/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/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 17:01:24,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 17:01:24,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 17:01:24,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 17:01:24,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 17:01:24,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 17:01:24,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 17:01:24,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 17:01:24,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 17:01:24,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 17:01:24,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 17:01:24,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 17:01:24,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 17:01:24,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 17:01:24,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 17:01:24,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 17:01:24,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 17:01:24,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 17:01:24,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 17:01:24,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 17:01:24,366 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 17:01:24,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 17:01:24,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 17:01:24,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 17:01:24,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 17:01:24,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 17:01:24,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 17:01:24,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 17:01:24,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 17:01:24,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 17:01:24,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 17:01:24,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 17:01:24,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 17:01:24,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 17:01:24,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 17:01:24,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 17:01:24,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 17:01:24,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 17:01:24,397 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 17:01:24,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 17:01:24,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 17:01:24,399 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 17:01:24,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 17:01:24,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 17:01:24,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 17:01:24,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 17:01:24,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 17:01:24,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 17:01:24,400 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 17:01:24,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 17:01:24,400 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 17:01:24,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 17:01:24,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 17:01:24,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 17:01:24,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 17:01:24,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 17:01:24,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:01:24,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 17:01:24,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 17:01:24,402 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 17:01:24,402 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 17:01:24,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 17:01:24,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 17:01:24,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 17:01:24,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 17:01:24,623 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 17:01:24,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-03-17 17:01:24,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64daac4c8/534098e34bd244bf91229c633927e41c/FLAG00f5b8473 [2022-03-17 17:01:25,052 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 17:01:25,053 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-03-17 17:01:25,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64daac4c8/534098e34bd244bf91229c633927e41c/FLAG00f5b8473 [2022-03-17 17:01:25,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64daac4c8/534098e34bd244bf91229c633927e41c [2022-03-17 17:01:25,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 17:01:25,445 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 17:01:25,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 17:01:25,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 17:01:25,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 17:01:25,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38abf3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25, skipping insertion in model container [2022-03-17 17:01:25,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 17:01:25,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 17:01:25,634 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/egcd2-ll_valuebound50.c[490,503] [2022-03-17 17:01:25,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:01:25,669 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 17:01:25,685 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/egcd2-ll_valuebound50.c[490,503] [2022-03-17 17:01:25,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:01:25,718 INFO L208 MainTranslator]: Completed translation [2022-03-17 17:01:25,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25 WrapperNode [2022-03-17 17:01:25,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 17:01:25,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 17:01:25,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 17:01:25,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 17:01:25,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 17:01:25,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 17:01:25,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 17:01:25,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 17:01:25,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25" (1/1) ... [2022-03-17 17:01:25,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:01:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:25,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 17:01:25,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 17:01:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 17:01:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 17:01:25,871 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 17:01:25,871 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 17:01:25,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 17:01:25,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 17:01:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 17:01:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 17:01:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 17:01:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 17:01:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 17:01:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 17:01:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 17:01:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 17:01:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 17:01:25,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 17:01:25,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 17:01:25,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 17:01:25,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 17:01:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 17:01:25,925 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 17:01:25,926 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 17:01:26,057 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 17:01:26,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 17:01:26,062 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 17:01:26,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:01:26 BoogieIcfgContainer [2022-03-17 17:01:26,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 17:01:26,080 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 17:01:26,080 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 17:01:26,081 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 17:01:26,083 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:01:26" (1/1) ... [2022-03-17 17:01:26,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:01:26 BasicIcfg [2022-03-17 17:01:26,106 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 17:01:26,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 17:01:26,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 17:01:26,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 17:01:26,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 05:01:25" (1/4) ... [2022-03-17 17:01:26,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61db9584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:01:26, skipping insertion in model container [2022-03-17 17:01:26,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:01:25" (2/4) ... [2022-03-17 17:01:26,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61db9584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:01:26, skipping insertion in model container [2022-03-17 17:01:26,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:01:26" (3/4) ... [2022-03-17 17:01:26,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61db9584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:01:26, skipping insertion in model container [2022-03-17 17:01:26,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:01:26" (4/4) ... [2022-03-17 17:01:26,113 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.cJordan [2022-03-17 17:01:26,116 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 17:01:26,116 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 17:01:26,155 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 17:01:26,160 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 17:01:26,161 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 17:01:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 17:01:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 17:01:26,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:26,182 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:26,183 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-03-17 17:01:26,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:26,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223381199] [2022-03-17 17:01:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:26,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:26,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:01:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:26,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:01:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:26,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 17:01:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:26,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 17:01:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:26,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-17 17:01:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:26,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-17 17:01:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:26,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 17:01:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 17:01:26,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:26,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223381199] [2022-03-17 17:01:26,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223381199] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:01:26,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:01:26,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 17:01:26,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686435844] [2022-03-17 17:01:26,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:01:26,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 17:01:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:26,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 17:01:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:01:26,369 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:01:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:26,428 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-03-17 17:01:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 17:01:26,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-17 17:01:26,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:26,449 INFO L225 Difference]: With dead ends: 40 [2022-03-17 17:01:26,449 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 17:01:26,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:01:26,453 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:26,453 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:01:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 17:01:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 17:01:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 17:01:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-17 17:01:26,485 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-17 17:01:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:26,486 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-17 17:01:26,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:01:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-17 17:01:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 17:01:26,489 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:26,489 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:26,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 17:01:26,490 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:26,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:26,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-03-17 17:01:26,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:26,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489943554] [2022-03-17 17:01:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:26,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:26,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694780339] [2022-03-17 17:01:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:26,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:26,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:26,566 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:26,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 17:01:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:26,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:01:26,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 17:01:26,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 17:01:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:26,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489943554] [2022-03-17 17:01:26,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694780339] [2022-03-17 17:01:26,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694780339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:01:26,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:01:26,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-17 17:01:26,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727996608] [2022-03-17 17:01:26,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:01:26,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 17:01:26,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 17:01:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 17:01:26,940 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:01:27,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:27,015 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-03-17 17:01:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:01:27,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-17 17:01:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:27,016 INFO L225 Difference]: With dead ends: 44 [2022-03-17 17:01:27,017 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 17:01:27,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-17 17:01:27,018 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:27,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:01:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 17:01:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-17 17:01:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 17:01:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-17 17:01:27,024 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-17 17:01:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:27,025 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-17 17:01:27,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:01:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-17 17:01:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 17:01:27,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:27,026 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:27,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 17:01:27,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:27,243 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-03-17 17:01:27,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:27,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935204612] [2022-03-17 17:01:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:27,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:27,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:27,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902247036] [2022-03-17 17:01:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:27,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:27,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:27,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:27,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 17:01:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:27,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 17:01:27,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 17:01:27,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 17:01:27,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:27,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935204612] [2022-03-17 17:01:27,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:27,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902247036] [2022-03-17 17:01:27,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902247036] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:01:27,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:01:27,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 17:01:27,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622629231] [2022-03-17 17:01:27,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:01:27,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:01:27,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:27,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:01:27,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:01:27,512 INFO L87 Difference]: Start difference. First operand 37 states and 48 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-17 17:01:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:27,542 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-03-17 17:01:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:01:27,543 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-17 17:01:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:27,543 INFO L225 Difference]: With dead ends: 41 [2022-03-17 17:01:27,543 INFO L226 Difference]: Without dead ends: 41 [2022-03-17 17:01:27,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:01:27,544 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:27,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:01:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-17 17:01:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-17 17:01:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 17:01:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-17 17:01:27,549 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-03-17 17:01:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:27,549 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-17 17:01:27,549 INFO L479 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-17 17:01:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-17 17:01:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 17:01:27,550 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:27,550 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:27,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 17:01:27,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 17:01:27,767 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:27,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:27,768 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-03-17 17:01:27,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:27,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983219670] [2022-03-17 17:01:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:27,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:27,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:27,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124708592] [2022-03-17 17:01:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:27,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:27,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:27,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 17:01:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:27,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 17:01:27,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 17:01:28,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:28,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983219670] [2022-03-17 17:01:28,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124708592] [2022-03-17 17:01:28,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124708592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 17:01:28,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:01:28,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-17 17:01:28,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651507233] [2022-03-17 17:01:28,091 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 17:01:28,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 17:01:28,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 17:01:28,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:01:28,092 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 17:01:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:28,223 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-17 17:01:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 17:01:28,223 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-17 17:01:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:28,224 INFO L225 Difference]: With dead ends: 52 [2022-03-17 17:01:28,224 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 17:01:28,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:01:28,225 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:28,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:01:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 17:01:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-17 17:01:28,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 17:01:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-03-17 17:01:28,230 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-03-17 17:01:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:28,231 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-03-17 17:01:28,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 17:01:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-03-17 17:01:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 17:01:28,232 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:28,232 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:28,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 17:01:28,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:28,446 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:28,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:28,446 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-03-17 17:01:28,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:28,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934121138] [2022-03-17 17:01:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:28,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:28,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:28,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451620799] [2022-03-17 17:01:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:28,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:28,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:28,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:28,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 17:01:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:28,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 17:01:28,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 17:01:28,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 17:01:28,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:28,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934121138] [2022-03-17 17:01:28,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:28,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451620799] [2022-03-17 17:01:28,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451620799] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:01:28,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:01:28,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 17:01:28,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267692493] [2022-03-17 17:01:28,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:01:28,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:01:28,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:01:28,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:01:28,895 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 17:01:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:28,929 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-03-17 17:01:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:01:28,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-17 17:01:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:28,930 INFO L225 Difference]: With dead ends: 56 [2022-03-17 17:01:28,930 INFO L226 Difference]: Without dead ends: 56 [2022-03-17 17:01:28,931 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:01:28,931 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:28,932 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:01:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-17 17:01:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-17 17:01:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 17:01:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-17 17:01:28,936 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-03-17 17:01:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:28,936 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-17 17:01:28,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 17:01:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-17 17:01:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-17 17:01:28,937 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:28,938 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:28,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 17:01:29,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:29,155 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:29,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-03-17 17:01:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:29,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863672986] [2022-03-17 17:01:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:29,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:29,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157457110] [2022-03-17 17:01:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:29,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:29,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:29,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:29,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 17:01:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 17:01:29,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-17 17:01:29,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:29,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:29,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863672986] [2022-03-17 17:01:29,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:29,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157457110] [2022-03-17 17:01:29,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157457110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 17:01:29,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:01:29,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-17 17:01:29,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731222840] [2022-03-17 17:01:29,479 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 17:01:29,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 17:01:29,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:29,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 17:01:29,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-17 17:01:29,480 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 17:01:29,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:29,546 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-03-17 17:01:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 17:01:29,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-17 17:01:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:29,552 INFO L225 Difference]: With dead ends: 60 [2022-03-17 17:01:29,552 INFO L226 Difference]: Without dead ends: 60 [2022-03-17 17:01:29,552 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:01:29,554 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:29,555 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:01:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-17 17:01:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-17 17:01:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-17 17:01:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-17 17:01:29,565 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-03-17 17:01:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:29,566 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-17 17:01:29,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-17 17:01:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-17 17:01:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-17 17:01:29,567 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:29,567 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:29,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 17:01:29,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:29,772 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:29,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-03-17 17:01:29,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:29,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777281099] [2022-03-17 17:01:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:29,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:29,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:29,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056375888] [2022-03-17 17:01:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:29,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:29,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:29,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:29,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 17:01:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:29,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:01:29,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-17 17:01:29,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-17 17:01:30,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777281099] [2022-03-17 17:01:30,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056375888] [2022-03-17 17:01:30,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056375888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:01:30,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:01:30,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 17:01:30,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856520979] [2022-03-17 17:01:30,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:01:30,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 17:01:30,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:30,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 17:01:30,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 17:01:30,042 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-17 17:01:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:30,192 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-03-17 17:01:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 17:01:30,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-17 17:01:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:30,197 INFO L225 Difference]: With dead ends: 98 [2022-03-17 17:01:30,197 INFO L226 Difference]: Without dead ends: 98 [2022-03-17 17:01:30,197 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:01:30,197 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:30,198 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 281 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:01:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-17 17:01:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-17 17:01:30,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-17 17:01:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-17 17:01:30,204 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-17 17:01:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:30,205 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-17 17:01:30,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-17 17:01:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-17 17:01:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-17 17:01:30,206 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:30,206 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:30,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-17 17:01:30,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:30,425 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-03-17 17:01:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:30,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819740259] [2022-03-17 17:01:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:30,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:30,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532677059] [2022-03-17 17:01:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:30,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:30,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:30,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:30,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 17:01:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 17:01:30,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-17 17:01:30,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-17 17:01:30,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:30,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819740259] [2022-03-17 17:01:30,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:30,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532677059] [2022-03-17 17:01:30,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532677059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:01:30,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:01:30,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-17 17:01:30,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052718120] [2022-03-17 17:01:30,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:01:30,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 17:01:30,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 17:01:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-17 17:01:30,768 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-17 17:01:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:30,942 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2022-03-17 17:01:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 17:01:30,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-03-17 17:01:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:30,945 INFO L225 Difference]: With dead ends: 130 [2022-03-17 17:01:30,945 INFO L226 Difference]: Without dead ends: 128 [2022-03-17 17:01:30,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-17 17:01:30,945 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:30,946 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 329 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:01:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-17 17:01:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-03-17 17:01:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-17 17:01:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-03-17 17:01:30,952 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-03-17 17:01:30,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:30,953 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-03-17 17:01:30,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-17 17:01:30,953 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-03-17 17:01:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-17 17:01:30,954 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:30,954 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:30,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 17:01:31,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:31,171 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:31,172 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-03-17 17:01:31,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:31,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322896325] [2022-03-17 17:01:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:31,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:31,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:31,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906457340] [2022-03-17 17:01:31,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:01:31,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:31,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:31,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 17:01:31,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:01:31,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:01:31,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 17:01:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-17 17:01:31,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-17 17:01:31,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322896325] [2022-03-17 17:01:31,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:31,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906457340] [2022-03-17 17:01:31,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906457340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:01:31,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:01:31,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-17 17:01:31,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778866719] [2022-03-17 17:01:31,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:01:31,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 17:01:31,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:31,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 17:01:31,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-17 17:01:31,773 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-17 17:01:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:33,032 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2022-03-17 17:01:33,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 17:01:33,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-03-17 17:01:33,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:33,034 INFO L225 Difference]: With dead ends: 126 [2022-03-17 17:01:33,034 INFO L226 Difference]: Without dead ends: 126 [2022-03-17 17:01:33,034 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-17 17:01:33,035 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:33,035 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 330 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-17 17:01:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-17 17:01:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-03-17 17:01:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-17 17:01:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-03-17 17:01:33,046 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-03-17 17:01:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:33,047 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-03-17 17:01:33,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-17 17:01:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-03-17 17:01:33,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-17 17:01:33,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:33,063 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:33,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 17:01:33,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 17:01:33,264 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:33,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-03-17 17:01:33,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:33,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652851127] [2022-03-17 17:01:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:33,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:33,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429556208] [2022-03-17 17:01:33,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 17:01:33,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:33,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:33,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:33,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 17:01:33,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 17:01:33,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:01:33,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-17 17:01:33,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 17:01:33,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:33,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:33,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652851127] [2022-03-17 17:01:33,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:33,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429556208] [2022-03-17 17:01:33,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429556208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 17:01:33,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:01:33,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-17 17:01:33,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131371405] [2022-03-17 17:01:33,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 17:01:33,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 17:01:33,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 17:01:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:01:33,759 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-17 17:01:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:33,937 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-03-17 17:01:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 17:01:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-03-17 17:01:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:33,940 INFO L225 Difference]: With dead ends: 142 [2022-03-17 17:01:33,940 INFO L226 Difference]: Without dead ends: 142 [2022-03-17 17:01:33,940 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:01:33,941 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:33,941 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:01:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-17 17:01:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-17 17:01:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-17 17:01:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-03-17 17:01:33,951 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-03-17 17:01:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:33,952 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-03-17 17:01:33,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-17 17:01:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-03-17 17:01:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 17:01:33,953 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:33,953 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:33,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 17:01:34,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 17:01:34,164 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-03-17 17:01:34,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:34,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004409971] [2022-03-17 17:01:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:34,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:34,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:34,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849816762] [2022-03-17 17:01:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:34,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:34,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:34,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:34,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 17:01:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:34,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 17:01:34,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-17 17:01:34,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-17 17:01:34,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:34,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004409971] [2022-03-17 17:01:34,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:34,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849816762] [2022-03-17 17:01:34,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849816762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:01:34,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:01:34,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-17 17:01:34,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941350519] [2022-03-17 17:01:34,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:01:34,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 17:01:34,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:34,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 17:01:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:01:34,870 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 17:01:36,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:01:36,941 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-03-17 17:01:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 17:01:36,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-03-17 17:01:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:01:36,946 INFO L225 Difference]: With dead ends: 226 [2022-03-17 17:01:36,946 INFO L226 Difference]: Without dead ends: 220 [2022-03-17 17:01:36,947 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-17 17:01:36,947 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-17 17:01:36,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 402 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-17 17:01:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-17 17:01:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-17 17:01:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-17 17:01:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-03-17 17:01:36,956 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-03-17 17:01:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:01:36,956 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-03-17 17:01:36,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 17:01:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-03-17 17:01:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-17 17:01:36,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:01:36,957 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:01:36,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 17:01:37,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 17:01:37,174 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:01:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:01:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-03-17 17:01:37,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:01:37,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895519024] [2022-03-17 17:01:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:01:37,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:01:37,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387257135] [2022-03-17 17:01:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:01:37,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:01:37,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:01:37,183 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:01:37,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 17:01:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:01:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-17 17:01:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:01:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-17 17:01:37,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:01:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 85 proven. 37 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-17 17:01:42,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:01:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895519024] [2022-03-17 17:01:42,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:01:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387257135] [2022-03-17 17:01:42,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387257135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:01:42,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:01:42,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-17 17:01:42,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871550557] [2022-03-17 17:01:42,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:01:42,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 17:01:42,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:01:42,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 17:01:42,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=285, Unknown=1, NotChecked=0, Total=380 [2022-03-17 17:01:42,706 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 20 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-17 17:01:51,955 WARN L232 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:01:54,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:01:56,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:01:58,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:26,436 WARN L232 SmtUtils]: Spent 28.11s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:02:28,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:30,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:32,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:36,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:39,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:42,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:44,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:46,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:48,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:51,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.75s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:02:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:54,199 INFO L93 Difference]: Finished difference Result 229 states and 310 transitions. [2022-03-17 17:02:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 17:02:54,199 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 11 states have call successors, (31) Word has length 107 [2022-03-17 17:02:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:54,201 INFO L225 Difference]: With dead ends: 229 [2022-03-17 17:02:54,201 INFO L226 Difference]: Without dead ends: 227 [2022-03-17 17:02:54,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=190, Invalid=562, Unknown=4, NotChecked=0, Total=756 [2022-03-17 17:02:54,201 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 85 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 137 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:54,201 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 335 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 311 Invalid, 12 Unknown, 0 Unchecked, 30.7s Time] [2022-03-17 17:02:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-17 17:02:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2022-03-17 17:02:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 118 states have internal predecessors, (138), 81 states have call successors, (81), 20 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-17 17:02:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 298 transitions. [2022-03-17 17:02:54,210 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 298 transitions. Word has length 107 [2022-03-17 17:02:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:54,210 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 298 transitions. [2022-03-17 17:02:54,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 13 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-17 17:02:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 298 transitions. [2022-03-17 17:02:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-17 17:02:54,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:54,211 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:54,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:54,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 17:02:54,430 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:54,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:54,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1614224774, now seen corresponding path program 2 times [2022-03-17 17:02:54,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:54,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353780611] [2022-03-17 17:02:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:54,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:54,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:54,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598501367] [2022-03-17 17:02:54,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:02:54,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:54,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:54,445 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:02:54,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 17:02:54,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:02:54,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:02:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 17:02:54,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-17 17:02:54,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:02:54,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353780611] [2022-03-17 17:02:54,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598501367] [2022-03-17 17:02:54,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598501367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:02:54,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:02:54,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:02:54,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105630067] [2022-03-17 17:02:54,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:02:54,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:02:54,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:02:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:02:54,675 INFO L87 Difference]: Start difference. First operand 218 states and 298 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-17 17:02:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:54,717 INFO L93 Difference]: Finished difference Result 199 states and 260 transitions. [2022-03-17 17:02:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:02:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 116 [2022-03-17 17:02:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:54,718 INFO L225 Difference]: With dead ends: 199 [2022-03-17 17:02:54,718 INFO L226 Difference]: Without dead ends: 199 [2022-03-17 17:02:54,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 17:02:54,720 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:54,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:02:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-17 17:02:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 123. [2022-03-17 17:02:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-17 17:02:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-03-17 17:02:54,730 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 116 [2022-03-17 17:02:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:54,730 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-03-17 17:02:54,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-03-17 17:02:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-03-17 17:02:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-17 17:02:54,732 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:54,732 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:54,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:54,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 17:02:54,948 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 3 times [2022-03-17 17:02:54,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103816036] [2022-03-17 17:02:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:54,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:54,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:54,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546423866] [2022-03-17 17:02:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 17:02:54,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:54,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:54,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:02:54,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 17:02:55,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 17:02:55,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:02:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-17 17:02:55,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:02:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-17 17:02:55,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:02:56,111 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 17:02:56,118 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 17:02:58,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:02:58,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103816036] [2022-03-17 17:02:58,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:02:58,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546423866] [2022-03-17 17:02:58,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546423866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 17:02:58,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:02:58,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-17 17:02:58,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329337410] [2022-03-17 17:02:58,463 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 17:02:58,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 17:02:58,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:02:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 17:02:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=347, Unknown=1, NotChecked=0, Total=420 [2022-03-17 17:02:58,464 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-17 17:02:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:02:59,140 INFO L93 Difference]: Finished difference Result 196 states and 258 transitions. [2022-03-17 17:02:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 17:02:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) Word has length 138 [2022-03-17 17:02:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:02:59,141 INFO L225 Difference]: With dead ends: 196 [2022-03-17 17:02:59,141 INFO L226 Difference]: Without dead ends: 193 [2022-03-17 17:02:59,141 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=108, Invalid=541, Unknown=1, NotChecked=0, Total=650 [2022-03-17 17:02:59,142 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 34 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 17:02:59,142 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 513 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 17:02:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-17 17:02:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2022-03-17 17:02:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 100 states have (on average 1.13) internal successors, (113), 100 states have internal predecessors, (113), 69 states have call successors, (69), 19 states have call predecessors, (69), 17 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-17 17:02:59,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 249 transitions. [2022-03-17 17:02:59,148 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 249 transitions. Word has length 138 [2022-03-17 17:02:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:02:59,149 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 249 transitions. [2022-03-17 17:02:59,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-17 17:02:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 249 transitions. [2022-03-17 17:02:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-17 17:02:59,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:02:59,150 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:02:59,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 17:02:59,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 17:02:59,351 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:02:59,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:02:59,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 4 times [2022-03-17 17:02:59,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:02:59,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970565933] [2022-03-17 17:02:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:02:59,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:02:59,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:02:59,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467620041] [2022-03-17 17:02:59,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 17:02:59,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:02:59,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:02:59,380 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:02:59,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 17:02:59,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 17:02:59,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:02:59,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-17 17:02:59,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 72 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-03-17 17:03:00,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 72 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2022-03-17 17:03:03,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:03,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970565933] [2022-03-17 17:03:03,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:03,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467620041] [2022-03-17 17:03:03,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467620041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:03:03,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:03:03,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2022-03-17 17:03:03,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085770977] [2022-03-17 17:03:03,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:03:03,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-17 17:03:03,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-17 17:03:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-03-17 17:03:03,352 INFO L87 Difference]: Start difference. First operand 187 states and 249 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) [2022-03-17 17:03:41,258 WARN L232 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 122 DAG size of output: 112 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 17:03:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:41,979 INFO L93 Difference]: Finished difference Result 295 states and 414 transitions. [2022-03-17 17:03:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-17 17:03:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) Word has length 157 [2022-03-17 17:03:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:41,981 INFO L225 Difference]: With dead ends: 295 [2022-03-17 17:03:41,981 INFO L226 Difference]: Without dead ends: 291 [2022-03-17 17:03:41,982 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2022-03-17 17:03:41,982 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 92 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:41,982 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 878 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-03-17 17:03:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-17 17:03:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 259. [2022-03-17 17:03:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 133 states have (on average 1.150375939849624) internal successors, (153), 133 states have internal predecessors, (153), 105 states have call successors, (105), 22 states have call predecessors, (105), 20 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-17 17:03:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 361 transitions. [2022-03-17 17:03:41,999 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 361 transitions. Word has length 157 [2022-03-17 17:03:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:42,000 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 361 transitions. [2022-03-17 17:03:42,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 17 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (49), 13 states have call predecessors, (49), 15 states have call successors, (49) [2022-03-17 17:03:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 361 transitions. [2022-03-17 17:03:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-17 17:03:42,001 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:42,001 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:42,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:42,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:42,221 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 5 times [2022-03-17 17:03:42,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:42,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162402802] [2022-03-17 17:03:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:42,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:42,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:42,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164247902] [2022-03-17 17:03:42,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 17:03:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:42,231 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:03:42,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 17:03:42,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-17 17:03:42,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:03:42,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-17 17:03:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-17 17:03:43,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-17 17:03:45,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:45,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162402802] [2022-03-17 17:03:45,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:45,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164247902] [2022-03-17 17:03:45,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164247902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:03:45,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:03:45,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-17 17:03:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889510733] [2022-03-17 17:03:45,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:03:45,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 17:03:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 17:03:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-03-17 17:03:45,134 INFO L87 Difference]: Start difference. First operand 259 states and 361 transitions. Second operand has 24 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-17 17:04:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:04:28,775 INFO L93 Difference]: Finished difference Result 424 states and 619 transitions. [2022-03-17 17:04:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-17 17:04:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) Word has length 160 [2022-03-17 17:04:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:04:28,777 INFO L225 Difference]: With dead ends: 424 [2022-03-17 17:04:28,777 INFO L226 Difference]: Without dead ends: 420 [2022-03-17 17:04:28,778 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=874, Invalid=3818, Unknown=0, NotChecked=0, Total=4692 [2022-03-17 17:04:28,779 INFO L912 BasicCegarLoop]: 143 mSDtfsCounter, 128 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:04:28,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1353 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 22.2s Time] [2022-03-17 17:04:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-03-17 17:04:28,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 343. [2022-03-17 17:04:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 170 states have (on average 1.1705882352941177) internal successors, (199), 170 states have internal predecessors, (199), 149 states have call successors, (149), 25 states have call predecessors, (149), 23 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-17 17:04:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2022-03-17 17:04:28,794 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 160 [2022-03-17 17:04:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:04:28,794 INFO L478 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2022-03-17 17:04:28,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-17 17:04:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2022-03-17 17:04:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-17 17:04:28,795 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:04:28,795 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:04:28,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-17 17:04:29,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 17:04:29,010 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:04:29,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:04:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash -970371602, now seen corresponding path program 6 times [2022-03-17 17:04:29,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:04:29,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214966334] [2022-03-17 17:04:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:04:29,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:04:29,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:04:29,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745576211] [2022-03-17 17:04:29,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 17:04:29,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:04:29,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:04:29,030 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:04:29,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 17:04:29,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-17 17:04:29,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:04:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-17 17:04:29,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:04:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-17 17:04:30,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:04:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-03-17 17:04:32,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:04:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214966334] [2022-03-17 17:04:32,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:04:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745576211] [2022-03-17 17:04:32,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745576211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:04:32,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:04:32,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-03-17 17:04:32,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964991733] [2022-03-17 17:04:32,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:04:32,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-17 17:04:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:04:32,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-17 17:04:32,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-17 17:04:32,761 INFO L87 Difference]: Start difference. First operand 343 states and 495 transitions. Second operand has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-17 17:05:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:05:15,295 INFO L93 Difference]: Finished difference Result 515 states and 760 transitions. [2022-03-17 17:05:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-17 17:05:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) Word has length 160 [2022-03-17 17:05:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:05:15,297 INFO L225 Difference]: With dead ends: 515 [2022-03-17 17:05:15,297 INFO L226 Difference]: Without dead ends: 511 [2022-03-17 17:05:15,298 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=1108, Invalid=4592, Unknown=0, NotChecked=0, Total=5700 [2022-03-17 17:05:15,299 INFO L912 BasicCegarLoop]: 142 mSDtfsCounter, 129 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:05:15,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 956 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time] [2022-03-17 17:05:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-17 17:05:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 443. [2022-03-17 17:05:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 218 states have (on average 1.1697247706422018) internal successors, (255), 218 states have internal predecessors, (255), 197 states have call successors, (197), 29 states have call predecessors, (197), 27 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2022-03-17 17:05:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 647 transitions. [2022-03-17 17:05:15,310 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 647 transitions. Word has length 160 [2022-03-17 17:05:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:05:15,311 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 647 transitions. [2022-03-17 17:05:15,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 24 states have internal predecessors, (51), 15 states have call successors, (52), 2 states have call predecessors, (52), 1 states have return successors, (49), 13 states have call predecessors, (49), 13 states have call successors, (49) [2022-03-17 17:05:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 647 transitions. [2022-03-17 17:05:15,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-03-17 17:05:15,312 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:05:15,312 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:05:15,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-17 17:05:15,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 17:05:15,530 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:05:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:05:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash -74761106, now seen corresponding path program 7 times [2022-03-17 17:05:15,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:05:15,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274835670] [2022-03-17 17:05:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:05:15,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:05:15,539 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:05:15,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902925215] [2022-03-17 17:05:15,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 17:05:15,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:05:15,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:05:15,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:05:15,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 17:05:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:05:15,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-17 17:05:15,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:05:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 300 proven. 369 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2022-03-17 17:05:17,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:05:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 385 proven. 38 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2022-03-17 17:05:22,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:05:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274835670] [2022-03-17 17:05:22,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:05:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902925215] [2022-03-17 17:05:22,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902925215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:05:22,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:05:22,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 29 [2022-03-17 17:05:22,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2920630] [2022-03-17 17:05:22,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:05:22,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-17 17:05:22,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:05:22,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-17 17:05:22,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-03-17 17:05:22,924 INFO L87 Difference]: Start difference. First operand 443 states and 647 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 18 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (51), 16 states have call predecessors, (51), 16 states have call successors, (51) [2022-03-17 17:05:34,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:05:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:05:40,649 INFO L93 Difference]: Finished difference Result 539 states and 782 transitions. [2022-03-17 17:05:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-17 17:05:40,650 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 18 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (51), 16 states have call predecessors, (51), 16 states have call successors, (51) Word has length 204 [2022-03-17 17:05:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:05:40,650 INFO L225 Difference]: With dead ends: 539 [2022-03-17 17:05:40,650 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 17:05:40,651 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 374 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=516, Invalid=1836, Unknown=0, NotChecked=0, Total=2352 [2022-03-17 17:05:40,651 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 76 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 267 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-03-17 17:05:40,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 857 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1168 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-03-17 17:05:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 17:05:40,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 17:05:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 17:05:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 17:05:40,652 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2022-03-17 17:05:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:05:40,652 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 17:05:40,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 18 states have call successors, (53), 2 states have call predecessors, (53), 2 states have return successors, (51), 16 states have call predecessors, (51), 16 states have call successors, (51) [2022-03-17 17:05:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 17:05:40,653 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 17:05:40,654 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 17:05:40,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 17:05:40,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 17:05:40,866 INFO L718 BasicCegarLoop]: Path program histogram: [7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:05:40,866 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 17:05:40,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:05:40 BasicIcfg [2022-03-17 17:05:40,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 17:05:40,868 INFO L158 Benchmark]: Toolchain (without parser) took 255423.03ms. Allocated memory was 172.0MB in the beginning and 298.8MB in the end (delta: 126.9MB). Free memory was 123.7MB in the beginning and 130.6MB in the end (delta: -6.9MB). Peak memory consumption was 120.9MB. Max. memory is 8.0GB. [2022-03-17 17:05:40,869 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 172.0MB. Free memory is still 140.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 17:05:40,869 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.31ms. Allocated memory is still 172.0MB. Free memory was 123.5MB in the beginning and 149.0MB in the end (delta: -25.5MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. [2022-03-17 17:05:40,869 INFO L158 Benchmark]: Boogie Preprocessor took 38.59ms. Allocated memory is still 172.0MB. Free memory was 149.0MB in the beginning and 148.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 17:05:40,869 INFO L158 Benchmark]: RCFGBuilder took 320.07ms. Allocated memory is still 172.0MB. Free memory was 147.5MB in the beginning and 136.4MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 17:05:40,869 INFO L158 Benchmark]: IcfgTransformer took 25.75ms. Allocated memory is still 172.0MB. Free memory was 136.4MB in the beginning and 134.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 17:05:40,869 INFO L158 Benchmark]: TraceAbstraction took 254761.33ms. Allocated memory was 172.0MB in the beginning and 298.8MB in the end (delta: 126.9MB). Free memory was 134.3MB in the beginning and 130.6MB in the end (delta: 3.7MB). Peak memory consumption was 130.3MB. Max. memory is 8.0GB. [2022-03-17 17:05:40,870 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 172.0MB. Free memory is still 140.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 271.31ms. Allocated memory is still 172.0MB. Free memory was 123.5MB in the beginning and 149.0MB in the end (delta: -25.5MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.59ms. Allocated memory is still 172.0MB. Free memory was 149.0MB in the beginning and 148.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 320.07ms. Allocated memory is still 172.0MB. Free memory was 147.5MB in the beginning and 136.4MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 25.75ms. Allocated memory is still 172.0MB. Free memory was 136.4MB in the beginning and 134.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 254761.33ms. Allocated memory was 172.0MB in the beginning and 298.8MB in the end (delta: 126.9MB). Free memory was 134.3MB in the beginning and 130.6MB in the end (delta: 3.7MB). Peak memory consumption was 130.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 254.7s, OverallIterations: 18, TraceHistogramMax: 29, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 219.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 935 SdHoareTripleChecker+Valid, 91.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 818 mSDsluCounter, 7473 SdHoareTripleChecker+Invalid, 90.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6409 mSDsCounter, 1899 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8366 IncrementalHoareTripleChecker+Invalid, 10278 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1899 mSolverCounterUnsat, 1064 mSDtfsCounter, 8366 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3200 GetRequests, 2749 SyntacticMatches, 24 SemanticMatches, 427 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4132 ImplicationChecksByTransitivity, 141.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=443occurred in iteration=17, InterpolantAutomatonStates: 314, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 344 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 29.9s InterpolantComputationTime, 1739 NumberOfCodeBlocks, 1650 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 2956 ConstructedInterpolants, 0 QuantifiedInterpolants, 20196 SizeOfPredicates, 124 NumberOfNonLiveVariables, 4055 ConjunctsInSsa, 636 ConjunctsInUnsatCore, 30 InterpolantComputations, 4 PerfectInterpolantSequences, 11437/12529 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 17:05:40,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...