/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:28:20,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:28:20,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:28:20,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:28:20,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:28:20,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:28:20,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:28:20,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:28:20,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:28:20,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:28:20,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:28:20,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:28:20,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:28:20,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:28:20,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:28:20,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:28:20,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:28:20,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:28:20,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:28:20,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:28:20,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:28:20,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:28:20,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:28:20,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:28:20,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:28:20,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:28:20,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:28:20,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:28:20,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:28:20,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:28:20,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:28:20,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:28:20,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:28:20,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:28:20,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:28:20,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:28:20,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:28:20,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:28:20,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:28:20,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:28:20,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:28:20,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:28:20,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:28:20,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:28:20,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:28:20,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:28:20,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:28:20,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:28:20,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:28:20,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:28:20,365 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:28:20,365 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:28:20,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:28:20,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:28:20,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:28:20,575 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:28:20,575 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:28:20,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-02-23 18:28:20,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203268e9e/b50b315184394e3e9d08feb08a6a1cac/FLAG886bf2924 [2022-02-23 18:28:20,929 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:28:20,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-02-23 18:28:20,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203268e9e/b50b315184394e3e9d08feb08a6a1cac/FLAG886bf2924 [2022-02-23 18:28:21,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203268e9e/b50b315184394e3e9d08feb08a6a1cac [2022-02-23 18:28:21,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:28:21,383 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:28:21,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:28:21,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:28:21,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:28:21,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12fbc02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21, skipping insertion in model container [2022-02-23 18:28:21,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:28:21,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:28:21,640 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2022-02-23 18:28:21,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:28:21,663 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:28:21,671 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2022-02-23 18:28:21,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:28:21,693 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:28:21,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21 WrapperNode [2022-02-23 18:28:21,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:28:21,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:28:21,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:28:21,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:28:21,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:28:21,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:28:21,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:28:21,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:28:21,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:28:21,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:28:21,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 18:28:21,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 18:28:21,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:28:21,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:28:21,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:28:21,805 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:28:21,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:28:21,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:28:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:28:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:28:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:28:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:28:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 18:28:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:28:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:28:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:28:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:28:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:28:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:28:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:28:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:28:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:28:21,855 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:28:21,856 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:28:21,963 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:28:21,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:28:21,966 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 18:28:21,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:28:21 BoogieIcfgContainer [2022-02-23 18:28:21,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:28:21,968 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:28:21,968 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:28:21,972 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:28:21,974 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:28:21" (1/1) ... [2022-02-23 18:28:21,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:28:21 BasicIcfg [2022-02-23 18:28:21,993 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:28:21,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:28:21,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:28:21,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:28:21,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:28:21" (1/4) ... [2022-02-23 18:28:21,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff99b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:28:21, skipping insertion in model container [2022-02-23 18:28:21,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:21" (2/4) ... [2022-02-23 18:28:21,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff99b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:28:21, skipping insertion in model container [2022-02-23 18:28:21,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:28:21" (3/4) ... [2022-02-23 18:28:21,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff99b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:28:21, skipping insertion in model container [2022-02-23 18:28:21,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:28:21" (4/4) ... [2022-02-23 18:28:21,999 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.cJordan [2022-02-23 18:28:22,002 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:28:22,003 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:28:22,038 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:28:22,044 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 18:28:22,044 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:28:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:28:22,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 18:28:22,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:28:22,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:28:22,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:28:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:28:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-02-23 18:28:22,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:28:22,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254838848] [2022-02-23 18:28:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:22,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:28:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:28:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:28:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 18:28:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 18:28:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:28:22,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:28:22,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254838848] [2022-02-23 18:28:22,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254838848] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:28:22,243 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:28:22,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:28:22,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893160674] [2022-02-23 18:28:22,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:28:22,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:28:22,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:28:22,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:28:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:28:22,263 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 18:28:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:28:22,334 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-02-23 18:28:22,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:28:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-23 18:28:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:28:22,340 INFO L225 Difference]: With dead ends: 38 [2022-02-23 18:28:22,340 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 18:28:22,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:28:22,346 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:28:22,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:28:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 18:28:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-23 18:28:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 18:28:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-02-23 18:28:22,369 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-02-23 18:28:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:28:22,369 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-02-23 18:28:22,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 18:28:22,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-02-23 18:28:22,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 18:28:22,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:28:22,370 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:28:22,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:28:22,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:28:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:28:22,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-02-23 18:28:22,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:28:22,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984047372] [2022-02-23 18:28:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:22,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:28:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:28:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:28:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 18:28:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 18:28:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:28:22,459 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:28:22,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984047372] [2022-02-23 18:28:22,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984047372] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:28:22,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:28:22,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:28:22,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386459493] [2022-02-23 18:28:22,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:28:22,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:28:22,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:28:22,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:28:22,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:28:22,461 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 18:28:22,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:28:22,620 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-02-23 18:28:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:28:22,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-02-23 18:28:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:28:22,621 INFO L225 Difference]: With dead ends: 44 [2022-02-23 18:28:22,621 INFO L226 Difference]: Without dead ends: 44 [2022-02-23 18:28:22,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:28:22,622 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:28:22,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:28:22,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-23 18:28:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-23 18:28:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 18:28:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-23 18:28:22,629 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-02-23 18:28:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:28:22,629 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-23 18:28:22,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 18:28:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-23 18:28:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 18:28:22,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:28:22,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:28:22,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 18:28:22,630 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:28:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:28:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-02-23 18:28:22,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:28:22,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094455560] [2022-02-23 18:28:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:22,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:28:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:28:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:28:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 18:28:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 18:28:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-02-23 18:28:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:28:22,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:28:22,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094455560] [2022-02-23 18:28:22,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094455560] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:28:22,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:28:22,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:28:22,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839564697] [2022-02-23 18:28:22,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:28:22,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:28:22,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:28:22,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:28:22,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:28:22,778 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:28:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:28:22,938 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-02-23 18:28:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:28:22,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-23 18:28:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:28:22,940 INFO L225 Difference]: With dead ends: 48 [2022-02-23 18:28:22,940 INFO L226 Difference]: Without dead ends: 48 [2022-02-23 18:28:22,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:28:22,941 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:28:22,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:28:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-23 18:28:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-02-23 18:28:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 18:28:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-02-23 18:28:22,946 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-02-23 18:28:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:28:22,947 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-02-23 18:28:22,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:28:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-02-23 18:28:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-23 18:28:22,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:28:22,948 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:28:22,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 18:28:22,948 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:28:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:28:22,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-02-23 18:28:22,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:28:22,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139239780] [2022-02-23 18:28:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:22,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:28:22,967 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:28:22,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677014442] [2022-02-23 18:28:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:22,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:28:22,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:28:23,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:28:23,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 18:28:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:23,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 18:28:23,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:28:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-23 18:28:23,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:28:23,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:28:23,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139239780] [2022-02-23 18:28:23,204 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:28:23,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677014442] [2022-02-23 18:28:23,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677014442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:28:23,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:28:23,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 18:28:23,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568193891] [2022-02-23 18:28:23,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:28:23,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 18:28:23,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:28:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 18:28:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:28:23,206 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 18:28:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:28:23,285 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-02-23 18:28:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 18:28:23,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-02-23 18:28:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:28:23,286 INFO L225 Difference]: With dead ends: 56 [2022-02-23 18:28:23,287 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 18:28:23,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:28:23,288 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:28:23,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:28:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 18:28:23,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-23 18:28:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-23 18:28:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-23 18:28:23,293 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-02-23 18:28:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:28:23,293 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-23 18:28:23,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 18:28:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-23 18:28:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 18:28:23,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:28:23,295 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:28:23,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 18:28:23,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:28:23,508 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:28:23,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:28:23,509 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-02-23 18:28:23,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:28:23,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97656703] [2022-02-23 18:28:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:23,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:28:23,519 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:28:23,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942486495] [2022-02-23 18:28:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:23,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:28:23,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:28:23,532 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:28:23,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 18:28:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:23,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 18:28:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:28:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-23 18:28:23,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:28:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:28:23,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:28:23,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97656703] [2022-02-23 18:28:23,979 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:28:23,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942486495] [2022-02-23 18:28:23,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942486495] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:28:23,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:28:23,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-23 18:28:23,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140407674] [2022-02-23 18:28:23,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:28:23,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:28:23,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:28:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:28:23,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:28:23,981 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:28:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:28:24,016 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-02-23 18:28:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:28:24,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-02-23 18:28:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:28:24,017 INFO L225 Difference]: With dead ends: 66 [2022-02-23 18:28:24,017 INFO L226 Difference]: Without dead ends: 66 [2022-02-23 18:28:24,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:28:24,018 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:28:24,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:28:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-23 18:28:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-02-23 18:28:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 18:28:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-02-23 18:28:24,023 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-02-23 18:28:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:28:24,023 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-02-23 18:28:24,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:28:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-02-23 18:28:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 18:28:24,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:28:24,024 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:28:24,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 18:28:24,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:28:24,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:28:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:28:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-02-23 18:28:24,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:28:24,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702991019] [2022-02-23 18:28:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:24,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:28:24,249 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:28:24,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907389815] [2022-02-23 18:28:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:24,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:28:24,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:28:24,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:28:24,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 18:28:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:24,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 18:28:24,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:28:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-02-23 18:28:24,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:28:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-02-23 18:28:24,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:28:24,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702991019] [2022-02-23 18:28:24,564 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:28:24,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907389815] [2022-02-23 18:28:24,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907389815] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:28:24,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:28:24,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 18:28:24,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902378871] [2022-02-23 18:28:24,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:28:24,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:28:24,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:28:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:28:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:28:24,565 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:28:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:28:24,685 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-02-23 18:28:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:28:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-02-23 18:28:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:28:24,686 INFO L225 Difference]: With dead ends: 74 [2022-02-23 18:28:24,686 INFO L226 Difference]: Without dead ends: 74 [2022-02-23 18:28:24,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:28:24,687 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:28:24,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:28:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-23 18:28:24,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-02-23 18:28:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 18:28:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-02-23 18:28:24,691 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-02-23 18:28:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:28:24,692 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-02-23 18:28:24,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:28:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-02-23 18:28:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-23 18:28:24,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:28:24,693 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:28:24,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 18:28:24,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:28:24,909 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:28:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:28:24,909 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-02-23 18:28:24,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:28:24,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705684019] [2022-02-23 18:28:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:24,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:28:24,917 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:28:24,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619431644] [2022-02-23 18:28:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:24,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:28:24,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:28:24,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:28:24,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 18:28:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:24,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:28:24,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:28:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 18:28:25,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:28:25,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:28:25,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705684019] [2022-02-23 18:28:25,107 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:28:25,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619431644] [2022-02-23 18:28:25,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619431644] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:28:25,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:28:25,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:28:25,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584091630] [2022-02-23 18:28:25,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:28:25,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:28:25,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:28:25,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:28:25,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:28:25,109 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-02-23 18:28:25,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:28:25,156 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-02-23 18:28:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:28:25,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 56 [2022-02-23 18:28:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:28:25,157 INFO L225 Difference]: With dead ends: 77 [2022-02-23 18:28:25,157 INFO L226 Difference]: Without dead ends: 72 [2022-02-23 18:28:25,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:28:25,158 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:28:25,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:28:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-23 18:28:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-02-23 18:28:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-23 18:28:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-02-23 18:28:25,163 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-02-23 18:28:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:28:25,163 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-02-23 18:28:25,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-02-23 18:28:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-02-23 18:28:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-23 18:28:25,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:28:25,164 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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] [2022-02-23 18:28:25,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 18:28:25,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:28:25,384 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:28:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:28:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2022-02-23 18:28:25,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:28:25,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439188779] [2022-02-23 18:28:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:25,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:28:25,394 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:28:25,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815439713] [2022-02-23 18:28:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:28:25,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:28:25,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:28:25,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:28:25,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 18:28:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:28:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 18:28:25,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:28:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-02-23 18:28:25,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:29:01,986 WARN L232 SmtUtils]: Spent 22.98s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:30:18,140 WARN L232 SmtUtils]: Spent 25.57s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:31:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-02-23 18:31:09,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:31:09,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439188779] [2022-02-23 18:31:09,536 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:31:09,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815439713] [2022-02-23 18:31:09,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815439713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:31:09,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:31:09,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-02-23 18:31:09,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637757381] [2022-02-23 18:31:09,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:31:09,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 18:31:09,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:31:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 18:31:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=239, Unknown=2, NotChecked=0, Total=306 [2022-02-23 18:31:09,537 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-02-23 18:31:11,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:31:13,689 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:31:27,378 WARN L232 SmtUtils]: Spent 13.41s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:31:43,795 WARN L232 SmtUtils]: Spent 15.11s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:31:45,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:31:52,406 WARN L232 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 58 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:31:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:31:59,049 INFO L93 Difference]: Finished difference Result 121 states and 157 transitions. [2022-02-23 18:31:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 18:31:59,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-02-23 18:31:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:31:59,051 INFO L225 Difference]: With dead ends: 121 [2022-02-23 18:31:59,051 INFO L226 Difference]: Without dead ends: 121 [2022-02-23 18:31:59,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 94.0s TimeCoverageRelationStatistics Valid=136, Invalid=512, Unknown=2, NotChecked=0, Total=650 [2022-02-23 18:31:59,052 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 68 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 142 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:31:59,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 284 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 359 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2022-02-23 18:31:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-23 18:31:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2022-02-23 18:31:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-23 18:31:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-02-23 18:31:59,068 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-02-23 18:31:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:31:59,068 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-02-23 18:31:59,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-02-23 18:31:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-02-23 18:31:59,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-23 18:31:59,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:31:59,071 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:31:59,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-23 18:31:59,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:31:59,272 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:31:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:31:59,273 INFO L85 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2022-02-23 18:31:59,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:31:59,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725279505] [2022-02-23 18:31:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:31:59,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:31:59,291 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:31:59,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097507692] [2022-02-23 18:31:59,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:31:59,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:31:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:31:59,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:31:59,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 18:31:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:31:59,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 18:31:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:31:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-02-23 18:31:59,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:31:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-02-23 18:31:59,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:31:59,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725279505] [2022-02-23 18:31:59,884 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:31:59,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097507692] [2022-02-23 18:31:59,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097507692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:31:59,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:31:59,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-02-23 18:31:59,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438201261] [2022-02-23 18:31:59,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:31:59,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:31:59,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:31:59,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:31:59,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:31:59,885 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 18:31:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:31:59,973 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2022-02-23 18:31:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:31:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-02-23 18:31:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:31:59,974 INFO L225 Difference]: With dead ends: 114 [2022-02-23 18:31:59,974 INFO L226 Difference]: Without dead ends: 114 [2022-02-23 18:31:59,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:31:59,975 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:31:59,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:31:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-23 18:31:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-02-23 18:31:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-23 18:31:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-02-23 18:31:59,981 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-02-23 18:31:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:31:59,981 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-02-23 18:31:59,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 18:31:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-02-23 18:31:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-23 18:31:59,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:31:59,982 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:31:59,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 18:32:00,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:32:00,196 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:32:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:32:00,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1406960063, now seen corresponding path program 2 times [2022-02-23 18:32:00,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:32:00,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764374463] [2022-02-23 18:32:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:32:00,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:32:00,203 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:32:00,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029993455] [2022-02-23 18:32:00,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:32:00,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:32:00,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:32:00,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:32:00,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 18:32:00,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:32:00,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:32:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:32:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:32:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-02-23 18:32:00,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:32:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-02-23 18:32:00,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:32:00,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764374463] [2022-02-23 18:32:00,557 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:32:00,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029993455] [2022-02-23 18:32:00,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029993455] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:32:00,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:32:00,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-02-23 18:32:00,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412291653] [2022-02-23 18:32:00,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:32:00,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:32:00,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:32:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:32:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:32:00,559 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-23 18:32:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:32:00,606 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2022-02-23 18:32:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 18:32:00,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-02-23 18:32:00,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:32:00,608 INFO L225 Difference]: With dead ends: 111 [2022-02-23 18:32:00,608 INFO L226 Difference]: Without dead ends: 111 [2022-02-23 18:32:00,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:32:00,608 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:32:00,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 139 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:32:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-23 18:32:00,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-02-23 18:32:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-23 18:32:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-02-23 18:32:00,614 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-02-23 18:32:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:32:00,614 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-02-23 18:32:00,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-23 18:32:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-02-23 18:32:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 18:32:00,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:32:00,615 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:32:00,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 18:32:00,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:32:00,827 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:32:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:32:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash 966352941, now seen corresponding path program 1 times [2022-02-23 18:32:00,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:32:00,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499947717] [2022-02-23 18:32:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:32:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:32:00,834 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:32:00,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088038051] [2022-02-23 18:32:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:32:00,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:32:00,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:32:00,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:32:00,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 18:32:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:32:00,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 18:32:00,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:32:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-02-23 18:32:01,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:32:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-02-23 18:32:01,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:32:01,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499947717] [2022-02-23 18:32:01,446 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:32:01,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088038051] [2022-02-23 18:32:01,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088038051] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:32:01,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:32:01,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-02-23 18:32:01,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393916999] [2022-02-23 18:32:01,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:32:01,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 18:32:01,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:32:01,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 18:32:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:32:01,447 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-23 18:32:01,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:32:01,607 INFO L93 Difference]: Finished difference Result 117 states and 146 transitions. [2022-02-23 18:32:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:32:01,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-02-23 18:32:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:32:01,608 INFO L225 Difference]: With dead ends: 117 [2022-02-23 18:32:01,608 INFO L226 Difference]: Without dead ends: 102 [2022-02-23 18:32:01,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:32:01,609 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:32:01,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 283 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:32:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-23 18:32:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-02-23 18:32:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-23 18:32:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-02-23 18:32:01,614 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-02-23 18:32:01,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:32:01,614 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-02-23 18:32:01,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-02-23 18:32:01,614 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-02-23 18:32:01,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-23 18:32:01,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:32:01,614 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:32:01,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 18:32:01,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 18:32:01,815 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:32:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:32:01,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1871497790, now seen corresponding path program 1 times [2022-02-23 18:32:01,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:32:01,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382828427] [2022-02-23 18:32:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:32:01,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:32:01,822 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:32:01,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14415948] [2022-02-23 18:32:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:32:01,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:32:01,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:32:01,825 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:32:01,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 18:32:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:32:01,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 18:32:01,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:32:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-02-23 18:32:01,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:32:01,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:32:01,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382828427] [2022-02-23 18:32:01,997 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:32:01,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14415948] [2022-02-23 18:32:01,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14415948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:32:01,998 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:32:01,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:32:01,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409484510] [2022-02-23 18:32:01,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:32:01,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:32:01,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:32:01,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:32:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:32:01,999 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-23 18:32:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:32:02,034 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-02-23 18:32:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:32:02,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-02-23 18:32:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:32:02,036 INFO L225 Difference]: With dead ends: 104 [2022-02-23 18:32:02,036 INFO L226 Difference]: Without dead ends: 104 [2022-02-23 18:32:02,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:32:02,036 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:32:02,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 96 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:32:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-23 18:32:02,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-02-23 18:32:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-23 18:32:02,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-02-23 18:32:02,041 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-02-23 18:32:02,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:32:02,041 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-02-23 18:32:02,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-23 18:32:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-02-23 18:32:02,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-23 18:32:02,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:32:02,042 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:32:02,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 18:32:02,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:32:02,274 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:32:02,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:32:02,274 INFO L85 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 3 times [2022-02-23 18:32:02,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:32:02,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010797118] [2022-02-23 18:32:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:32:02,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:32:02,280 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:32:02,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311947898] [2022-02-23 18:32:02,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:32:02,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:32:02,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:32:02,300 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:32:02,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 18:32:02,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 18:32:02,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:32:02,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 53 conjunts are in the unsatisfiable core [2022-02-23 18:32:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:32:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-02-23 18:32:03,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:32:46,689 WARN L232 SmtUtils]: Spent 30.75s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:34:04,262 WARN L232 SmtUtils]: Spent 20.99s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:34:41,815 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 (mod c_main_~B~0 4294967296)) (.cse19 (div c_main_~p~0 2)) (.cse21 (< c_main_~d~0 0)) (.cse4 (= (mod c_main_~d~0 2) 0)) (.cse2 (div c_main_~d~0 2))) (let ((.cse3 (+ .cse2 1)) (.cse0 (and .cse21 (not .cse4))) (.cse13 (mod c_main_~A~0 4294967296)) (.cse9 (* .cse8 .cse19)) (.cse5 (= (mod c_main_~p~0 2) 0)) (.cse6 (< c_main_~p~0 0))) (and (let ((.cse20 (+ .cse19 1))) (let ((.cse1 (* .cse20 .cse8))) (or (and (or .cse0 (not (= .cse1 .cse2))) (or (not (= .cse3 .cse1)) .cse4)) .cse5 (not .cse6) (let ((.cse18 (div .cse20 2)) (.cse14 (= (mod .cse20 2) 0))) (let ((.cse15 (not .cse14)) (.cse16 (* (+ c_main_~q~0 .cse18 .cse19 1) .cse8)) (.cse10 (* (- 1) (div .cse1 2))) (.cse11 (* .cse8 (+ c_main_~q~0 .cse18 2 .cse19))) (.cse12 (* (- 1) .cse1)) (.cse7 (div (+ .cse8 .cse9) 2)) (.cse17 (= (mod .cse1 2) 0))) (and (or (not (<= (+ .cse7 .cse8 .cse9 1) c_main_~r~0)) (and (or (= (+ (- 1) .cse10 .cse11 c_main_~r~0 .cse12) .cse13) .cse14) (or .cse15 (= (+ (- 1) .cse10 c_main_~r~0 .cse16 .cse12) .cse13))) .cse17) (or (and (or .cse15 (= .cse13 (+ .cse10 c_main_~r~0 .cse16 .cse12))) (or (= .cse13 (+ .cse10 .cse11 c_main_~r~0 .cse12)) .cse14)) (not (<= (+ .cse7 .cse8 .cse9) c_main_~r~0)) (not .cse17)))))))) (or (and (or (not (= .cse3 .cse9)) .cse4 (not .cse21)) (or .cse0 (not (= .cse2 .cse9)))) (let ((.cse30 (= (mod .cse19 2) 0)) (.cse22 (div .cse9 2)) (.cse32 (div .cse19 2))) (let ((.cse31 (* .cse8 (+ c_main_~q~0 .cse19 .cse32 1))) (.cse27 (* (- 1) .cse22)) (.cse28 (* (- 1) .cse9)) (.cse29 (* .cse8 (+ c_main_~q~0 .cse19 .cse32))) (.cse25 (not .cse30)) (.cse23 (= (mod .cse9 2) 0)) (.cse24 (< .cse9 0))) (and (or (not (<= (+ .cse9 .cse22) c_main_~r~0)) (and (not .cse23) .cse24) (let ((.cse26 (< .cse19 0))) (and (or (and .cse25 .cse26) (= (+ .cse27 .cse28 .cse29 c_main_~r~0) .cse13)) (or (not .cse26) .cse30 (= .cse13 (+ .cse31 .cse27 .cse28 c_main_~r~0)))))) (or (and (or .cse30 (= .cse13 (+ (- 1) .cse31 .cse27 .cse28 c_main_~r~0))) (or (= (+ (- 1) .cse27 .cse28 .cse29 c_main_~r~0) .cse13) .cse25)) .cse23 (not (<= (+ .cse9 1 .cse22) c_main_~r~0)) (not .cse24))))) (and (not .cse5) .cse6))))) is different from false [2022-02-23 18:40:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 61 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 16 not checked. [2022-02-23 18:40:30,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:40:30,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010797118] [2022-02-23 18:40:30,893 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:40:30,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311947898] [2022-02-23 18:40:30,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311947898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:40:30,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:40:30,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-02-23 18:40:30,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579984546] [2022-02-23 18:40:30,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:40:30,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 18:40:30,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:40:30,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 18:40:30,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=4, NotChecked=42, Total=552 [2022-02-23 18:40:30,895 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2022-02-23 18:40:32,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:40:37,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:41:10,074 WARN L232 SmtUtils]: Spent 29.62s on a formula simplification. DAG size of input: 200 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:41:15,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:41:26,444 WARN L232 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 99 DAG size of output: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:41:28,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:42:52,420 WARN L232 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 155 DAG size of output: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)