/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/cohendiv-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 17:23:29,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 17:23:29,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 17:23:29,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 17:23:29,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 17:23:29,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 17:23:29,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 17:23:29,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 17:23:29,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 17:23:29,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 17:23:29,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 17:23:29,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 17:23:29,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 17:23:29,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 17:23:29,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 17:23:29,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 17:23:29,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 17:23:29,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 17:23:29,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 17:23:29,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 17:23:29,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 17:23:29,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 17:23:29,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 17:23:29,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 17:23:29,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 17:23:29,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 17:23:29,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 17:23:29,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 17:23:29,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 17:23:29,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 17:23:29,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 17:23:29,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 17:23:29,322 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 17:23:29,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 17:23:29,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 17:23:29,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 17:23:29,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 17:23:29,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 17:23:29,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 17:23:29,323 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 17:23:29,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 17:23:29,323 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 17:23:29,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 17:23:29,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 17:23:29,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 17:23:29,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 17:23:29,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 17:23:29,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:23:29,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 17:23:29,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 17:23:29,325 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 17:23:29,325 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 17:23:29,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 17:23:29,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 17:23:29,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 17:23:29,576 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 17:23:29,577 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 17:23:29,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2022-02-23 17:23:29,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d341a80a/deb094b11ae9498a9aed5f0565b9fc43/FLAG068b005c4 [2022-02-23 17:23:30,040 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 17:23:30,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2022-02-23 17:23:30,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d341a80a/deb094b11ae9498a9aed5f0565b9fc43/FLAG068b005c4 [2022-02-23 17:23:30,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d341a80a/deb094b11ae9498a9aed5f0565b9fc43 [2022-02-23 17:23:30,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 17:23:30,448 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 17:23:30,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 17:23:30,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 17:23:30,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 17:23:30,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69649ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30, skipping insertion in model container [2022-02-23 17:23:30,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 17:23:30,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 17:23:30,628 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/cohendiv-ll_unwindbound100.c[576,589] [2022-02-23 17:23:30,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:23:30,647 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 17:23:30,656 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/cohendiv-ll_unwindbound100.c[576,589] [2022-02-23 17:23:30,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:23:30,671 INFO L208 MainTranslator]: Completed translation [2022-02-23 17:23:30,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30 WrapperNode [2022-02-23 17:23:30,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 17:23:30,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 17:23:30,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 17:23:30,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 17:23:30,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 17:23:30,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 17:23:30,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 17:23:30,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 17:23:30,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:23:30,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:30,724 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 17:23:30,748 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 17:23:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 17:23:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 17:23:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 17:23:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 17:23:30,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 17:23:30,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 17:23:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 17:23:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 17:23:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 17:23:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 17:23:30,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 17:23:30,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 17:23:30,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 17:23:30,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 17:23:30,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 17:23:30,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 17:23:30,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 17:23:30,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 17:23:30,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 17:23:30,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 17:23:30,822 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 17:23:30,824 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 17:23:30,961 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 17:23:30,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 17:23:30,966 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 17:23:30,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:23:30 BoogieIcfgContainer [2022-02-23 17:23:30,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 17:23:30,968 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 17:23:30,968 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 17:23:30,969 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 17:23:30,972 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:23:30" (1/1) ... [2022-02-23 17:23:30,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:23:30 BasicIcfg [2022-02-23 17:23:30,985 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 17:23:30,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 17:23:30,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 17:23:30,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 17:23:30,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:23:30" (1/4) ... [2022-02-23 17:23:30,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18717886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:23:30, skipping insertion in model container [2022-02-23 17:23:30,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:23:30" (2/4) ... [2022-02-23 17:23:30,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18717886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:23:30, skipping insertion in model container [2022-02-23 17:23:30,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:23:30" (3/4) ... [2022-02-23 17:23:30,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18717886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:23:30, skipping insertion in model container [2022-02-23 17:23:30,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:23:30" (4/4) ... [2022-02-23 17:23:30,991 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound100.cJordan [2022-02-23 17:23:30,995 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 17:23:30,995 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 17:23:31,055 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 17:23:31,061 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 17:23:31,062 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 17:23:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 17:23:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 17:23:31,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:31,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:31,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:31,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:31,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2022-02-23 17:23:31,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:31,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502549768] [2022-02-23 17:23:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:31,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 17:23:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:31,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 17:23:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 17:23:31,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:31,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502549768] [2022-02-23 17:23:31,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502549768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:31,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:31,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 17:23:31,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457097535] [2022-02-23 17:23:31,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:31,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 17:23:31,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 17:23:31,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:23:31,358 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 17:23:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:31,445 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-02-23 17:23:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 17:23:31,447 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-23 17:23:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:31,457 INFO L225 Difference]: With dead ends: 39 [2022-02-23 17:23:31,457 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 17:23:31,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:23:31,463 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:31,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 17:23:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-02-23 17:23:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 17:23:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-02-23 17:23:31,503 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-02-23 17:23:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:31,503 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-02-23 17:23:31,504 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 17:23:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-02-23 17:23:31,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 17:23:31,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:31,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:31,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 17:23:31,507 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:31,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2022-02-23 17:23:31,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:31,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995076555] [2022-02-23 17:23:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:31,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:31,537 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:31,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637721566] [2022-02-23 17:23:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:31,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:31,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:31,547 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 17:23:31,586 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 17:23:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:31,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 17:23:31,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 17:23:31,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:23:31,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:31,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995076555] [2022-02-23 17:23:31,700 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:31,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637721566] [2022-02-23 17:23:31,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637721566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:31,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:31,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 17:23:31,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906556618] [2022-02-23 17:23:31,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:31,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 17:23:31,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 17:23:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 17:23:31,704 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 17:23:31,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:31,715 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-02-23 17:23:31,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 17:23:31,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-23 17:23:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:31,717 INFO L225 Difference]: With dead ends: 35 [2022-02-23 17:23:31,717 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 17:23:31,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 17:23:31,718 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:31,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:23:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 17:23:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 17:23:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 17:23:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-23 17:23:31,725 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2022-02-23 17:23:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:31,725 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-23 17:23:31,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 17:23:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-23 17:23:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 17:23:31,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:31,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:31,755 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 17:23:31,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:31,939 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2022-02-23 17:23:31,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:31,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270710645] [2022-02-23 17:23:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:31,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:31,951 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:31,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031235427] [2022-02-23 17:23:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:31,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:31,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:31,953 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 17:23:31,966 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 17:23:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:32,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 17:23:32,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 17:23:32,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:23:32,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:32,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270710645] [2022-02-23 17:23:32,100 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:32,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031235427] [2022-02-23 17:23:32,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031235427] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:32,101 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:32,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:23:32,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841885952] [2022-02-23 17:23:32,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:32,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:23:32,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:23:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:23:32,102 INFO L87 Difference]: Start difference. First operand 35 states and 44 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 17:23:32,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:32,161 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-02-23 17:23:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:23:32,161 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 17:23:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:32,162 INFO L225 Difference]: With dead ends: 43 [2022-02-23 17:23:32,162 INFO L226 Difference]: Without dead ends: 43 [2022-02-23 17:23:32,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 17:23:32,164 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:32,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:23:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-23 17:23:32,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-02-23 17:23:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 17:23:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-02-23 17:23:32,172 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2022-02-23 17:23:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:32,172 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-02-23 17:23:32,173 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 17:23:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-02-23 17:23:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 17:23:32,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:32,173 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:32,198 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 17:23:32,396 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,SelfDestructingSolverStorable2 [2022-02-23 17:23:32,396 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2022-02-23 17:23:32,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:32,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758659219] [2022-02-23 17:23:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:32,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:32,419 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:32,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071103544] [2022-02-23 17:23:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:32,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:32,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:32,421 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 17:23:32,430 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 17:23:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 17:23:32,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 17:23:32,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:23:32,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:32,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758659219] [2022-02-23 17:23:32,558 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:32,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071103544] [2022-02-23 17:23:32,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071103544] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:32,558 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:32,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:23:32,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523277632] [2022-02-23 17:23:32,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:32,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:23:32,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:23:32,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:23:32,560 INFO L87 Difference]: Start difference. First operand 40 states and 49 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:23:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:32,606 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2022-02-23 17:23:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:23:32,607 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 17:23:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:32,608 INFO L225 Difference]: With dead ends: 56 [2022-02-23 17:23:32,608 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 17:23:32,608 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 17:23:32,609 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:32,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:23:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 17:23:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-02-23 17:23:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 17:23:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-02-23 17:23:32,618 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2022-02-23 17:23:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:32,618 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-02-23 17:23:32,619 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 17:23:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-02-23 17:23:32,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 17:23:32,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:32,620 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:32,645 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 17:23:32,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:32,843 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2022-02-23 17:23:32,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:32,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101126794] [2022-02-23 17:23:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:32,855 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:32,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211149990] [2022-02-23 17:23:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:32,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:32,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:32,857 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 17:23:32,870 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 17:23:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:32,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 17:23:32,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:23:32,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:23:32,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:32,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101126794] [2022-02-23 17:23:32,983 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:32,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211149990] [2022-02-23 17:23:32,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211149990] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:32,984 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:32,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:23:32,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739865191] [2022-02-23 17:23:32,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:32,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:23:32,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:23:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:23:32,985 INFO L87 Difference]: Start difference. First operand 54 states and 69 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 17:23:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:33,030 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2022-02-23 17:23:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:23:33,031 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-02-23 17:23:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:33,033 INFO L225 Difference]: With dead ends: 81 [2022-02-23 17:23:33,033 INFO L226 Difference]: Without dead ends: 81 [2022-02-23 17:23:33,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 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 17:23:33,034 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:33,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 160 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:23:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-23 17:23:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-02-23 17:23:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 17:23:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-02-23 17:23:33,044 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2022-02-23 17:23:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:33,044 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-02-23 17:23:33,045 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 17:23:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-02-23 17:23:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 17:23:33,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:33,046 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:33,073 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 17:23:33,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:33,260 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2022-02-23 17:23:33,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:33,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391279231] [2022-02-23 17:23:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:33,273 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:33,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395869132] [2022-02-23 17:23:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:33,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:33,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:33,288 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 17:23:33,297 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 17:23:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 17:23:33,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:23:33,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:23:33,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:33,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391279231] [2022-02-23 17:23:33,432 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:33,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395869132] [2022-02-23 17:23:33,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395869132] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:33,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:33,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 17:23:33,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191731811] [2022-02-23 17:23:33,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:33,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 17:23:33,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 17:23:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:23:33,434 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 17:23:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:33,463 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2022-02-23 17:23:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 17:23:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-02-23 17:23:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:33,469 INFO L225 Difference]: With dead ends: 78 [2022-02-23 17:23:33,469 INFO L226 Difference]: Without dead ends: 78 [2022-02-23 17:23:33,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 17:23:33,471 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:33,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:23:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-23 17:23:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-02-23 17:23:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 17:23:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2022-02-23 17:23:33,481 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2022-02-23 17:23:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:33,482 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2022-02-23 17:23:33,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 17:23:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2022-02-23 17:23:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 17:23:33,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:33,483 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:33,503 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 17:23:33,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:33,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:33,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2022-02-23 17:23:33,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:33,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218480618] [2022-02-23 17:23:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:33,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:33,704 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:33,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370478328] [2022-02-23 17:23:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:33,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:33,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:33,706 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 17:23:33,737 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 17:23:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 17:23:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 17:23:33,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:23:33,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:33,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218480618] [2022-02-23 17:23:33,887 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:33,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370478328] [2022-02-23 17:23:33,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370478328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:23:33,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:23:33,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 17:23:33,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483276673] [2022-02-23 17:23:33,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:23:33,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 17:23:33,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 17:23:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:23:33,889 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 17:23:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:33,969 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2022-02-23 17:23:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 17:23:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-02-23 17:23:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:33,971 INFO L225 Difference]: With dead ends: 82 [2022-02-23 17:23:33,971 INFO L226 Difference]: Without dead ends: 82 [2022-02-23 17:23:33,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:23:33,973 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:33,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 203 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-23 17:23:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-23 17:23:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 17:23:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-02-23 17:23:33,985 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2022-02-23 17:23:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:33,985 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-02-23 17:23:33,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 17:23:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-02-23 17:23:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 17:23:33,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:33,987 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:34,007 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 17:23:34,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:34,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2022-02-23 17:23:34,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:34,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340729014] [2022-02-23 17:23:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:34,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:34,210 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:34,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457904303] [2022-02-23 17:23:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:34,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:34,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:34,211 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 17:23:34,231 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 17:23:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:34,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 17:23:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:23:34,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:23:34,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:34,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340729014] [2022-02-23 17:23:34,586 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:34,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457904303] [2022-02-23 17:23:34,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457904303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:23:34,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:23:34,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-23 17:23:34,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298634741] [2022-02-23 17:23:34,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:34,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 17:23:34,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:34,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 17:23:34,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-23 17:23:34,588 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-23 17:23:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:34,680 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2022-02-23 17:23:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 17:23:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2022-02-23 17:23:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:34,682 INFO L225 Difference]: With dead ends: 86 [2022-02-23 17:23:34,682 INFO L226 Difference]: Without dead ends: 86 [2022-02-23 17:23:34,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-23 17:23:34,683 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:34,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 137 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-23 17:23:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-02-23 17:23:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 17:23:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-02-23 17:23:34,690 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2022-02-23 17:23:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:34,691 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-02-23 17:23:34,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-23 17:23:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-02-23 17:23:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 17:23:34,692 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:34,692 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:34,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 17:23:34,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:34,900 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2022-02-23 17:23:34,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:34,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423659657] [2022-02-23 17:23:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:34,910 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:34,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370494601] [2022-02-23 17:23:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:34,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:34,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:34,912 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 17:23:34,931 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 17:23:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:34,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 17:23:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 17:23:35,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 17:23:35,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:35,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423659657] [2022-02-23 17:23:35,189 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:35,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370494601] [2022-02-23 17:23:35,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370494601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:23:35,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:23:35,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 17:23:35,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79212346] [2022-02-23 17:23:35,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:35,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 17:23:35,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:35,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 17:23:35,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 17:23:35,194 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 17:23:35,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:35,351 INFO L93 Difference]: Finished difference Result 250 states and 299 transitions. [2022-02-23 17:23:35,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 17:23:35,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-02-23 17:23:35,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:35,354 INFO L225 Difference]: With dead ends: 250 [2022-02-23 17:23:35,354 INFO L226 Difference]: Without dead ends: 250 [2022-02-23 17:23:35,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-23 17:23:35,355 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 90 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:35,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 241 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-23 17:23:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 239. [2022-02-23 17:23:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 161 states have internal predecessors, (182), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2022-02-23 17:23:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 291 transitions. [2022-02-23 17:23:35,369 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 291 transitions. Word has length 50 [2022-02-23 17:23:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:35,369 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 291 transitions. [2022-02-23 17:23:35,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 17:23:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 291 transitions. [2022-02-23 17:23:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 17:23:35,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:35,370 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:35,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-23 17:23:35,586 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,SelfDestructingSolverStorable8 [2022-02-23 17:23:35,586 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:35,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:35,587 INFO L85 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2022-02-23 17:23:35,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:35,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617369291] [2022-02-23 17:23:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:35,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:35,596 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:35,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32006571] [2022-02-23 17:23:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:35,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:35,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:35,597 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 17:23:35,602 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 17:23:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:35,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-23 17:23:35,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 17:23:35,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:36,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:36,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617369291] [2022-02-23 17:23:36,166 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:36,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32006571] [2022-02-23 17:23:36,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32006571] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 17:23:36,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 17:23:36,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-23 17:23:36,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782975212] [2022-02-23 17:23:36,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:36,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 17:23:36,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 17:23:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-23 17:23:36,168 INFO L87 Difference]: Start difference. First operand 239 states and 291 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-23 17:23:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:36,330 INFO L93 Difference]: Finished difference Result 218 states and 257 transitions. [2022-02-23 17:23:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 17:23:36,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-02-23 17:23:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:36,333 INFO L225 Difference]: With dead ends: 218 [2022-02-23 17:23:36,333 INFO L226 Difference]: Without dead ends: 203 [2022-02-23 17:23:36,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-02-23 17:23:36,334 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:36,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 201 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-02-23 17:23:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-02-23 17:23:36,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 136 states have internal predecessors, (152), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 17:23:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-02-23 17:23:36,344 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 55 [2022-02-23 17:23:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:36,344 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-02-23 17:23:36,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-23 17:23:36,344 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-02-23 17:23:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-23 17:23:36,345 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:36,345 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:36,373 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 17:23:36,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 17:23:36,567 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash 136506131, now seen corresponding path program 1 times [2022-02-23 17:23:36,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:36,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550999946] [2022-02-23 17:23:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:36,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:36,577 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:36,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776123602] [2022-02-23 17:23:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:36,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:36,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:36,579 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 17:23:36,580 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 17:23:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 17:23:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-23 17:23:36,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 17:23:36,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:36,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550999946] [2022-02-23 17:23:36,897 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:36,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776123602] [2022-02-23 17:23:36,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776123602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:23:36,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:23:36,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 17:23:36,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076913609] [2022-02-23 17:23:36,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:36,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 17:23:36,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 17:23:36,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 17:23:36,899 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-02-23 17:23:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:37,061 INFO L93 Difference]: Finished difference Result 214 states and 246 transitions. [2022-02-23 17:23:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 17:23:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 63 [2022-02-23 17:23:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:37,063 INFO L225 Difference]: With dead ends: 214 [2022-02-23 17:23:37,063 INFO L226 Difference]: Without dead ends: 214 [2022-02-23 17:23:37,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-23 17:23:37,064 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 98 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:37,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 283 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:23:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-23 17:23:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2022-02-23 17:23:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 17:23:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-02-23 17:23:37,072 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 63 [2022-02-23 17:23:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:37,072 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-02-23 17:23:37,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-02-23 17:23:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-02-23 17:23:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-23 17:23:37,074 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:23:37,074 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:37,100 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 17:23:37,293 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,SelfDestructingSolverStorable10 [2022-02-23 17:23:37,293 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:23:37,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:23:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2022-02-23 17:23:37,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:23:37,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555595243] [2022-02-23 17:23:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:37,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:23:37,303 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:23:37,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998780253] [2022-02-23 17:23:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:23:37,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:23:37,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:23:37,306 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 17:23:37,307 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 17:23:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:23:37,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-23 17:23:37,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:23:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 17:23:37,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:23:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-23 17:23:37,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:23:37,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555595243] [2022-02-23 17:23:37,893 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:23:37,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998780253] [2022-02-23 17:23:37,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998780253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:23:37,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:23:37,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-02-23 17:23:37,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032282018] [2022-02-23 17:23:37,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:23:37,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 17:23:37,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:23:37,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 17:23:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:23:37,895 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 17:23:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:23:38,240 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2022-02-23 17:23:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 17:23:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 79 [2022-02-23 17:23:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:23:38,241 INFO L225 Difference]: With dead ends: 234 [2022-02-23 17:23:38,241 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 17:23:38,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-23 17:23:38,241 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 75 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 17:23:38,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 256 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 17:23:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 17:23:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 17:23:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 17:23:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 17:23:38,242 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-02-23 17:23:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:23:38,243 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 17:23:38,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 17:23:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 17:23:38,243 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 17:23:38,245 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 17:23:38,262 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 17:23:38,446 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,SelfDestructingSolverStorable11 [2022-02-23 17:23:38,448 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:23:38,449 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 17:23:38,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:23:38 BasicIcfg [2022-02-23 17:23:38,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 17:23:38,452 INFO L158 Benchmark]: Toolchain (without parser) took 8003.81ms. Allocated memory was 173.0MB in the beginning and 234.9MB in the end (delta: 61.9MB). Free memory was 118.9MB in the beginning and 138.1MB in the end (delta: -19.2MB). Peak memory consumption was 42.5MB. Max. memory is 8.0GB. [2022-02-23 17:23:38,452 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 173.0MB. Free memory is still 135.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 17:23:38,452 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.82ms. Allocated memory is still 173.0MB. Free memory was 118.7MB in the beginning and 144.3MB in the end (delta: -25.6MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-02-23 17:23:38,453 INFO L158 Benchmark]: Boogie Preprocessor took 22.72ms. Allocated memory is still 173.0MB. Free memory was 144.3MB in the beginning and 142.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 17:23:38,453 INFO L158 Benchmark]: RCFGBuilder took 271.94ms. Allocated memory is still 173.0MB. Free memory was 142.8MB in the beginning and 131.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-23 17:23:38,453 INFO L158 Benchmark]: IcfgTransformer took 17.21ms. Allocated memory is still 173.0MB. Free memory was 131.8MB in the beginning and 130.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 17:23:38,453 INFO L158 Benchmark]: TraceAbstraction took 7464.98ms. Allocated memory was 173.0MB in the beginning and 234.9MB in the end (delta: 61.9MB). Free memory was 130.2MB in the beginning and 138.1MB in the end (delta: -8.0MB). Peak memory consumption was 54.7MB. Max. memory is 8.0GB. [2022-02-23 17:23:38,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 173.0MB. Free memory is still 135.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 222.82ms. Allocated memory is still 173.0MB. Free memory was 118.7MB in the beginning and 144.3MB in the end (delta: -25.6MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.72ms. Allocated memory is still 173.0MB. Free memory was 144.3MB in the beginning and 142.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 271.94ms. Allocated memory is still 173.0MB. Free memory was 142.8MB in the beginning and 131.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.21ms. Allocated memory is still 173.0MB. Free memory was 131.8MB in the beginning and 130.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 7464.98ms. Allocated memory was 173.0MB in the beginning and 234.9MB in the end (delta: 61.9MB). Free memory was 130.2MB in the beginning and 138.1MB in the end (delta: -8.0MB). Peak memory consumption was 54.7MB. 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 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.4s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 409 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 385 mSDsluCounter, 2070 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1542 mSDsCounter, 232 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 966 IncrementalHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 232 mSolverCounterUnsat, 528 mSDtfsCounter, 966 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 653 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=9, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 28 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 476 NumberOfCodeBlocks, 476 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 699 ConstructedInterpolants, 0 QuantifiedInterpolants, 1996 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1473 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 861/960 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 17:23:38,487 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...