/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/egcd-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 17:59:30,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 17:59:30,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 17:59:30,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 17:59:30,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 17:59:30,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 17:59:30,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 17:59:30,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 17:59:30,595 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 17:59:30,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 17:59:30,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 17:59:30,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 17:59:30,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 17:59:30,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 17:59:30,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 17:59:30,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 17:59:30,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 17:59:30,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 17:59:30,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 17:59:30,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 17:59:30,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 17:59:30,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 17:59:30,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 17:59:30,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 17:59:30,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 17:59:30,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 17:59:30,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 17:59:30,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 17:59:30,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 17:59:30,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 17:59:30,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 17:59:30,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 17:59:30,629 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 17:59:30,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 17:59:30,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 17:59:30,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 17:59:30,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 17:59:30,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 17:59:30,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 17:59:30,630 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 17:59:30,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 17:59:30,630 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 17:59:30,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 17:59:30,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 17:59:30,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 17:59:30,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 17:59:30,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 17:59:30,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:59:30,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 17:59:30,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 17:59:30,632 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 17:59:30,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 17:59:30,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 17:59:30,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 17:59:30,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 17:59:30,892 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 17:59:30,893 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 17:59:30,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2022-02-23 17:59:30,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d03dd70f6/dfabb7d5759f4bd7b4d29bf5eff65558/FLAG3a1b540c4 [2022-02-23 17:59:31,374 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 17:59:31,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2022-02-23 17:59:31,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d03dd70f6/dfabb7d5759f4bd7b4d29bf5eff65558/FLAG3a1b540c4 [2022-02-23 17:59:31,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d03dd70f6/dfabb7d5759f4bd7b4d29bf5eff65558 [2022-02-23 17:59:31,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 17:59:31,764 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 17:59:31,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 17:59:31,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 17:59:31,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 17:59:31,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:59:31" (1/1) ... [2022-02-23 17:59:31,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77fdca91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:31, skipping insertion in model container [2022-02-23 17:59:31,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:59:31" (1/1) ... [2022-02-23 17:59:31,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 17:59:31,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 17:59:32,007 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/egcd-ll_unwindbound5.c[489,502] [2022-02-23 17:59:32,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:59:32,050 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 17:59:32,062 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/egcd-ll_unwindbound5.c[489,502] [2022-02-23 17:59:32,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:59:32,096 INFO L208 MainTranslator]: Completed translation [2022-02-23 17:59:32,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32 WrapperNode [2022-02-23 17:59:32,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 17:59:32,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 17:59:32,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 17:59:32,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 17:59:32,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32" (1/1) ... [2022-02-23 17:59:32,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32" (1/1) ... [2022-02-23 17:59:32,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32" (1/1) ... [2022-02-23 17:59:32,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32" (1/1) ... [2022-02-23 17:59:32,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32" (1/1) ... [2022-02-23 17:59:32,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32" (1/1) ... [2022-02-23 17:59:32,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32" (1/1) ... [2022-02-23 17:59:32,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 17:59:32,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 17:59:32,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 17:59:32,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 17:59:32,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32" (1/1) ... [2022-02-23 17:59:32,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:59:32,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:32,181 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 17:59:32,204 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 17:59:32,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 17:59:32,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 17:59:32,229 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 17:59:32,229 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 17:59:32,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 17:59:32,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 17:59:32,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 17:59:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 17:59:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 17:59:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 17:59:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 17:59:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 17:59:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 17:59:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 17:59:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 17:59:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 17:59:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 17:59:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 17:59:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 17:59:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 17:59:32,297 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 17:59:32,299 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 17:59:32,463 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 17:59:32,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 17:59:32,469 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 17:59:32,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:59:32 BoogieIcfgContainer [2022-02-23 17:59:32,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 17:59:32,471 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 17:59:32,471 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 17:59:32,488 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 17:59:32,491 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:59:32" (1/1) ... [2022-02-23 17:59:32,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:59:32 BasicIcfg [2022-02-23 17:59:32,520 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 17:59:32,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 17:59:32,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 17:59:32,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 17:59:32,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:59:31" (1/4) ... [2022-02-23 17:59:32,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71046354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:59:32, skipping insertion in model container [2022-02-23 17:59:32,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:32" (2/4) ... [2022-02-23 17:59:32,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71046354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:59:32, skipping insertion in model container [2022-02-23 17:59:32,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:59:32" (3/4) ... [2022-02-23 17:59:32,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71046354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:59:32, skipping insertion in model container [2022-02-23 17:59:32,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:59:32" (4/4) ... [2022-02-23 17:59:32,527 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound5.cJordan [2022-02-23 17:59:32,531 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 17:59:32,532 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 17:59:32,584 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 17:59:32,592 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 17:59:32,593 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 17:59:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 17:59:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 17:59:32,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:32,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:32,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2022-02-23 17:59:32,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:32,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800287717] [2022-02-23 17:59:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:32,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:32,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 17:59:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:32,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 17:59:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:32,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 17:59:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:59:32,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:32,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800287717] [2022-02-23 17:59:32,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800287717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:59:32,910 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:59:32,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 17:59:32,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618625710] [2022-02-23 17:59:32,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:59:32,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 17:59:32,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:32,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 17:59:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:59:32,947 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:59:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:33,049 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-02-23 17:59:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 17:59:33,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-02-23 17:59:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:33,058 INFO L225 Difference]: With dead ends: 36 [2022-02-23 17:59:33,058 INFO L226 Difference]: Without dead ends: 31 [2022-02-23 17:59:33,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 17:59:33,063 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:33,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:59:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-23 17:59:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-02-23 17:59:33,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 17:59:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-02-23 17:59:33,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2022-02-23 17:59:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:33,098 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-02-23 17:59:33,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:59:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-02-23 17:59:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 17:59:33,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:33,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:33,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 17:59:33,101 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:33,102 INFO L85 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2022-02-23 17:59:33,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:33,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760776654] [2022-02-23 17:59:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:33,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:33,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 17:59:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:33,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 17:59:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:33,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 17:59:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:59:33,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:33,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760776654] [2022-02-23 17:59:33,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760776654] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:59:33,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:59:33,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:59:33,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758242474] [2022-02-23 17:59:33,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:59:33,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:59:33,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:59:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:59:33,224 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:59:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:33,348 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-02-23 17:59:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 17:59:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 17:59:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:33,351 INFO L225 Difference]: With dead ends: 32 [2022-02-23 17:59:33,351 INFO L226 Difference]: Without dead ends: 32 [2022-02-23 17:59:33,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 17:59:33,357 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:33,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:59:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-23 17:59:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-23 17:59:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 17:59:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-02-23 17:59:33,379 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2022-02-23 17:59:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:33,380 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-02-23 17:59:33,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:59:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-02-23 17:59:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 17:59:33,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:33,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:33,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 17:59:33,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2022-02-23 17:59:33,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:33,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213855402] [2022-02-23 17:59:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:33,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:33,411 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:33,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453782422] [2022-02-23 17:59:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:33,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:33,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:33,419 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 17:59:33,448 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 17:59:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 17:59:33,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:59:33,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:59:33,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:33,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213855402] [2022-02-23 17:59:33,679 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:33,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453782422] [2022-02-23 17:59:33,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453782422] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:59:33,682 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:59:33,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:59:33,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870254712] [2022-02-23 17:59:33,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:59:33,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:59:33,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:33,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:59:33,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:59:33,686 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:59:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:33,741 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-02-23 17:59:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:59:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-23 17:59:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:33,743 INFO L225 Difference]: With dead ends: 47 [2022-02-23 17:59:33,743 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 17:59:33,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 17:59:33,744 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:33,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 155 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:59:33,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 17:59:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-02-23 17:59:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-23 17:59:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-02-23 17:59:33,757 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2022-02-23 17:59:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:33,757 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-02-23 17:59:33,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:59:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-02-23 17:59:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 17:59:33,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:33,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:33,787 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 17:59:33,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:33,984 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:33,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2022-02-23 17:59:33,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:33,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040737190] [2022-02-23 17:59:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:33,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:33,996 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:33,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864809446] [2022-02-23 17:59:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:33,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:33,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:33,998 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 17:59:34,024 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 17:59:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:34,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 17:59:34,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 17:59:34,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:59:34,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:34,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040737190] [2022-02-23 17:59:34,267 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:34,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864809446] [2022-02-23 17:59:34,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864809446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 17:59:34,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:59:34,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-23 17:59:34,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706109509] [2022-02-23 17:59:34,272 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 17:59:34,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:59:34,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:59:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 17:59:34,274 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 17:59:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:34,378 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-02-23 17:59:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 17:59:34,379 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-02-23 17:59:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:34,381 INFO L225 Difference]: With dead ends: 51 [2022-02-23 17:59:34,381 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 17:59:34,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:59:34,384 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:34,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 209 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:59:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 17:59:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-23 17:59:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-23 17:59:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-02-23 17:59:34,396 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 28 [2022-02-23 17:59:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:34,397 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-02-23 17:59:34,397 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), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 17:59:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-02-23 17:59:34,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 17:59:34,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:34,399 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:34,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 17:59:34,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-23 17:59:34,616 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2022-02-23 17:59:34,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:34,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202765093] [2022-02-23 17:59:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:34,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:34,631 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:34,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150187479] [2022-02-23 17:59:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:34,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:34,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:34,633 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 17:59:34,635 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 17:59:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 17:59:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-23 17:59:34,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:59:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 17:59:35,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:35,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202765093] [2022-02-23 17:59:35,003 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:35,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150187479] [2022-02-23 17:59:35,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150187479] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 17:59:35,003 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:59:35,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-02-23 17:59:35,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706570268] [2022-02-23 17:59:35,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:59:35,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:59:35,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:59:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 17:59:35,005 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 17:59:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:35,046 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2022-02-23 17:59:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:59:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-23 17:59:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:35,049 INFO L225 Difference]: With dead ends: 73 [2022-02-23 17:59:35,049 INFO L226 Difference]: Without dead ends: 71 [2022-02-23 17:59:35,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 17:59:35,049 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:35,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:59:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-23 17:59:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-02-23 17:59:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 40 states have internal predecessors, (48), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-23 17:59:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-02-23 17:59:35,057 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 33 [2022-02-23 17:59:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:35,057 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-02-23 17:59:35,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 17:59:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-02-23 17:59:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 17:59:35,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:35,058 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:35,086 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 17:59:35,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:35,275 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2022-02-23 17:59:35,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:35,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489149016] [2022-02-23 17:59:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:35,286 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:35,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756765364] [2022-02-23 17:59:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:35,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:35,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:35,288 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 17:59:35,311 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 17:59:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 17:59:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 17:59:35,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:59:35,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:35,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489149016] [2022-02-23 17:59:35,447 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:35,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756765364] [2022-02-23 17:59:35,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756765364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:59:35,448 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:59:35,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:59:35,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800746116] [2022-02-23 17:59:35,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:59:35,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:59:35,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:35,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:59:35,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:59:35,449 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-23 17:59:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:35,479 INFO L93 Difference]: Finished difference Result 85 states and 121 transitions. [2022-02-23 17:59:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:59:35,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-02-23 17:59:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:35,481 INFO L225 Difference]: With dead ends: 85 [2022-02-23 17:59:35,481 INFO L226 Difference]: Without dead ends: 85 [2022-02-23 17:59:35,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 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 17:59:35,482 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:35,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:59:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-23 17:59:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2022-02-23 17:59:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 23 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-23 17:59:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-02-23 17:59:35,490 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 39 [2022-02-23 17:59:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:35,491 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-02-23 17:59:35,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-23 17:59:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-02-23 17:59:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 17:59:35,492 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:35,492 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:35,512 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 17:59:35,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:35,704 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:35,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2022-02-23 17:59:35,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:35,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641012388] [2022-02-23 17:59:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:35,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:35,714 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:35,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242243744] [2022-02-23 17:59:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:35,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:35,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:35,716 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 17:59:35,758 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 17:59:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:35,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 17:59:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 17:59:35,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:59:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 17:59:36,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:36,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641012388] [2022-02-23 17:59:36,037 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:36,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242243744] [2022-02-23 17:59:36,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242243744] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:59:36,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:59:36,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 17:59:36,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843069255] [2022-02-23 17:59:36,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:59:36,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:59:36,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:36,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:59:36,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:59:36,039 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-02-23 17:59:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:36,142 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2022-02-23 17:59:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 17:59:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 42 [2022-02-23 17:59:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:36,145 INFO L225 Difference]: With dead ends: 202 [2022-02-23 17:59:36,145 INFO L226 Difference]: Without dead ends: 200 [2022-02-23 17:59:36,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:59:36,146 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:36,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 176 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:59:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-23 17:59:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2022-02-23 17:59:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 120 states have internal predecessors, (133), 63 states have call successors, (63), 23 states have call predecessors, (63), 21 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-23 17:59:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2022-02-23 17:59:36,163 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 251 transitions. Word has length 42 [2022-02-23 17:59:36,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:36,163 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 251 transitions. [2022-02-23 17:59:36,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-02-23 17:59:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 251 transitions. [2022-02-23 17:59:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 17:59:36,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:36,165 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2022-02-23 17:59:36,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 17:59:36,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:36,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:36,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1627394196, now seen corresponding path program 1 times [2022-02-23 17:59:36,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:36,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501556890] [2022-02-23 17:59:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:36,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:36,383 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:36,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944851280] [2022-02-23 17:59:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:36,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:36,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:36,385 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 17:59:36,408 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 17:59:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 17:59:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-02-23 17:59:36,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:59:36,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:36,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501556890] [2022-02-23 17:59:36,594 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:36,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944851280] [2022-02-23 17:59:36,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944851280] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:59:36,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:59:36,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:59:36,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964898187] [2022-02-23 17:59:36,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:59:36,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:59:36,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:59:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:59:36,596 INFO L87 Difference]: Start difference. First operand 194 states and 251 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 17:59:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:36,650 INFO L93 Difference]: Finished difference Result 206 states and 260 transitions. [2022-02-23 17:59:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:59:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-02-23 17:59:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:36,657 INFO L225 Difference]: With dead ends: 206 [2022-02-23 17:59:36,657 INFO L226 Difference]: Without dead ends: 203 [2022-02-23 17:59:36,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 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 17:59:36,657 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 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 17:59:36,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:59:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-02-23 17:59:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-02-23 17:59:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 129 states have internal predecessors, (142), 60 states have call successors, (60), 26 states have call predecessors, (60), 24 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-02-23 17:59:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 254 transitions. [2022-02-23 17:59:36,688 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 254 transitions. Word has length 42 [2022-02-23 17:59:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:36,689 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 254 transitions. [2022-02-23 17:59:36,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 17:59:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 254 transitions. [2022-02-23 17:59:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 17:59:36,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:36,690 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:36,708 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 17:59:36,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:36,891 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:36,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:36,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2022-02-23 17:59:36,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:36,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147138864] [2022-02-23 17:59:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:36,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:36,900 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:36,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302552236] [2022-02-23 17:59:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:36,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:36,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:36,902 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 17:59:36,908 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 17:59:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:36,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 17:59:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-02-23 17:59:37,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:59:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-02-23 17:59:37,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:37,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147138864] [2022-02-23 17:59:37,212 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:37,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302552236] [2022-02-23 17:59:37,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302552236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:59:37,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:59:37,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 17:59:37,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673856430] [2022-02-23 17:59:37,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:59:37,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 17:59:37,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 17:59:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-23 17:59:37,216 INFO L87 Difference]: Start difference. First operand 203 states and 254 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 17:59:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:37,346 INFO L93 Difference]: Finished difference Result 230 states and 285 transitions. [2022-02-23 17:59:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 17:59:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-02-23 17:59:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:37,348 INFO L225 Difference]: With dead ends: 230 [2022-02-23 17:59:37,348 INFO L226 Difference]: Without dead ends: 216 [2022-02-23 17:59:37,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-23 17:59:37,349 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:37,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 147 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:59:37,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-23 17:59:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2022-02-23 17:59:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 128 states have (on average 1.1640625) internal successors, (149), 139 states have internal predecessors, (149), 59 states have call successors, (59), 27 states have call predecessors, (59), 26 states have return successors, (54), 47 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-23 17:59:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 262 transitions. [2022-02-23 17:59:37,364 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 262 transitions. Word has length 44 [2022-02-23 17:59:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:37,364 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 262 transitions. [2022-02-23 17:59:37,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-23 17:59:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 262 transitions. [2022-02-23 17:59:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 17:59:37,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:37,365 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 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 17:59:37,392 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 17:59:37,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:37,588 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 2 times [2022-02-23 17:59:37,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:37,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905453037] [2022-02-23 17:59:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:37,597 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:37,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280326673] [2022-02-23 17:59:37,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 17:59:37,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:37,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:37,599 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 17:59:37,601 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 17:59:37,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 17:59:37,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:59:37,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 17:59:37,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:59:37,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:59:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:59:37,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:37,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905453037] [2022-02-23 17:59:37,967 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:37,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280326673] [2022-02-23 17:59:37,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280326673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:59:37,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:59:37,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-23 17:59:37,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545851975] [2022-02-23 17:59:37,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:59:37,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:59:37,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:37,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:59:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:59:37,969 INFO L87 Difference]: Start difference. First operand 214 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-02-23 17:59:38,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:38,439 INFO L93 Difference]: Finished difference Result 251 states and 310 transitions. [2022-02-23 17:59:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 17:59:38,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 47 [2022-02-23 17:59:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:38,442 INFO L225 Difference]: With dead ends: 251 [2022-02-23 17:59:38,442 INFO L226 Difference]: Without dead ends: 229 [2022-02-23 17:59:38,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:59:38,443 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:38,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 238 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 17:59:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-23 17:59:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2022-02-23 17:59:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.126865671641791) internal successors, (151), 142 states have internal predecessors, (151), 47 states have call successors, (47), 29 states have call predecessors, (47), 28 states have return successors, (42), 38 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 17:59:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 240 transitions. [2022-02-23 17:59:38,456 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 240 transitions. Word has length 47 [2022-02-23 17:59:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:38,457 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 240 transitions. [2022-02-23 17:59:38,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-02-23 17:59:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 240 transitions. [2022-02-23 17:59:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-23 17:59:38,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:38,458 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-02-23 17:59:38,483 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 17:59:38,659 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,SelfDestructingSolverStorable9 [2022-02-23 17:59:38,659 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:38,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2022-02-23 17:59:38,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:38,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913213297] [2022-02-23 17:59:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:38,669 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:38,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876327840] [2022-02-23 17:59:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:38,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:38,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:38,671 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 17:59:38,672 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 17:59:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:59:38,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 17:59:38,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-23 17:59:39,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:59:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-02-23 17:59:39,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:39,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913213297] [2022-02-23 17:59:39,150 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:39,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876327840] [2022-02-23 17:59:39,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876327840] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 17:59:39,150 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:59:39,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-02-23 17:59:39,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398592990] [2022-02-23 17:59:39,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:59:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:59:39,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:59:39,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:59:39,152 INFO L87 Difference]: Start difference. First operand 210 states and 240 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 17:59:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:39,185 INFO L93 Difference]: Finished difference Result 214 states and 242 transitions. [2022-02-23 17:59:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:59:39,186 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2022-02-23 17:59:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:39,190 INFO L225 Difference]: With dead ends: 214 [2022-02-23 17:59:39,190 INFO L226 Difference]: Without dead ends: 192 [2022-02-23 17:59:39,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-23 17:59:39,191 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:39,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 111 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:59:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-23 17:59:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-02-23 17:59:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 125 states have (on average 1.112) internal successors, (139), 129 states have internal predecessors, (139), 38 states have call successors, (38), 26 states have call predecessors, (38), 25 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-02-23 17:59:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 212 transitions. [2022-02-23 17:59:39,201 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 212 transitions. Word has length 61 [2022-02-23 17:59:39,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:39,201 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 212 transitions. [2022-02-23 17:59:39,201 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 17:59:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 212 transitions. [2022-02-23 17:59:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-23 17:59:39,209 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:39,209 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:39,237 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 17:59:39,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:39,434 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1503864962, now seen corresponding path program 2 times [2022-02-23 17:59:39,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:39,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912750537] [2022-02-23 17:59:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:39,443 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:39,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681648410] [2022-02-23 17:59:39,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 17:59:39,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:39,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:39,445 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 17:59:39,447 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 17:59:39,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 17:59:39,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:59:39,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 17:59:39,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:59:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 17:59:39,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:59:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-02-23 17:59:39,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:59:39,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912750537] [2022-02-23 17:59:39,873 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:59:39,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681648410] [2022-02-23 17:59:39,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681648410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:59:39,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:59:39,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-02-23 17:59:39,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982494251] [2022-02-23 17:59:39,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:59:39,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:59:39,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:59:39,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:59:39,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:59:39,875 INFO L87 Difference]: Start difference. First operand 189 states and 212 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) [2022-02-23 17:59:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:59:39,968 INFO L93 Difference]: Finished difference Result 242 states and 272 transitions. [2022-02-23 17:59:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 17:59:39,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) Word has length 99 [2022-02-23 17:59:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:59:39,971 INFO L225 Difference]: With dead ends: 242 [2022-02-23 17:59:39,971 INFO L226 Difference]: Without dead ends: 242 [2022-02-23 17:59:39,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-02-23 17:59:39,972 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 18 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:59:39,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 150 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:59:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-23 17:59:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-02-23 17:59:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 160 states have (on average 1.10625) internal successors, (177), 165 states have internal predecessors, (177), 49 states have call successors, (49), 33 states have call predecessors, (49), 32 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-23 17:59:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 272 transitions. [2022-02-23 17:59:39,992 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 272 transitions. Word has length 99 [2022-02-23 17:59:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:59:39,993 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 272 transitions. [2022-02-23 17:59:39,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (29), 5 states have call predecessors, (29), 6 states have call successors, (29) [2022-02-23 17:59:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 272 transitions. [2022-02-23 17:59:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-23 17:59:39,995 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:59:39,995 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:40,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 17:59:40,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 17:59:40,220 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:59:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:59:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1621622896, now seen corresponding path program 3 times [2022-02-23 17:59:40,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:59:40,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968600337] [2022-02-23 17:59:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:59:40,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:59:40,237 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:59:40,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557177873] [2022-02-23 17:59:40,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 17:59:40,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:59:40,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:59:40,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:59:40,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 17:59:40,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-23 17:59:40,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-02-23 17:59:40,314 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-23 17:59:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 17:59:40,385 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-23 17:59:40,385 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-23 17:59:40,386 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 17:59:40,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 17:59:40,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 17:59:40,614 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:59:40,617 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 17:59:40,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:59:40 BasicIcfg [2022-02-23 17:59:40,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 17:59:40,665 INFO L158 Benchmark]: Toolchain (without parser) took 8901.28ms. Allocated memory was 199.2MB in the beginning and 310.4MB in the end (delta: 111.1MB). Free memory was 142.9MB in the beginning and 166.1MB in the end (delta: -23.2MB). Peak memory consumption was 88.3MB. Max. memory is 8.0GB. [2022-02-23 17:59:40,665 INFO L158 Benchmark]: CDTParser took 0.84ms. Allocated memory is still 199.2MB. Free memory is still 159.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 17:59:40,666 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.06ms. Allocated memory was 199.2MB in the beginning and 310.4MB in the end (delta: 111.1MB). Free memory was 142.7MB in the beginning and 281.7MB in the end (delta: -139.0MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-02-23 17:59:40,666 INFO L158 Benchmark]: Boogie Preprocessor took 44.53ms. Allocated memory is still 310.4MB. Free memory was 281.7MB in the beginning and 280.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 17:59:40,666 INFO L158 Benchmark]: RCFGBuilder took 326.57ms. Allocated memory is still 310.4MB. Free memory was 280.4MB in the beginning and 269.5MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 17:59:40,666 INFO L158 Benchmark]: IcfgTransformer took 48.61ms. Allocated memory is still 310.4MB. Free memory was 269.5MB in the beginning and 268.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 17:59:40,666 INFO L158 Benchmark]: TraceAbstraction took 8143.76ms. Allocated memory is still 310.4MB. Free memory was 267.8MB in the beginning and 166.1MB in the end (delta: 101.7MB). Peak memory consumption was 101.7MB. Max. memory is 8.0GB. [2022-02-23 17:59:40,667 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84ms. Allocated memory is still 199.2MB. Free memory is still 159.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 332.06ms. Allocated memory was 199.2MB in the beginning and 310.4MB in the end (delta: 111.1MB). Free memory was 142.7MB in the beginning and 281.7MB in the end (delta: -139.0MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.53ms. Allocated memory is still 310.4MB. Free memory was 281.7MB in the beginning and 280.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 326.57ms. Allocated memory is still 310.4MB. Free memory was 280.4MB in the beginning and 269.5MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 48.61ms. Allocated memory is still 310.4MB. Free memory was 269.5MB in the beginning and 268.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 8143.76ms. Allocated memory is still 310.4MB. Free memory was 267.8MB in the beginning and 166.1MB in the end (delta: 101.7MB). Peak memory consumption was 101.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=11, counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=7, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=7, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=7, b=1, counter=0, p=1, q=0, r=0, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=7, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=7, b=1, counter=1, p=1, q=0, r=0, s=1, x=7, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=7, b=1, counter=1, p=1, q=0, r=0, s=1, x=7, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=7, b=1, counter=1, p=1, q=0, r=0, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=7, b=1, counter=1, p=1, q=0, r=0, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=6, b=1, counter=1, p=1, q=0, r=-1, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=6, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=6, b=1, counter=2, p=1, q=0, r=-1, s=1, x=7, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=6, b=1, counter=2, p=1, q=0, r=-1, s=1, x=7, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=6, b=1, counter=2, p=1, q=0, r=-1, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=6, b=1, counter=2, p=1, q=0, r=-1, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=5, b=1, counter=2, p=1, q=0, r=-2, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=1, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=5, b=1, counter=3, p=1, q=0, r=-2, s=1, x=7, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=1, counter=3, p=1, q=0, r=-2, s=1, x=7, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=1, counter=3, p=1, q=0, r=-2, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=5, b=1, counter=3, p=1, q=0, r=-2, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=4, b=1, counter=3, p=1, q=0, r=-3, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=4, b=1, counter=4, counter++=3, p=1, q=0, r=-3, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=4, b=1, counter=4, p=1, q=0, r=-3, s=1, x=7, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=4, b=1, counter=4, p=1, q=0, r=-3, s=1, x=7, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=1, counter=4, p=1, q=0, r=-3, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=4, b=1, counter=4, p=1, q=0, r=-3, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=3, b=1, counter=4, p=1, q=0, r=-4, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, counter=5, counter++=4, p=1, q=0, r=-4, s=1, x=7, y=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=3, b=1, counter=5, p=1, q=0, r=-4, s=1, x=7, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=1, counter=5, p=1, q=0, r=-4, s=1, x=7, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=1, counter=5, p=1, q=0, r=-4, s=1, x=7, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=3, b=1, counter=5, p=1, q=0, r=-4, s=1, x=7, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=2, b=1, counter=5, p=1, q=0, r=-5, s=1, x=7, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, counter=6, counter++=5, p=1, q=0, r=-5, s=1, x=7, y=1] [L34] COND FALSE !(counter++<5) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.0s, OverallIterations: 13, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 225 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 192 mSDsluCounter, 1736 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1248 mSDsCounter, 114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 627 IncrementalHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 114 mSolverCounterUnsat, 488 mSDtfsCounter, 627 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 819 GetRequests, 731 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=242occurred in iteration=12, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 40 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 621 NumberOfCodeBlocks, 621 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 811 ConstructedInterpolants, 0 QuantifiedInterpolants, 2393 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1453 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 18 InterpolantComputations, 7 PerfectInterpolantSequences, 790/1151 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-23 17:59:40,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...