/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 00:28:28,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 00:28:28,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 00:28:28,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 00:28:28,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 00:28:28,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 00:28:28,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 00:28:28,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 00:28:28,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 00:28:28,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 00:28:28,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 00:28:28,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 00:28:28,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 00:28:28,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 00:28:28,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 00:28:28,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 00:28:28,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 00:28:28,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 00:28:28,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 00:28:28,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 00:28:28,844 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 00:28:28,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 00:28:28,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 00:28:28,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 00:28:28,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 00:28:28,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 00:28:28,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 00:28:28,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 00:28:28,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 00:28:28,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-19 00:28:28,882 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 00:28:28,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 00:28:28,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 00:28:28,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 00:28:28,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 00:28:28,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 00:28:28,885 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 00:28:28,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 00:28:28,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 00:28:28,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 00:28:28,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 00:28:28,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 00:28:28,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 00:28:28,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 00:28:28,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 00:28:28,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 00:28:28,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 00:28:28,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 00:28:28,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 00:28:28,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 00:28:28,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 00:28:28,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 00:28:28,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 00:28:28,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 00:28:28,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 00:28:28,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 00:28:28,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-19 00:28:28,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-19 00:28:28,888 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-19 00:28:28,888 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 00:28:29,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 00:28:29,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 00:28:29,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 00:28:29,087 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 00:28:29,087 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 00:28:29,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound100.c [2022-03-19 00:28:29,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c36e06d4/295df0b96c624dd39e7f6485a91fdcd0/FLAGa3d3b49fe [2022-03-19 00:28:29,471 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 00:28:29,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound100.c [2022-03-19 00:28:29,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c36e06d4/295df0b96c624dd39e7f6485a91fdcd0/FLAGa3d3b49fe [2022-03-19 00:28:29,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c36e06d4/295df0b96c624dd39e7f6485a91fdcd0 [2022-03-19 00:28:29,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 00:28:29,487 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-19 00:28:29,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 00:28:29,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 00:28:29,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 00:28:29,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb2fc5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29, skipping insertion in model container [2022-03-19 00:28:29,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 00:28:29,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 00:28:29,673 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2022-03-19 00:28:29,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 00:28:29,690 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 00:28:29,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2022-03-19 00:28:29,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 00:28:29,721 INFO L208 MainTranslator]: Completed translation [2022-03-19 00:28:29,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29 WrapperNode [2022-03-19 00:28:29,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 00:28:29,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 00:28:29,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 00:28:29,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 00:28:29,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 00:28:29,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 00:28:29,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 00:28:29,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 00:28:29,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 00:28:29,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:29,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 00:28:29,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 00:28:29,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 00:28:29,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 00:28:29,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 00:28:29,804 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 00:28:29,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 00:28:29,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 00:28:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 00:28:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 00:28:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 00:28:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 00:28:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 00:28:29,848 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 00:28:29,849 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 00:28:29,959 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 00:28:29,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 00:28:29,964 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 00:28:29,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:28:29 BoogieIcfgContainer [2022-03-19 00:28:29,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 00:28:29,966 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-19 00:28:29,966 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-19 00:28:29,967 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-19 00:28:29,969 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:28:29" (1/1) ... [2022-03-19 00:28:29,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 12:28:29 BasicIcfg [2022-03-19 00:28:29,983 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-19 00:28:29,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 00:28:29,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 00:28:29,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 00:28:29,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 12:28:29" (1/4) ... [2022-03-19 00:28:29,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5b73e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:28:29, skipping insertion in model container [2022-03-19 00:28:29,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:28:29" (2/4) ... [2022-03-19 00:28:29,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5b73e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:28:29, skipping insertion in model container [2022-03-19 00:28:29,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:28:29" (3/4) ... [2022-03-19 00:28:29,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5b73e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 12:28:29, skipping insertion in model container [2022-03-19 00:28:29,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 12:28:29" (4/4) ... [2022-03-19 00:28:29,989 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound100.cqvasr [2022-03-19 00:28:29,992 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 00:28:29,992 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 00:28:30,076 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 00:28:30,095 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 00:28:30,096 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 00:28:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 00:28:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 00:28:30,118 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:30,119 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:30,122 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-03-19 00:28:30,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:30,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508732757] [2022-03-19 00:28:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:30,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:30,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:28:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:28:30,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:30,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508732757] [2022-03-19 00:28:30,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508732757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:28:30,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:28:30,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 00:28:30,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171058116] [2022-03-19 00:28:30,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:28:30,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 00:28:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:30,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 00:28:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 00:28:30,344 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 00:28:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:30,440 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-03-19 00:28:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 00:28:30,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 00:28:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:30,450 INFO L225 Difference]: With dead ends: 57 [2022-03-19 00:28:30,450 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 00:28:30,454 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 00:28:30,460 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:30,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:28:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 00:28:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-19 00:28:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 00:28:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-19 00:28:30,487 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-19 00:28:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:30,488 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-19 00:28:30,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 00:28:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-19 00:28:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 00:28:30,489 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:30,489 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:30,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 00:28:30,489 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:30,490 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-03-19 00:28:30,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:30,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302874440] [2022-03-19 00:28:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:30,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:30,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:28:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:28:30,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:30,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302874440] [2022-03-19 00:28:30,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302874440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:28:30,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:28:30,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 00:28:30,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627134689] [2022-03-19 00:28:30,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:28:30,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:28:30,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:30,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:28:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:28:30,554 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 00:28:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:30,654 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-03-19 00:28:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 00:28:30,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 00:28:30,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:30,655 INFO L225 Difference]: With dead ends: 41 [2022-03-19 00:28:30,655 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 00:28:30,656 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:28:30,657 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:30,657 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:28:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 00:28:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-19 00:28:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 00:28:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-19 00:28:30,664 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-19 00:28:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:30,664 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-19 00:28:30,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 00:28:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-19 00:28:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 00:28:30,665 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:30,665 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:30,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 00:28:30,665 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:30,666 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-03-19 00:28:30,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:30,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914977364] [2022-03-19 00:28:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:30,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:30,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:28:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:28:30,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:30,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914977364] [2022-03-19 00:28:30,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914977364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:28:30,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:28:30,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 00:28:30,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197188385] [2022-03-19 00:28:30,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:28:30,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:28:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:30,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:28:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:28:30,710 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 00:28:30,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:30,766 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-03-19 00:28:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 00:28:30,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 00:28:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:30,768 INFO L225 Difference]: With dead ends: 46 [2022-03-19 00:28:30,768 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 00:28:30,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:28:30,769 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:30,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:28:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 00:28:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 00:28:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 00:28:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-19 00:28:30,775 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-19 00:28:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:30,776 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-19 00:28:30,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 00:28:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-19 00:28:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 00:28:30,776 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:30,776 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:30,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 00:28:30,777 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-03-19 00:28:30,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:30,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424205990] [2022-03-19 00:28:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:30,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:30,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:28:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:30,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-19 00:28:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:28:30,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:30,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424205990] [2022-03-19 00:28:30,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424205990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:28:30,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:28:30,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 00:28:30,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825596487] [2022-03-19 00:28:30,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:28:30,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:28:30,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:30,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:28:30,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:28:30,842 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 00:28:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:30,944 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-19 00:28:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 00:28:30,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-19 00:28:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:30,945 INFO L225 Difference]: With dead ends: 46 [2022-03-19 00:28:30,945 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 00:28:30,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:28:30,947 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:30,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:28:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 00:28:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-19 00:28:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 00:28:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-19 00:28:30,953 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-19 00:28:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:30,954 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-19 00:28:30,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 00:28:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-19 00:28:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 00:28:30,954 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:30,955 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:30,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 00:28:30,955 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:30,955 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-03-19 00:28:30,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:30,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778040122] [2022-03-19 00:28:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:30,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:30,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:30,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403634886] [2022-03-19 00:28:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:30,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:30,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:30,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:30,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 00:28:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 00:28:31,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:28:31,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:28:31,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:31,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778040122] [2022-03-19 00:28:31,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:31,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403634886] [2022-03-19 00:28:31,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403634886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:28:31,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:28:31,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 00:28:31,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598888171] [2022-03-19 00:28:31,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:28:31,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:28:31,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:28:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:28:31,230 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:28:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:31,264 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-03-19 00:28:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:28:31,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-19 00:28:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:31,265 INFO L225 Difference]: With dead ends: 65 [2022-03-19 00:28:31,265 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 00:28:31,266 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:28:31,266 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:31,267 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:28:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 00:28:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-19 00:28:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 00:28:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-19 00:28:31,273 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-19 00:28:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:31,273 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-19 00:28:31,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:28:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-19 00:28:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 00:28:31,274 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:31,274 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:31,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 00:28:31,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:31,492 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-03-19 00:28:31,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:31,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121905264] [2022-03-19 00:28:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:31,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:31,501 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:31,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216732180] [2022-03-19 00:28:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:31,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:31,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:31,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:31,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 00:28:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:31,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:28:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:28:31,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:28:31,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:31,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121905264] [2022-03-19 00:28:31,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:31,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216732180] [2022-03-19 00:28:31,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216732180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:28:31,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:28:31,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 00:28:31,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593175823] [2022-03-19 00:28:31,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:28:31,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:28:31,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:28:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:28:31,693 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 00:28:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:31,732 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-19 00:28:31,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:28:31,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-19 00:28:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:31,735 INFO L225 Difference]: With dead ends: 70 [2022-03-19 00:28:31,735 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 00:28:31,735 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:28:31,736 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:31,736 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:28:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 00:28:31,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-19 00:28:31,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 00:28:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-19 00:28:31,744 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-19 00:28:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:31,744 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-19 00:28:31,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 00:28:31,745 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-19 00:28:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 00:28:31,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:31,746 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:31,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 00:28:31,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-19 00:28:31,960 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-03-19 00:28:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:31,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002543586] [2022-03-19 00:28:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:31,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:31,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139753269] [2022-03-19 00:28:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:31,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:31,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:31,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:31,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 00:28:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:32,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:28:32,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:28:32,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:28:32,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002543586] [2022-03-19 00:28:32,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139753269] [2022-03-19 00:28:32,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139753269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:28:32,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:28:32,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 00:28:32,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176335792] [2022-03-19 00:28:32,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:28:32,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:28:32,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:32,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:28:32,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:28:32,121 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 00:28:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:32,153 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-03-19 00:28:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:28:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-19 00:28:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:32,154 INFO L225 Difference]: With dead ends: 76 [2022-03-19 00:28:32,154 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 00:28:32,155 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:28:32,155 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:32,156 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:28:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 00:28:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-19 00:28:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 00:28:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-19 00:28:32,165 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-19 00:28:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:32,165 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-19 00:28:32,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 00:28:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-19 00:28:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 00:28:32,166 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:32,166 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:32,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 00:28:32,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:32,408 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:32,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-03-19 00:28:32,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:32,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494305226] [2022-03-19 00:28:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:32,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:32,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:32,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118025320] [2022-03-19 00:28:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:32,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:32,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:32,436 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:32,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 00:28:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:32,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:28:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 00:28:32,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:28:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 00:28:32,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:32,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494305226] [2022-03-19 00:28:32,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:32,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118025320] [2022-03-19 00:28:32,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118025320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:28:32,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:28:32,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 00:28:32,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389564773] [2022-03-19 00:28:32,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:28:32,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 00:28:32,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 00:28:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 00:28:32,653 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 00:28:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:32,724 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2022-03-19 00:28:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 00:28:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-03-19 00:28:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:32,726 INFO L225 Difference]: With dead ends: 144 [2022-03-19 00:28:32,726 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 00:28:32,727 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-19 00:28:32,728 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:32,728 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 207 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:28:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 00:28:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-03-19 00:28:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 00:28:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-03-19 00:28:32,739 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-03-19 00:28:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:32,739 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-03-19 00:28:32,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 00:28:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-03-19 00:28:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 00:28:32,740 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:32,740 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:32,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 00:28:32,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:32,946 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-03-19 00:28:32,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:32,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386726779] [2022-03-19 00:28:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:32,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:32,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:32,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987803223] [2022-03-19 00:28:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:32,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:32,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:32,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:32,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 00:28:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:33,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 00:28:33,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 00:28:33,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:28:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 00:28:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:33,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386726779] [2022-03-19 00:28:33,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:33,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987803223] [2022-03-19 00:28:33,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987803223] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 00:28:33,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 00:28:33,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 00:28:33,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199416870] [2022-03-19 00:28:33,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:28:33,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:28:33,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:28:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 00:28:33,273 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 00:28:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:33,314 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2022-03-19 00:28:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:28:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-19 00:28:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:33,318 INFO L225 Difference]: With dead ends: 129 [2022-03-19 00:28:33,318 INFO L226 Difference]: Without dead ends: 125 [2022-03-19 00:28:33,319 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 00:28:33,320 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:33,321 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:28:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-19 00:28:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-03-19 00:28:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 00:28:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-03-19 00:28:33,343 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-03-19 00:28:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:33,343 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-03-19 00:28:33,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 00:28:33,344 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-03-19 00:28:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 00:28:33,345 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:33,345 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:33,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 00:28:33,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:33,546 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-03-19 00:28:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:33,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113817150] [2022-03-19 00:28:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:33,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:33,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903297666] [2022-03-19 00:28:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:33,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:33,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:33,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:33,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 00:28:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:33,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 00:28:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-19 00:28:33,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:28:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 00:28:33,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:33,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113817150] [2022-03-19 00:28:33,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:33,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903297666] [2022-03-19 00:28:33,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903297666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:28:33,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:28:33,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 00:28:33,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886927136] [2022-03-19 00:28:33,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:28:33,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 00:28:33,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 00:28:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:28:33,823 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 00:28:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:33,942 INFO L93 Difference]: Finished difference Result 245 states and 298 transitions. [2022-03-19 00:28:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 00:28:33,943 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-03-19 00:28:33,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:33,945 INFO L225 Difference]: With dead ends: 245 [2022-03-19 00:28:33,945 INFO L226 Difference]: Without dead ends: 224 [2022-03-19 00:28:33,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-19 00:28:33,946 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 80 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:33,946 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 302 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:28:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-19 00:28:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-03-19 00:28:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 51 states have call successors, (51), 28 states have call predecessors, (51), 26 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-19 00:28:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-03-19 00:28:33,981 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 53 [2022-03-19 00:28:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:33,981 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-03-19 00:28:33,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 00:28:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-03-19 00:28:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 00:28:33,983 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:33,983 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:34,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 00:28:34,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:34,191 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:34,192 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-03-19 00:28:34,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:34,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741466284] [2022-03-19 00:28:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:34,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:34,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:34,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334862542] [2022-03-19 00:28:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:34,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:34,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:34,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:34,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 00:28:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:34,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 00:28:34,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 00:28:34,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:28:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 00:28:35,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741466284] [2022-03-19 00:28:35,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334862542] [2022-03-19 00:28:35,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334862542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:28:35,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:28:35,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-19 00:28:35,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844196222] [2022-03-19 00:28:35,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:28:35,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 00:28:35,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:35,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 00:28:35,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:28:35,332 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 00:28:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:39,904 INFO L93 Difference]: Finished difference Result 371 states and 479 transitions. [2022-03-19 00:28:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 00:28:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-03-19 00:28:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:39,907 INFO L225 Difference]: With dead ends: 371 [2022-03-19 00:28:39,907 INFO L226 Difference]: Without dead ends: 303 [2022-03-19 00:28:39,908 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-19 00:28:39,908 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:39,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 294 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 00:28:39,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-19 00:28:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-03-19 00:28:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 191 states have internal predecessors, (228), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-19 00:28:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 341 transitions. [2022-03-19 00:28:39,968 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 341 transitions. Word has length 62 [2022-03-19 00:28:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:39,968 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 341 transitions. [2022-03-19 00:28:39,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 00:28:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 341 transitions. [2022-03-19 00:28:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 00:28:39,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:39,970 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:39,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 00:28:40,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:40,171 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-03-19 00:28:40,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:40,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918928573] [2022-03-19 00:28:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:40,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:40,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:40,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786587998] [2022-03-19 00:28:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:40,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:40,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:40,182 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:40,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 00:28:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:40,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 00:28:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-03-19 00:28:40,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:28:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-03-19 00:28:40,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:40,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918928573] [2022-03-19 00:28:40,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:40,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786587998] [2022-03-19 00:28:40,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786587998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:28:40,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:28:40,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-19 00:28:40,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146561933] [2022-03-19 00:28:40,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:28:40,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 00:28:40,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:40,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 00:28:40,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-19 00:28:40,896 INFO L87 Difference]: Start difference. First operand 274 states and 341 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 00:28:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:41,261 INFO L93 Difference]: Finished difference Result 335 states and 416 transitions. [2022-03-19 00:28:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 00:28:41,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-03-19 00:28:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:41,263 INFO L225 Difference]: With dead ends: 335 [2022-03-19 00:28:41,263 INFO L226 Difference]: Without dead ends: 239 [2022-03-19 00:28:41,263 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-03-19 00:28:41,264 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:41,264 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 264 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 00:28:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-19 00:28:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-03-19 00:28:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 154 states have internal predecessors, (179), 45 states have call successors, (45), 29 states have call predecessors, (45), 27 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-19 00:28:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2022-03-19 00:28:41,282 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 73 [2022-03-19 00:28:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:41,282 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2022-03-19 00:28:41,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-03-19 00:28:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2022-03-19 00:28:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 00:28:41,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:41,283 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:41,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 00:28:41,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 00:28:41,511 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-03-19 00:28:41,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:41,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74793214] [2022-03-19 00:28:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:41,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:41,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:41,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638789706] [2022-03-19 00:28:41,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:41,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:41,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:41,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:41,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 00:28:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:28:41,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 00:28:41,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-19 00:28:41,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:28:41,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:41,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74793214] [2022-03-19 00:28:41,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:41,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638789706] [2022-03-19 00:28:41,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638789706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:28:41,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:28:41,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 00:28:41,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360029464] [2022-03-19 00:28:41,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:28:41,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:28:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:41,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:28:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:28:41,757 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 00:28:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:28:41,802 INFO L93 Difference]: Finished difference Result 242 states and 289 transitions. [2022-03-19 00:28:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:28:41,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-03-19 00:28:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:28:41,804 INFO L225 Difference]: With dead ends: 242 [2022-03-19 00:28:41,804 INFO L226 Difference]: Without dead ends: 222 [2022-03-19 00:28:41,805 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:28:41,805 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 24 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:28:41,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 121 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:28:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-19 00:28:41,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2022-03-19 00:28:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-19 00:28:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-03-19 00:28:41,825 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 82 [2022-03-19 00:28:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:28:41,826 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-03-19 00:28:41,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 00:28:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-03-19 00:28:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-19 00:28:41,828 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:28:41,828 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:28:41,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 00:28:42,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 00:28:42,045 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:28:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:28:42,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-03-19 00:28:42,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:28:42,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800207525] [2022-03-19 00:28:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:28:42,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:28:42,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:28:42,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224275564] [2022-03-19 00:28:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 00:28:42,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:28:42,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:28:42,061 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:28:42,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 00:28:42,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 00:28:42,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:28:42,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 00:28:42,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:28:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 00:28:42,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:28:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 00:28:57,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:28:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800207525] [2022-03-19 00:28:57,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:28:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224275564] [2022-03-19 00:28:57,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224275564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:28:57,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:28:57,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-19 00:28:57,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973790781] [2022-03-19 00:28:57,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:28:57,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 00:28:57,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:28:57,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 00:28:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-19 00:28:57,908 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-19 00:29:16,040 WARN L232 SmtUtils]: Spent 17.89s on a formula simplification. DAG size of input: 192 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 00:29:18,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:29:25,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:29:28,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:29:31,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:29:33,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:29:39,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:29:41,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:29:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:29:41,638 INFO L93 Difference]: Finished difference Result 332 states and 434 transitions. [2022-03-19 00:29:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 00:29:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-03-19 00:29:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:29:41,640 INFO L225 Difference]: With dead ends: 332 [2022-03-19 00:29:41,640 INFO L226 Difference]: Without dead ends: 275 [2022-03-19 00:29:41,641 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-03-19 00:29:41,641 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 179 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2022-03-19 00:29:41,641 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 660 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 511 Invalid, 5 Unknown, 0 Unchecked, 17.9s Time] [2022-03-19 00:29:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-19 00:29:41,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-03-19 00:29:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 177 states have internal predecessors, (211), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-19 00:29:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-03-19 00:29:41,665 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 94 [2022-03-19 00:29:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:29:41,666 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-03-19 00:29:41,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-19 00:29:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-03-19 00:29:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 00:29:41,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:29:41,667 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:29:41,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 00:29:41,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 00:29:41,883 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:29:41,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:29:41,884 INFO L85 PathProgramCache]: Analyzing trace with hash -105290329, now seen corresponding path program 1 times [2022-03-19 00:29:41,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:29:41,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735183320] [2022-03-19 00:29:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:29:41,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:29:41,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:29:41,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010949233] [2022-03-19 00:29:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:29:41,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:29:41,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:29:41,909 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:29:41,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 00:29:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:29:41,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 00:29:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:29:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-19 00:29:42,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:29:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-03-19 00:29:42,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:29:42,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735183320] [2022-03-19 00:29:42,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:29:42,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010949233] [2022-03-19 00:29:42,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010949233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:29:42,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:29:42,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 00:29:42,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374085546] [2022-03-19 00:29:42,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:29:42,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 00:29:42,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:29:42,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 00:29:42,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 00:29:42,401 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-19 00:29:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:29:42,724 INFO L93 Difference]: Finished difference Result 746 states and 1016 transitions. [2022-03-19 00:29:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 00:29:42,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 100 [2022-03-19 00:29:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:29:42,729 INFO L225 Difference]: With dead ends: 746 [2022-03-19 00:29:42,729 INFO L226 Difference]: Without dead ends: 659 [2022-03-19 00:29:42,731 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-19 00:29:42,732 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 177 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 00:29:42,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 296 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 00:29:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-19 00:29:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-03-19 00:29:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 361 states have (on average 1.2825484764542936) internal successors, (463), 378 states have internal predecessors, (463), 136 states have call successors, (136), 56 states have call predecessors, (136), 54 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-19 00:29:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 730 transitions. [2022-03-19 00:29:42,808 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 730 transitions. Word has length 100 [2022-03-19 00:29:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:29:42,808 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 730 transitions. [2022-03-19 00:29:42,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-03-19 00:29:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 730 transitions. [2022-03-19 00:29:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-19 00:29:42,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:29:42,809 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:29:42,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 00:29:43,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 00:29:43,016 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:29:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:29:43,016 INFO L85 PathProgramCache]: Analyzing trace with hash 331614142, now seen corresponding path program 1 times [2022-03-19 00:29:43,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:29:43,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657645974] [2022-03-19 00:29:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:29:43,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:29:43,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:29:43,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750896134] [2022-03-19 00:29:43,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:29:43,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:29:43,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:29:43,026 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:29:43,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 00:29:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:29:43,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 00:29:43,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:29:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 00:29:43,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:29:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 00:29:43,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:29:43,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657645974] [2022-03-19 00:29:43,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:29:43,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750896134] [2022-03-19 00:29:43,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750896134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:29:43,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:29:43,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 00:29:43,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639946841] [2022-03-19 00:29:43,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:29:43,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 00:29:43,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:29:43,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 00:29:43,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 00:29:43,551 INFO L87 Difference]: Start difference. First operand 552 states and 730 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-19 00:29:44,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:29:44,028 INFO L93 Difference]: Finished difference Result 1159 states and 1613 transitions. [2022-03-19 00:29:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 00:29:44,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) Word has length 108 [2022-03-19 00:29:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:29:44,032 INFO L225 Difference]: With dead ends: 1159 [2022-03-19 00:29:44,032 INFO L226 Difference]: Without dead ends: 1122 [2022-03-19 00:29:44,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-03-19 00:29:44,033 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 356 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 00:29:44,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 500 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 00:29:44,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-03-19 00:29:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1097. [2022-03-19 00:29:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.2455418381344308) internal successors, (908), 758 states have internal predecessors, (908), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-03-19 00:29:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1457 transitions. [2022-03-19 00:29:44,114 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1457 transitions. Word has length 108 [2022-03-19 00:29:44,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:29:44,114 INFO L478 AbstractCegarLoop]: Abstraction has 1097 states and 1457 transitions. [2022-03-19 00:29:44,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 16 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-03-19 00:29:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1457 transitions. [2022-03-19 00:29:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 00:29:44,116 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:29:44,116 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:29:44,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 00:29:44,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 00:29:44,335 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:29:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:29:44,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1288142005, now seen corresponding path program 1 times [2022-03-19 00:29:44,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:29:44,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833097830] [2022-03-19 00:29:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:29:44,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:29:44,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:29:44,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900707154] [2022-03-19 00:29:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:29:44,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:29:44,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:29:44,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:29:44,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 00:29:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:29:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 00:29:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:29:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 00:29:44,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:29:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 00:29:45,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:29:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833097830] [2022-03-19 00:29:45,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:29:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900707154] [2022-03-19 00:29:45,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900707154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:29:45,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:29:45,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-19 00:29:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240441120] [2022-03-19 00:29:45,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:29:45,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 00:29:45,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:29:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 00:29:45,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:29:45,446 INFO L87 Difference]: Start difference. First operand 1097 states and 1457 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-19 00:29:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:29:45,860 INFO L93 Difference]: Finished difference Result 1103 states and 1463 transitions. [2022-03-19 00:29:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 00:29:45,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 110 [2022-03-19 00:29:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:29:45,864 INFO L225 Difference]: With dead ends: 1103 [2022-03-19 00:29:45,864 INFO L226 Difference]: Without dead ends: 1097 [2022-03-19 00:29:45,865 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-19 00:29:45,866 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 00:29:45,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 306 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 00:29:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-03-19 00:29:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2022-03-19 00:29:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 729 states have (on average 1.242798353909465) internal successors, (906), 758 states have internal predecessors, (906), 279 states have call successors, (279), 90 states have call predecessors, (279), 88 states have return successors, (270), 248 states have call predecessors, (270), 270 states have call successors, (270) [2022-03-19 00:29:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1455 transitions. [2022-03-19 00:29:45,954 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1455 transitions. Word has length 110 [2022-03-19 00:29:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:29:45,954 INFO L478 AbstractCegarLoop]: Abstraction has 1097 states and 1455 transitions. [2022-03-19 00:29:45,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-03-19 00:29:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1455 transitions. [2022-03-19 00:29:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 00:29:45,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:29:45,960 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:29:45,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 00:29:46,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 00:29:46,177 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:29:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:29:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash 848408867, now seen corresponding path program 2 times [2022-03-19 00:29:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:29:46,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915704715] [2022-03-19 00:29:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:29:46,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:29:46,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:29:46,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264776613] [2022-03-19 00:29:46,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 00:29:46,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:29:46,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:29:46,195 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:29:46,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 00:29:46,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 00:29:46,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:29:46,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 00:29:46,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:29:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-03-19 00:29:46,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:29:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 00:29:46,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:29:46,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915704715] [2022-03-19 00:29:46,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:29:46,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264776613] [2022-03-19 00:29:46,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264776613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:29:46,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:29:46,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-03-19 00:29:46,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327239148] [2022-03-19 00:29:46,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:29:46,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 00:29:46,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:29:46,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 00:29:46,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 00:29:46,690 INFO L87 Difference]: Start difference. First operand 1097 states and 1455 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-19 00:29:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:29:46,816 INFO L93 Difference]: Finished difference Result 1320 states and 1738 transitions. [2022-03-19 00:29:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:29:46,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 124 [2022-03-19 00:29:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:29:46,819 INFO L225 Difference]: With dead ends: 1320 [2022-03-19 00:29:46,820 INFO L226 Difference]: Without dead ends: 907 [2022-03-19 00:29:46,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 00:29:46,821 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 3 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:29:46,821 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 257 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:29:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-19 00:29:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 905. [2022-03-19 00:29:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 598 states have (on average 1.2040133779264215) internal successors, (720), 627 states have internal predecessors, (720), 221 states have call successors, (221), 87 states have call predecessors, (221), 85 states have return successors, (212), 190 states have call predecessors, (212), 212 states have call successors, (212) [2022-03-19 00:29:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1153 transitions. [2022-03-19 00:29:46,888 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1153 transitions. Word has length 124 [2022-03-19 00:29:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:29:46,889 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1153 transitions. [2022-03-19 00:29:46,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-03-19 00:29:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1153 transitions. [2022-03-19 00:29:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-19 00:29:46,891 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:29:46,891 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:29:46,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-19 00:29:47,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:29:47,127 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:29:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:29:47,127 INFO L85 PathProgramCache]: Analyzing trace with hash 722879610, now seen corresponding path program 3 times [2022-03-19 00:29:47,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:29:47,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011823054] [2022-03-19 00:29:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:29:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:29:47,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:29:47,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469088068] [2022-03-19 00:29:47,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 00:29:47,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:29:47,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:29:47,144 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:29:47,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 00:29:47,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 00:29:47,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:29:47,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 00:29:47,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:29:47,564 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 00:29:47,668 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 00:29:47,798 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 00:29:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-03-19 00:29:48,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:30:00,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:30:00,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011823054] [2022-03-19 00:30:00,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:30:00,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469088068] [2022-03-19 00:30:00,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469088068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 00:30:00,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 00:30:00,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-19 00:30:00,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413431125] [2022-03-19 00:30:00,621 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 00:30:00,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 00:30:00,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:30:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 00:30:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-19 00:30:00,623 INFO L87 Difference]: Start difference. First operand 905 states and 1153 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 00:30:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:30:00,743 INFO L93 Difference]: Finished difference Result 935 states and 1182 transitions. [2022-03-19 00:30:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 00:30:00,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 126 [2022-03-19 00:30:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:30:00,746 INFO L225 Difference]: With dead ends: 935 [2022-03-19 00:30:00,746 INFO L226 Difference]: Without dead ends: 921 [2022-03-19 00:30:00,747 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-19 00:30:00,747 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:30:00,747 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:30:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-03-19 00:30:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 695. [2022-03-19 00:30:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 468 states have (on average 1.1752136752136753) internal successors, (550), 470 states have internal predecessors, (550), 153 states have call successors, (153), 75 states have call predecessors, (153), 73 states have return successors, (150), 149 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-19 00:30:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 853 transitions. [2022-03-19 00:30:00,802 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 853 transitions. Word has length 126 [2022-03-19 00:30:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:30:00,802 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 853 transitions. [2022-03-19 00:30:00,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 00:30:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 853 transitions. [2022-03-19 00:30:00,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 00:30:00,803 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:30:00,803 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:30:00,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 00:30:01,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:30:01,021 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:30:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:30:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1722143882, now seen corresponding path program 3 times [2022-03-19 00:30:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:30:01,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951566539] [2022-03-19 00:30:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:30:01,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:30:01,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:30:01,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428546119] [2022-03-19 00:30:01,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 00:30:01,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:30:01,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:30:01,032 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:30:01,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 00:30:01,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 00:30:01,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:30:01,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 00:30:01,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:30:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-03-19 00:30:01,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:30:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-03-19 00:30:01,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:30:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951566539] [2022-03-19 00:30:01,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:30:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428546119] [2022-03-19 00:30:01,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428546119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:30:01,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:30:01,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-19 00:30:01,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328103603] [2022-03-19 00:30:01,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:30:01,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 00:30:01,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:30:01,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 00:30:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-19 00:30:01,504 INFO L87 Difference]: Start difference. First operand 695 states and 853 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 00:30:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:30:01,652 INFO L93 Difference]: Finished difference Result 771 states and 912 transitions. [2022-03-19 00:30:01,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 00:30:01,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 128 [2022-03-19 00:30:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:30:01,655 INFO L225 Difference]: With dead ends: 771 [2022-03-19 00:30:01,655 INFO L226 Difference]: Without dead ends: 755 [2022-03-19 00:30:01,656 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-19 00:30:01,657 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:30:01,657 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 127 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:30:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-19 00:30:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 539. [2022-03-19 00:30:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 362 states have (on average 1.1049723756906078) internal successors, (400), 373 states have internal predecessors, (400), 103 states have call successors, (103), 74 states have call predecessors, (103), 73 states have return successors, (101), 91 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-19 00:30:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 604 transitions. [2022-03-19 00:30:01,712 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 604 transitions. Word has length 128 [2022-03-19 00:30:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:30:01,712 INFO L478 AbstractCegarLoop]: Abstraction has 539 states and 604 transitions. [2022-03-19 00:30:01,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 00:30:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 604 transitions. [2022-03-19 00:30:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-03-19 00:30:01,714 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:30:01,714 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:30:01,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 00:30:01,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:30:01,931 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:30:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:30:01,931 INFO L85 PathProgramCache]: Analyzing trace with hash -206704767, now seen corresponding path program 2 times [2022-03-19 00:30:01,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:30:01,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044877006] [2022-03-19 00:30:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:30:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:30:01,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:30:01,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195052949] [2022-03-19 00:30:01,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 00:30:01,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:30:01,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:30:01,953 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:30:01,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 00:30:02,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 00:30:02,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:30:02,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 00:30:02,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:30:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 00:30:02,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:30:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-19 00:30:03,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:30:03,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044877006] [2022-03-19 00:30:03,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:30:03,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195052949] [2022-03-19 00:30:03,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195052949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:30:03,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:30:03,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-19 00:30:03,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566218857] [2022-03-19 00:30:03,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:30:03,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 00:30:03,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:30:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 00:30:03,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 00:30:03,081 INFO L87 Difference]: Start difference. First operand 539 states and 604 transitions. Second operand has 34 states, 34 states have (on average 4.764705882352941) internal successors, (162), 34 states have internal predecessors, (162), 32 states have call successors, (68), 18 states have call predecessors, (68), 17 states have return successors, (66), 30 states have call predecessors, (66), 29 states have call successors, (66) [2022-03-19 00:30:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:30:04,171 INFO L93 Difference]: Finished difference Result 1289 states and 1514 transitions. [2022-03-19 00:30:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 00:30:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.764705882352941) internal successors, (162), 34 states have internal predecessors, (162), 32 states have call successors, (68), 18 states have call predecessors, (68), 17 states have return successors, (66), 30 states have call predecessors, (66), 29 states have call successors, (66) Word has length 224 [2022-03-19 00:30:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:30:04,175 INFO L225 Difference]: With dead ends: 1289 [2022-03-19 00:30:04,175 INFO L226 Difference]: Without dead ends: 1276 [2022-03-19 00:30:04,176 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1212, Invalid=2210, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 00:30:04,177 INFO L912 BasicCegarLoop]: 169 mSDtfsCounter, 823 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 00:30:04,177 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 660 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 00:30:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-03-19 00:30:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1275. [2022-03-19 00:30:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 858 states have (on average 1.118881118881119) internal successors, (960), 885 states have internal predecessors, (960), 247 states have call successors, (247), 170 states have call predecessors, (247), 169 states have return successors, (245), 219 states have call predecessors, (245), 245 states have call successors, (245) [2022-03-19 00:30:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 1452 transitions. [2022-03-19 00:30:04,285 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 1452 transitions. Word has length 224 [2022-03-19 00:30:04,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:30:04,285 INFO L478 AbstractCegarLoop]: Abstraction has 1275 states and 1452 transitions. [2022-03-19 00:30:04,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.764705882352941) internal successors, (162), 34 states have internal predecessors, (162), 32 states have call successors, (68), 18 states have call predecessors, (68), 17 states have return successors, (66), 30 states have call predecessors, (66), 29 states have call successors, (66) [2022-03-19 00:30:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 1452 transitions. [2022-03-19 00:30:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-03-19 00:30:04,292 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:30:04,292 INFO L500 BasicCegarLoop]: trace histogram [65, 64, 64, 27, 26, 26, 26, 26, 26, 26, 26, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:30:04,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-19 00:30:04,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:30:04,508 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:30:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:30:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1366842977, now seen corresponding path program 3 times [2022-03-19 00:30:04,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:30:04,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265152362] [2022-03-19 00:30:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:30:04,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:30:04,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:30:04,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604466810] [2022-03-19 00:30:04,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 00:30:04,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:30:04,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:30:04,521 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:30:04,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 00:30:07,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2022-03-19 00:30:07,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 00:30:07,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 00:30:07,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:30:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 9950 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-19 00:30:08,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:30:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 2038 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2022-03-19 00:30:09,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:30:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265152362] [2022-03-19 00:30:09,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:30:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604466810] [2022-03-19 00:30:09,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604466810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:30:09,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:30:09,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-03-19 00:30:09,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119303786] [2022-03-19 00:30:09,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:30:09,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 00:30:09,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:30:09,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 00:30:09,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 00:30:09,536 INFO L87 Difference]: Start difference. First operand 1275 states and 1452 transitions. Second operand has 66 states, 66 states have (on average 5.121212121212121) internal successors, (338), 66 states have internal predecessors, (338), 64 states have call successors, (132), 34 states have call predecessors, (132), 33 states have return successors, (130), 62 states have call predecessors, (130), 61 states have call successors, (130) [2022-03-19 00:30:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:30:13,125 INFO L93 Difference]: Finished difference Result 2761 states and 3258 transitions. [2022-03-19 00:30:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-19 00:30:13,126 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 5.121212121212121) internal successors, (338), 66 states have internal predecessors, (338), 64 states have call successors, (132), 34 states have call predecessors, (132), 33 states have return successors, (130), 62 states have call predecessors, (130), 61 states have call successors, (130) Word has length 448 [2022-03-19 00:30:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:30:13,134 INFO L225 Difference]: With dead ends: 2761 [2022-03-19 00:30:13,134 INFO L226 Difference]: Without dead ends: 2748 [2022-03-19 00:30:13,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5468, Invalid=9538, Unknown=0, NotChecked=0, Total=15006 [2022-03-19 00:30:13,139 INFO L912 BasicCegarLoop]: 329 mSDtfsCounter, 2490 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 2122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2490 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 3556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2122 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 00:30:13,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2490 Valid, 1327 Invalid, 3556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2122 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 00:30:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2022-03-19 00:30:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2747. [2022-03-19 00:30:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 1850 states have (on average 1.1243243243243244) internal successors, (2080), 1909 states have internal predecessors, (2080), 535 states have call successors, (535), 362 states have call predecessors, (535), 361 states have return successors, (533), 475 states have call predecessors, (533), 533 states have call successors, (533) [2022-03-19 00:30:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3148 transitions. [2022-03-19 00:30:13,430 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3148 transitions. Word has length 448 [2022-03-19 00:30:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:30:13,432 INFO L478 AbstractCegarLoop]: Abstraction has 2747 states and 3148 transitions. [2022-03-19 00:30:13,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 5.121212121212121) internal successors, (338), 66 states have internal predecessors, (338), 64 states have call successors, (132), 34 states have call predecessors, (132), 33 states have return successors, (130), 62 states have call predecessors, (130), 61 states have call successors, (130) [2022-03-19 00:30:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3148 transitions. [2022-03-19 00:30:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 897 [2022-03-19 00:30:13,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:30:13,449 INFO L500 BasicCegarLoop]: trace histogram [129, 128, 128, 59, 58, 58, 58, 58, 58, 58, 58, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:30:13,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-19 00:30:13,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:30:13,661 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:30:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:30:13,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1804844065, now seen corresponding path program 4 times [2022-03-19 00:30:13,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:30:13,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132740823] [2022-03-19 00:30:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:30:13,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:30:13,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:30:13,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127036513] [2022-03-19 00:30:13,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 00:30:13,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:30:13,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:30:13,681 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:30:13,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process