47:05,783 INFO L87 Difference]: Start difference. First operand 695 states and 853 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-23 18:47:05,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:47:05,875 INFO L93 Difference]: Finished difference Result 769 states and 909 transitions. [2022-02-23 18:47:05,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 18:47:05,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 128 [2022-02-23 18:47:05,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:47:05,878 INFO L225 Difference]: With dead ends: 769 [2022-02-23 18:47:05,878 INFO L226 Difference]: Without dead ends: 755 [2022-02-23 18:47:05,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:47:05,879 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:47:05,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 152 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:47:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-02-23 18:47:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 539. [2022-02-23 18:47:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 362 states have (on average 1.1049723756906078) internal successors, (400), 373 states have internal predecessors, (400), 103 states have call successors, (103), 74 states have call predecessors, (103), 73 states have return successors, (101), 91 states have call predecessors, (101), 101 states have call successors, (101) [2022-02-23 18:47:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 604 transitions. [2022-02-23 18:47:05,888 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 604 transitions. Word has length 128 [2022-02-23 18:47:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:47:05,889 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 604 transitions. [2022-02-23 18:47:05,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-23 18:47:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 604 transitions. [2022-02-23 18:47:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-02-23 18:47:05,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:47:05,891 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:47:05,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 18:47:06,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:06,107 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:47:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:47:06,108 INFO L85 PathProgramCache]: Analyzing trace with hash -206704767, now seen corresponding path program 2 times [2022-02-23 18:47:06,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:47:06,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281621684] [2022-02-23 18:47:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:47:06,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:47:06,115 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:47:06,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567703885] [2022-02-23 18:47:06,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:47:06,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:06,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:47:06,119 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) [2022-02-23 18:47:06,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 18:47:06,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:47:06,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:47:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-23 18:47:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:47:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 18:47:06,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:47:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-02-23 18:47:07,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:47:07,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281621684] [2022-02-23 18:47:07,025 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:47:07,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567703885] [2022-02-23 18:47:07,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567703885] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:47:07,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:47:07,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-02-23 18:47:07,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525170344] [2022-02-23 18:47:07,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:47:07,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 18:47:07,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:47:07,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 18:47:07,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-23 18:47:07,027 INFO L87 Difference]: Start difference. First operand 539 states and 604 transitions. Second operand has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-02-23 18:47:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:47:07,492 INFO L93 Difference]: Finished difference Result 816 states and 923 transitions. [2022-02-23 18:47:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-23 18:47:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) Word has length 224 [2022-02-23 18:47:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:47:07,495 INFO L225 Difference]: With dead ends: 816 [2022-02-23 18:47:07,496 INFO L226 Difference]: Without dead ends: 816 [2022-02-23 18:47:07,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=965, Unknown=0, NotChecked=0, Total=1482 [2022-02-23 18:47:07,496 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 349 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:47:07,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 486 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:47:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-02-23 18:47:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 815. [2022-02-23 18:47:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 548 states have (on average 1.1131386861313868) internal successors, (610), 565 states have internal predecessors, (610), 157 states have call successors, (157), 110 states have call predecessors, (157), 109 states have return successors, (155), 139 states have call predecessors, (155), 155 states have call successors, (155) [2022-02-23 18:47:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 922 transitions. [2022-02-23 18:47:07,509 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 922 transitions. Word has length 224 [2022-02-23 18:47:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:47:07,509 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 922 transitions. [2022-02-23 18:47:07,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.916666666666667) internal successors, (142), 24 states have internal predecessors, (142), 22 states have call successors, (68), 17 states have call predecessors, (68), 16 states have return successors, (66), 20 states have call predecessors, (66), 20 states have call successors, (66) [2022-02-23 18:47:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 922 transitions. [2022-02-23 18:47:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-02-23 18:47:07,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:47:07,512 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 17, 16, 16, 16, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:47:07,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 18:47:07,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:07,731 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:47:07,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:47:07,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1664620565, now seen corresponding path program 3 times [2022-02-23 18:47:07,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:47:07,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705210693] [2022-02-23 18:47:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:47:07,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:47:07,741 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:47:07,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864137842] [2022-02-23 18:47:07,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:47:07,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:07,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:47:07,743 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:47:07,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 18:47:08,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-02-23 18:47:08,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:47:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-23 18:47:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:47:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 2247 proven. 69 refuted. 0 times theorem prover too weak. 2344 trivial. 0 not checked. [2022-02-23 18:47:08,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:47:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4660 backedges. 491 proven. 85 refuted. 0 times theorem prover too weak. 4084 trivial. 0 not checked. [2022-02-23 18:47:10,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:47:10,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705210693] [2022-02-23 18:47:10,447 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:47:10,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864137842] [2022-02-23 18:47:10,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864137842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:47:10,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:47:10,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2022-02-23 18:47:10,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561570139] [2022-02-23 18:47:10,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:47:10,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 18:47:10,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:47:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 18:47:10,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:47:10,448 INFO L87 Difference]: Start difference. First operand 815 states and 922 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-02-23 18:47:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:47:10,839 INFO L93 Difference]: Finished difference Result 923 states and 1075 transitions. [2022-02-23 18:47:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 18:47:10,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) Word has length 308 [2022-02-23 18:47:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:47:10,843 INFO L225 Difference]: With dead ends: 923 [2022-02-23 18:47:10,843 INFO L226 Difference]: Without dead ends: 731 [2022-02-23 18:47:10,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 603 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:47:10,844 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 19 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:47:10,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 376 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:47:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-02-23 18:47:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2022-02-23 18:47:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 491 states have (on average 1.1079429735234216) internal successors, (544), 505 states have internal predecessors, (544), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-02-23 18:47:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 820 transitions. [2022-02-23 18:47:10,857 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 820 transitions. Word has length 308 [2022-02-23 18:47:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:47:10,857 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 820 transitions. [2022-02-23 18:47:10,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 11 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (47), 11 states have call predecessors, (47), 11 states have call successors, (47) [2022-02-23 18:47:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 820 transitions. [2022-02-23 18:47:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-02-23 18:47:10,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:47:10,861 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:47:10,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-02-23 18:47:11,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:11,075 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:47:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:47:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1611585699, now seen corresponding path program 2 times [2022-02-23 18:47:11,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:47:11,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773629851] [2022-02-23 18:47:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:47:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:47:11,084 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:47:11,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747955236] [2022-02-23 18:47:11,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:47:11,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:47:11,095 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:47:11,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-23 18:47:11,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:47:11,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:47:11,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 18:47:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:47:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 2220 proven. 1910 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2022-02-23 18:47:11,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:47:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 96 proven. 290 refuted. 0 times theorem prover too weak. 4746 trivial. 0 not checked. [2022-02-23 18:47:12,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:47:12,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773629851] [2022-02-23 18:47:12,185 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:47:12,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747955236] [2022-02-23 18:47:12,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747955236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:47:12,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:47:12,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-02-23 18:47:12,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491621796] [2022-02-23 18:47:12,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:47:12,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 18:47:12,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:47:12,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 18:47:12,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-23 18:47:12,189 INFO L87 Difference]: Start difference. First operand 731 states and 820 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-02-23 18:47:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:47:12,705 INFO L93 Difference]: Finished difference Result 733 states and 813 transitions. [2022-02-23 18:47:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-23 18:47:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) Word has length 320 [2022-02-23 18:47:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:47:12,708 INFO L225 Difference]: With dead ends: 733 [2022-02-23 18:47:12,708 INFO L226 Difference]: Without dead ends: 733 [2022-02-23 18:47:12,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 616 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-02-23 18:47:12,709 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 261 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:47:12,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 446 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:47:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-02-23 18:47:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 733. [2022-02-23 18:47:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 493 states have (on average 1.0892494929006085) internal successors, (537), 507 states have internal predecessors, (537), 139 states have call successors, (139), 101 states have call predecessors, (139), 100 states have return successors, (137), 124 states have call predecessors, (137), 137 states have call successors, (137) [2022-02-23 18:47:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 813 transitions. [2022-02-23 18:47:12,720 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 813 transitions. Word has length 320 [2022-02-23 18:47:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:47:12,720 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 813 transitions. [2022-02-23 18:47:12,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 22 states have call successors, (68), 13 states have call predecessors, (68), 13 states have return successors, (66), 21 states have call predecessors, (66), 21 states have call successors, (66) [2022-02-23 18:47:12,721 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 813 transitions. [2022-02-23 18:47:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-02-23 18:47:12,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:47:12,724 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 14, 13, 13, 13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:47:12,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-23 18:47:12,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:12,942 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:47:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:47:12,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1950046478, now seen corresponding path program 4 times [2022-02-23 18:47:12,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:47:12,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743366156] [2022-02-23 18:47:12,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:47:12,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:47:12,956 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:47:12,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942123853] [2022-02-23 18:47:12,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:47:12,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:47:12,957 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:47:12,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-23 18:47:29,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:47:29,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:47:29,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 18:47:29,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:47:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 2016 proven. 246 refuted. 0 times theorem prover too weak. 2776 trivial. 0 not checked. [2022-02-23 18:47:30,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:47:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5038 backedges. 389 proven. 217 refuted. 0 times theorem prover too weak. 4432 trivial. 0 not checked. [2022-02-23 18:47:31,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:47:31,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743366156] [2022-02-23 18:47:31,843 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:47:31,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942123853] [2022-02-23 18:47:31,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942123853] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:47:31,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:47:31,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-02-23 18:47:31,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741775743] [2022-02-23 18:47:31,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:47:31,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 18:47:31,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:47:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 18:47:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:47:31,846 INFO L87 Difference]: Start difference. First operand 733 states and 813 transitions. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-02-23 18:47:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:47:32,074 INFO L93 Difference]: Finished difference Result 793 states and 900 transitions. [2022-02-23 18:47:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:47:32,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) Word has length 320 [2022-02-23 18:47:32,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:47:32,076 INFO L225 Difference]: With dead ends: 793 [2022-02-23 18:47:32,077 INFO L226 Difference]: Without dead ends: 705 [2022-02-23 18:47:32,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 623 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:47:32,077 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 12 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:47:32,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 873 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:47:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-02-23 18:47:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 705. [2022-02-23 18:47:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 474 states have (on average 1.0864978902953586) internal successors, (515), 487 states have internal predecessors, (515), 133 states have call successors, (133), 98 states have call predecessors, (133), 97 states have return successors, (131), 119 states have call predecessors, (131), 131 states have call successors, (131) [2022-02-23 18:47:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 779 transitions. [2022-02-23 18:47:32,087 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 779 transitions. Word has length 320 [2022-02-23 18:47:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:47:32,088 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 779 transitions. [2022-02-23 18:47:32,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 15 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (70), 15 states have call predecessors, (70), 15 states have call successors, (70) [2022-02-23 18:47:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 779 transitions. [2022-02-23 18:47:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-02-23 18:47:32,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:47:32,090 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:47:32,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-23 18:47:32,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-23 18:47:32,303 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:47:32,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:47:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash 179823329, now seen corresponding path program 5 times [2022-02-23 18:47:32,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:47:32,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41454671] [2022-02-23 18:47:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:47:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:47:32,312 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:47:32,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704279425] [2022-02-23 18:47:32,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 18:47:32,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:32,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:47:32,313 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:47:32,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-23 18:47:48,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-02-23 18:47:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:47:48,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-23 18:47:49,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:47:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 1571 proven. 329 refuted. 0 times theorem prover too weak. 3296 trivial. 0 not checked. [2022-02-23 18:47:49,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:47:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 397 proven. 239 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-02-23 18:47:55,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:47:55,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41454671] [2022-02-23 18:47:55,083 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:47:55,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704279425] [2022-02-23 18:47:55,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704279425] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:47:55,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:47:55,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-02-23 18:47:55,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950912523] [2022-02-23 18:47:55,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:47:55,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 18:47:55,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:47:55,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 18:47:55,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-02-23 18:47:55,085 INFO L87 Difference]: Start difference. First operand 705 states and 779 transitions. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-02-23 18:47:55,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:47:55,318 INFO L93 Difference]: Finished difference Result 777 states and 884 transitions. [2022-02-23 18:47:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:47:55,319 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) Word has length 324 [2022-02-23 18:47:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:47:55,321 INFO L225 Difference]: With dead ends: 777 [2022-02-23 18:47:55,321 INFO L226 Difference]: Without dead ends: 677 [2022-02-23 18:47:55,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 626 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-02-23 18:47:55,321 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 25 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:47:55,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 527 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:47:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-02-23 18:47:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2022-02-23 18:47:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 455 states have (on average 1.0835164835164834) internal successors, (493), 467 states have internal predecessors, (493), 127 states have call successors, (127), 95 states have call predecessors, (127), 94 states have return successors, (125), 114 states have call predecessors, (125), 125 states have call successors, (125) [2022-02-23 18:47:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2022-02-23 18:47:55,351 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 324 [2022-02-23 18:47:55,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:47:55,352 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2022-02-23 18:47:55,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 17 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 17 states have call predecessors, (80), 17 states have call successors, (80) [2022-02-23 18:47:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2022-02-23 18:47:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-02-23 18:47:55,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:47:55,354 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 12, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:47:55,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-23 18:47:55,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-23 18:47:55,566 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:47:55,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:47:55,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1085750924, now seen corresponding path program 6 times [2022-02-23 18:47:55,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:47:55,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580451091] [2022-02-23 18:47:55,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:47:55,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:47:55,585 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:47:55,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362346329] [2022-02-23 18:47:55,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 18:47:55,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:47:55,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:47:55,588 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:47:55,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-23 18:47:55,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-02-23 18:47:55,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:47:55,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 115 conjunts are in the unsatisfiable core [2022-02-23 18:47:55,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:47:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 1317 proven. 541 refuted. 0 times theorem prover too weak. 3512 trivial. 0 not checked. [2022-02-23 18:47:57,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:48:23,632 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:50:01,267 WARN L232 SmtUtils]: Spent 34.01s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)