/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/hard2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 10:46:12,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 10:46:12,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 10:46:12,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 10:46:12,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 10:46:12,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 10:46:12,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 10:46:12,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 10:46:12,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 10:46:12,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 10:46:12,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 10:46:12,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 10:46:12,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 10:46:12,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 10:46:12,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 10:46:12,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 10:46:12,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 10:46:12,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 10:46:12,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 10:46:12,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 10:46:12,633 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 10:46:12,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 10:46:12,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 10:46:12,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 10:46:12,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 10:46:12,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 10:46:12,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 10:46:12,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 10:46:12,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 10:46:12,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 10:46:12,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 10:46:12,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 10:46:12,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 10:46:12,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 10:46:12,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 10:46:12,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 10:46:12,663 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 10:46:12,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 10:46:12,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 10:46:12,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 10:46:12,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 10:46:12,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 10:46:12,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 10:46:12,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 10:46:12,668 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 10:46:12,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 10:46:12,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 10:46:12,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 10:46:12,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 10:46:12,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:46:12,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 10:46:12,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 10:46:12,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 10:46:12,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 10:46:12,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 10:46:12,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 10:46:12,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 10:46:12,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 10:46:12,671 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 10:46:12,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 10:46:12,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 10:46:12,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 10:46:12,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 10:46:12,883 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 10:46:12,884 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 10:46:12,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard2.c [2022-04-06 10:46:12,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41fb8952d/2c840ac81bdf41799f219377bd57d5c0/FLAG6fc255b30 [2022-04-06 10:46:13,249 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 10:46:13,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c [2022-04-06 10:46:13,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41fb8952d/2c840ac81bdf41799f219377bd57d5c0/FLAG6fc255b30 [2022-04-06 10:46:13,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41fb8952d/2c840ac81bdf41799f219377bd57d5c0 [2022-04-06 10:46:13,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 10:46:13,696 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 10:46:13,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 10:46:13,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 10:46:13,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 10:46:13,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d8e9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13, skipping insertion in model container [2022-04-06 10:46:13,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 10:46:13,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 10:46:13,846 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/hard2.c[526,539] [2022-04-06 10:46:13,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:46:13,874 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 10:46:13,881 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/hard2.c[526,539] [2022-04-06 10:46:13,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 10:46:13,892 INFO L208 MainTranslator]: Completed translation [2022-04-06 10:46:13,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13 WrapperNode [2022-04-06 10:46:13,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 10:46:13,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 10:46:13,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 10:46:13,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 10:46:13,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 10:46:13,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 10:46:13,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 10:46:13,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 10:46:13,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13" (1/1) ... [2022-04-06 10:46:13,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 10:46:13,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:46:13,938 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) [2022-04-06 10:46:13,952 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 [2022-04-06 10:46:13,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 10:46:13,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 10:46:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 10:46:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 10:46:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 10:46:13,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 10:46:13,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 10:46:13,978 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 10:46:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 10:46:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 10:46:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 10:46:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 10:46:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 10:46:13,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 10:46:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 10:46:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 10:46:13,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 10:46:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 10:46:13,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 10:46:13,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 10:46:14,030 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 10:46:14,031 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 10:46:14,122 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 10:46:14,126 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 10:46:14,126 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 10:46:14,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:46:14 BoogieIcfgContainer [2022-04-06 10:46:14,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 10:46:14,128 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 10:46:14,128 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 10:46:14,128 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 10:46:14,130 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:46:14" (1/1) ... [2022-04-06 10:46:14,132 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 10:46:14,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:46:14 BasicIcfg [2022-04-06 10:46:14,142 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 10:46:14,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 10:46:14,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 10:46:14,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 10:46:14,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:46:13" (1/4) ... [2022-04-06 10:46:14,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c340bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:46:14, skipping insertion in model container [2022-04-06 10:46:14,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:46:13" (2/4) ... [2022-04-06 10:46:14,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c340bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:46:14, skipping insertion in model container [2022-04-06 10:46:14,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:46:14" (3/4) ... [2022-04-06 10:46:14,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c340bde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:46:14, skipping insertion in model container [2022-04-06 10:46:14,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 10:46:14" (4/4) ... [2022-04-06 10:46:14,147 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2.cqvasr [2022-04-06 10:46:14,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 10:46:14,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 10:46:14,183 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 10:46:14,189 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 [2022-04-06 10:46:14,189 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 10:46:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 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) [2022-04-06 10:46:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 10:46:14,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:46:14,217 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:46:14,217 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:46:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:46:14,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1059151250, now seen corresponding path program 1 times [2022-04-06 10:46:14,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:46:14,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147055368] [2022-04-06 10:46:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:14,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:46:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:14,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:46:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:46:14,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:46:14,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147055368] [2022-04-06 10:46:14,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147055368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:46:14,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:46:14,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:46:14,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642707604] [2022-04-06 10:46:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:46:14,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:46:14,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:46:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:46:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:46:14,422 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 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 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-04-06 10:46:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:46:14,607 INFO L93 Difference]: Finished difference Result 66 states and 111 transitions. [2022-04-06 10:46:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 10:46:14,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2022-04-06 10:46:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:46:14,614 INFO L225 Difference]: With dead ends: 66 [2022-04-06 10:46:14,614 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 10:46:14,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 10:46:14,618 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:46:14,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:46:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 10:46:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-04-06 10:46:14,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-04-06 10:46:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-04-06 10:46:14,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 11 [2022-04-06 10:46:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:46:14,649 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-04-06 10:46:14,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-04-06 10:46:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-04-06 10:46:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 10:46:14,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:46:14,650 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:46:14,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 10:46:14,650 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:46:14,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:46:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2043934920, now seen corresponding path program 1 times [2022-04-06 10:46:14,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:46:14,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757884480] [2022-04-06 10:46:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:46:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:14,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 10:46:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:14,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 10:46:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 10:46:14,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:46:14,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757884480] [2022-04-06 10:46:14,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757884480] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:46:14,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:46:14,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 10:46:14,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321516788] [2022-04-06 10:46:14,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:46:14,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 10:46:14,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:46:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 10:46:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:46:14,725 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-04-06 10:46:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:46:14,862 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-04-06 10:46:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 10:46:14,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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 16 [2022-04-06 10:46:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:46:14,864 INFO L225 Difference]: With dead ends: 41 [2022-04-06 10:46:14,864 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 10:46:14,870 INFO L912 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 [2022-04-06 10:46:14,873 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:46:14,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:46:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 10:46:14,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-04-06 10:46:14,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-04-06 10:46:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-04-06 10:46:14,882 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 16 [2022-04-06 10:46:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:46:14,882 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-04-06 10:46:14,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-04-06 10:46:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-06 10:46:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 10:46:14,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:46:14,883 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:46:14,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 10:46:14,884 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:46:14,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:46:14,884 INFO L85 PathProgramCache]: Analyzing trace with hash 106953131, now seen corresponding path program 1 times [2022-04-06 10:46:14,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:46:14,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933616216] [2022-04-06 10:46:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:14,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:46:14,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:46:14,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279791150] [2022-04-06 10:46:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:46:14,905 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) [2022-04-06 10:46:14,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 10:46:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 10:46:14,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:46:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 10:46:15,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 10:46:15,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:46:15,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933616216] [2022-04-06 10:46:15,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:46:15,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279791150] [2022-04-06 10:46:15,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279791150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:46:15,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:46:15,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 10:46:15,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082264379] [2022-04-06 10:46:15,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:46:15,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 10:46:15,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:46:15,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 10:46:15,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 10:46:15,098 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-04-06 10:46:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:46:15,143 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2022-04-06 10:46:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 10:46:15,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 21 [2022-04-06 10:46:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:46:15,146 INFO L225 Difference]: With dead ends: 60 [2022-04-06 10:46:15,146 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 10:46:15,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:46:15,148 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:46:15,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:46:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 10:46:15,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 10:46:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 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) [2022-04-06 10:46:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-04-06 10:46:15,159 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-04-06 10:46:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:46:15,160 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-04-06 10:46:15,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-04-06 10:46:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-04-06 10:46:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 10:46:15,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:46:15,160 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:46:15,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 10:46:15,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:15,374 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:46:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:46:15,375 INFO L85 PathProgramCache]: Analyzing trace with hash 606156080, now seen corresponding path program 1 times [2022-04-06 10:46:15,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:46:15,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085488248] [2022-04-06 10:46:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:15,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:46:15,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:46:15,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018333623] [2022-04-06 10:46:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:15,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:15,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:46:15,397 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) [2022-04-06 10:46:15,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 10:46:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 10:46:15,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:46:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 10:46:15,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 10:46:15,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:46:15,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085488248] [2022-04-06 10:46:15,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:46:15,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018333623] [2022-04-06 10:46:15,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018333623] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:46:15,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:46:15,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 10:46:15,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651552076] [2022-04-06 10:46:15,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:46:15,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 10:46:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:46:15,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 10:46:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 10:46:15,545 INFO L87 Difference]: Start difference. First operand 46 states and 57 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) [2022-04-06 10:46:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:46:15,587 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-04-06 10:46:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 10:46:15,588 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 28 [2022-04-06 10:46:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:46:15,589 INFO L225 Difference]: With dead ends: 59 [2022-04-06 10:46:15,589 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 10:46:15,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 10:46:15,591 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:46:15,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:46:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 10:46:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-04-06 10:46:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 10:46:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-04-06 10:46:15,610 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 28 [2022-04-06 10:46:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:46:15,610 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-04-06 10:46:15,610 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) [2022-04-06 10:46:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-04-06 10:46:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 10:46:15,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:46:15,611 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:46:15,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 10:46:15,811 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,SelfDestructingSolverStorable3 [2022-04-06 10:46:15,812 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:46:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:46:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash 312970699, now seen corresponding path program 1 times [2022-04-06 10:46:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:46:15,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055796120] [2022-04-06 10:46:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:15,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:46:15,824 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:46:15,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712456643] [2022-04-06 10:46:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:15,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:15,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:46:15,830 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) [2022-04-06 10:46:15,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 10:46:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:15,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 10:46:15,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:46:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 10:46:16,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:46:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 10:46:16,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:46:16,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055796120] [2022-04-06 10:46:16,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:46:16,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712456643] [2022-04-06 10:46:16,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712456643] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 10:46:16,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 10:46:16,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 10:46:16,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763186727] [2022-04-06 10:46:16,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:46:16,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 10:46:16,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:46:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 10:46:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 10:46:16,105 INFO L87 Difference]: Start difference. First operand 51 states and 63 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, (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) [2022-04-06 10:46:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:46:16,150 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-04-06 10:46:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 10:46:16,151 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, (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 38 [2022-04-06 10:46:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:46:16,152 INFO L225 Difference]: With dead ends: 63 [2022-04-06 10:46:16,152 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 10:46:16,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 10:46:16,153 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:46:16,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 89 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:46:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 10:46:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-04-06 10:46:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 10:46:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-04-06 10:46:16,160 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 38 [2022-04-06 10:46:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:46:16,160 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-04-06 10:46:16,160 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, (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) [2022-04-06 10:46:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-04-06 10:46:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 10:46:16,161 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:46:16,161 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:46:16,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 10:46:16,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:16,382 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:46:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:46:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1500982750, now seen corresponding path program 1 times [2022-04-06 10:46:16,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:46:16,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515760314] [2022-04-06 10:46:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:46:16,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:46:16,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327938342] [2022-04-06 10:46:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:16,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:46:16,392 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) [2022-04-06 10:46:16,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 10:46:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 10:46:16,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:46:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 10:46:16,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:46:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 10:46:17,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:46:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515760314] [2022-04-06 10:46:17,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:46:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327938342] [2022-04-06 10:46:17,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327938342] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:46:17,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:46:17,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 10:46:17,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2555352] [2022-04-06 10:46:17,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:46:17,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 10:46:17,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:46:17,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 10:46:17,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 10:46:17,472 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-04-06 10:46:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:46:19,846 INFO L93 Difference]: Finished difference Result 148 states and 204 transitions. [2022-04-06 10:46:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 10:46:19,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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 58 [2022-04-06 10:46:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:46:19,848 INFO L225 Difference]: With dead ends: 148 [2022-04-06 10:46:19,848 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 10:46:19,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-06 10:46:19,849 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 10:46:19,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 171 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 10:46:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 10:46:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2022-04-06 10:46:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 67 states have internal predecessors, (78), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 10:46:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2022-04-06 10:46:19,861 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 58 [2022-04-06 10:46:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:46:19,887 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2022-04-06 10:46:19,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-04-06 10:46:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2022-04-06 10:46:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 10:46:19,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:46:19,888 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2022-04-06 10:46:19,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 10:46:20,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:20,103 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:46:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:46:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash -781577916, now seen corresponding path program 1 times [2022-04-06 10:46:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:46:20,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77535308] [2022-04-06 10:46:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:20,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:46:20,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:46:20,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897457650] [2022-04-06 10:46:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:20,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:46:20,112 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) [2022-04-06 10:46:20,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 10:46:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:20,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 10:46:20,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:46:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 10:46:20,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:46:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 10:46:20,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:46:20,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77535308] [2022-04-06 10:46:20,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:46:20,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897457650] [2022-04-06 10:46:20,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897457650] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:46:20,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:46:20,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 10:46:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401364653] [2022-04-06 10:46:20,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:46:20,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 10:46:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:46:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 10:46:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 10:46:20,702 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 10:46:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:46:20,968 INFO L93 Difference]: Finished difference Result 163 states and 213 transitions. [2022-04-06 10:46:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 10:46:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 69 [2022-04-06 10:46:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:46:20,970 INFO L225 Difference]: With dead ends: 163 [2022-04-06 10:46:20,970 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 10:46:20,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-04-06 10:46:20,971 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 10:46:20,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 99 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 10:46:20,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 10:46:20,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2022-04-06 10:46:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 60 states have internal predecessors, (67), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 10:46:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2022-04-06 10:46:20,989 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 69 [2022-04-06 10:46:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:46:20,990 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2022-04-06 10:46:20,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 10:46:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2022-04-06 10:46:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 10:46:20,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:46:20,991 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 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] [2022-04-06 10:46:21,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 10:46:21,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:21,201 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:46:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:46:21,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1979995209, now seen corresponding path program 1 times [2022-04-06 10:46:21,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:46:21,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011050763] [2022-04-06 10:46:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:21,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:46:21,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:46:21,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492100637] [2022-04-06 10:46:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:21,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:21,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:46:21,211 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) [2022-04-06 10:46:21,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 10:46:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:46:21,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 10:46:21,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:46:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-06 10:46:21,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 10:46:21,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:46:21,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011050763] [2022-04-06 10:46:21,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:46:21,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492100637] [2022-04-06 10:46:21,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492100637] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 10:46:21,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 10:46:21,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 10:46:21,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185879590] [2022-04-06 10:46:21,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 10:46:21,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 10:46:21,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:46:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 10:46:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-06 10:46:21,411 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-04-06 10:46:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:46:21,453 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2022-04-06 10:46:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 10:46:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 78 [2022-04-06 10:46:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:46:21,455 INFO L225 Difference]: With dead ends: 109 [2022-04-06 10:46:21,455 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 10:46:21,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-06 10:46:21,456 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 10:46:21,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 90 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 10:46:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 10:46:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-04-06 10:46:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 10:46:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2022-04-06 10:46:21,465 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 78 [2022-04-06 10:46:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:46:21,466 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2022-04-06 10:46:21,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-04-06 10:46:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2022-04-06 10:46:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 10:46:21,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:46:21,472 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:46:21,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 10:46:21,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:21,676 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:46:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:46:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1650636816, now seen corresponding path program 2 times [2022-04-06 10:46:21,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:46:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008999324] [2022-04-06 10:46:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:46:21,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:46:21,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:46:21,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402899621] [2022-04-06 10:46:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:46:21,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:46:21,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:46:21,686 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) [2022-04-06 10:46:21,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 10:46:21,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:46:21,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:46:21,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 10:46:21,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:46:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 10:46:22,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:46:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 10:46:45,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:46:45,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008999324] [2022-04-06 10:46:45,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:46:45,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402899621] [2022-04-06 10:46:45,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402899621] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:46:45,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:46:45,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 10:46:45,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231306050] [2022-04-06 10:46:45,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:46:45,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 10:46:45,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:46:45,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 10:46:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2022-04-06 10:46:45,116 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-04-06 10:46:57,078 WARN L232 SmtUtils]: Spent 11.57s on a formula simplification. DAG size of input: 192 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 10:47:04,717 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 [] [2022-04-06 10:47:07,938 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 [] [2022-04-06 10:47:07,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:47:07,971 INFO L93 Difference]: Finished difference Result 222 states and 299 transitions. [2022-04-06 10:47:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 10:47:07,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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 88 [2022-04-06 10:47:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:47:07,974 INFO L225 Difference]: With dead ends: 222 [2022-04-06 10:47:07,974 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 10:47:07,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-04-06 10:47:07,975 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 85 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 191 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:47:07,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 255 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 760 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2022-04-06 10:47:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 10:47:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2022-04-06 10:47:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 96 states have (on average 1.21875) internal successors, (117), 100 states have internal predecessors, (117), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 10:47:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 211 transitions. [2022-04-06 10:47:07,998 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 211 transitions. Word has length 88 [2022-04-06 10:47:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:47:07,998 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 211 transitions. [2022-04-06 10:47:07,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-04-06 10:47:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 211 transitions. [2022-04-06 10:47:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 10:47:08,005 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:47:08,006 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 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] [2022-04-06 10:47:08,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 10:47:08,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:47:08,212 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:47:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:47:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1538097783, now seen corresponding path program 1 times [2022-04-06 10:47:08,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:47:08,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894928169] [2022-04-06 10:47:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:47:08,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:47:08,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:47:08,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768943122] [2022-04-06 10:47:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:47:08,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:47:08,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:47:08,220 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) [2022-04-06 10:47:08,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 10:47:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 10:47:08,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 10:47:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:47:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 10:47:08,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:47:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 10:47:09,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:47:09,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894928169] [2022-04-06 10:47:09,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:47:09,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768943122] [2022-04-06 10:47:09,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768943122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:47:09,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:47:09,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 10:47:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017177561] [2022-04-06 10:47:09,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:47:09,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 10:47:09,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:47:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 10:47:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-06 10:47:09,229 INFO L87 Difference]: Start difference. First operand 160 states and 211 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-04-06 10:47:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:47:09,523 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2022-04-06 10:47:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 10:47:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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 104 [2022-04-06 10:47:09,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:47:09,525 INFO L225 Difference]: With dead ends: 176 [2022-04-06 10:47:09,525 INFO L226 Difference]: Without dead ends: 168 [2022-04-06 10:47:09,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-06 10:47:09,526 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 10:47:09,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 282 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 10:47:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-06 10:47:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-04-06 10:47:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.21) internal successors, (121), 104 states have internal predecessors, (121), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-04-06 10:47:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 223 transitions. [2022-04-06 10:47:09,541 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 223 transitions. Word has length 104 [2022-04-06 10:47:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:47:09,541 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 223 transitions. [2022-04-06 10:47:09,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-04-06 10:47:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 223 transitions. [2022-04-06 10:47:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 10:47:09,543 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:47:09,543 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:47:09,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 10:47:09,769 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,SelfDestructingSolverStorable9 [2022-04-06 10:47:09,770 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:47:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:47:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -191386235, now seen corresponding path program 2 times [2022-04-06 10:47:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:47:09,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542367475] [2022-04-06 10:47:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:47:09,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:47:09,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:47:09,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347609430] [2022-04-06 10:47:09,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 10:47:09,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:47:09,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:47:09,779 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) [2022-04-06 10:47:09,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 10:47:09,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 10:47:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:47:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 10:47:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:47:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-04-06 10:47:10,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:47:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 10:47:10,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:47:10,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542367475] [2022-04-06 10:47:10,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:47:10,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347609430] [2022-04-06 10:47:10,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347609430] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:47:10,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:47:10,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 10:47:10,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350885045] [2022-04-06 10:47:10,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:47:10,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 10:47:10,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:47:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 10:47:10,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:47:10,308 INFO L87 Difference]: Start difference. First operand 168 states and 223 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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) [2022-04-06 10:47:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:47:10,378 INFO L93 Difference]: Finished difference Result 197 states and 260 transitions. [2022-04-06 10:47:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 10:47:10,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 117 [2022-04-06 10:47:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:47:10,380 INFO L225 Difference]: With dead ends: 197 [2022-04-06 10:47:10,380 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 10:47:10,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 223 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 10:47:10,381 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:47:10,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 137 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:47:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 10:47:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-04-06 10:47:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-04-06 10:47:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2022-04-06 10:47:10,392 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 117 [2022-04-06 10:47:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:47:10,393 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2022-04-06 10:47:10,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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) [2022-04-06 10:47:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2022-04-06 10:47:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 10:47:10,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:47:10,394 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:47:10,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 10:47:10,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:47:10,594 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:47:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:47:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash 525706014, now seen corresponding path program 3 times [2022-04-06 10:47:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:47:10,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999618055] [2022-04-06 10:47:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:47:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:47:10,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:47:10,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335994704] [2022-04-06 10:47:10,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:47:10,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:47:10,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:47:10,603 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) [2022-04-06 10:47:10,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 10:47:10,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 10:47:10,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:47:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 10:47:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:47:10,892 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 10:47:10,926 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 10:47:10,983 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 10:47:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-04-06 10:47:11,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:47:17,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:47:17,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999618055] [2022-04-06 10:47:17,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:47:17,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335994704] [2022-04-06 10:47:17,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335994704] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 10:47:17,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 10:47:17,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 10:47:17,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189459539] [2022-04-06 10:47:17,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 10:47:17,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 10:47:17,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:47:17,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 10:47:17,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 10:47:17,872 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2022-04-06 10:47:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:47:17,955 INFO L93 Difference]: Finished difference Result 136 states and 166 transitions. [2022-04-06 10:47:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 10:47:17,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 118 [2022-04-06 10:47:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:47:17,958 INFO L225 Difference]: With dead ends: 136 [2022-04-06 10:47:17,958 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 10:47:17,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-04-06 10:47:17,959 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 10:47:17,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 65 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:47:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 10:47:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2022-04-06 10:47:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 28 states have call successors, (28), 16 states have call predecessors, (28), 14 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 10:47:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2022-04-06 10:47:17,969 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 118 [2022-04-06 10:47:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:47:17,969 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2022-04-06 10:47:17,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2022-04-06 10:47:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2022-04-06 10:47:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 10:47:17,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 10:47:17,970 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:47:18,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 10:47:18,179 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,SelfDestructingSolverStorable11 [2022-04-06 10:47:18,179 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 10:47:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 10:47:18,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1635698089, now seen corresponding path program 3 times [2022-04-06 10:47:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 10:47:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777911435] [2022-04-06 10:47:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 10:47:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 10:47:18,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 10:47:18,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212543925] [2022-04-06 10:47:18,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 10:47:18,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 10:47:18,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 10:47:18,189 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) [2022-04-06 10:47:18,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 10:47:18,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 10:47:18,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 10:47:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 10:47:18,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 10:47:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-04-06 10:47:18,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 10:47:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-04-06 10:47:18,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 10:47:18,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777911435] [2022-04-06 10:47:18,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 10:47:18,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212543925] [2022-04-06 10:47:18,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212543925] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 10:47:18,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 10:47:18,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 10:47:18,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322606289] [2022-04-06 10:47:18,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 10:47:18,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 10:47:18,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 10:47:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 10:47:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-04-06 10:47:18,555 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-04-06 10:47:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 10:47:18,643 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2022-04-06 10:47:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 10:47:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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 121 [2022-04-06 10:47:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 10:47:18,644 INFO L225 Difference]: With dead ends: 120 [2022-04-06 10:47:18,644 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 10:47:18,644 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 10:47:18,645 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 70 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 [2022-04-06 10:47:18,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 70 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 10:47:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 10:47:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 10:47:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 10:47:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 10:47:18,645 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2022-04-06 10:47:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 10:47:18,646 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 10:47:18,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-04-06 10:47:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 10:47:18,646 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 10:47:18,648 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 10:47:18,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 10:47:18,856 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,SelfDestructingSolverStorable12 [2022-04-06 10:47:18,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 10:47:30,977 WARN L232 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 144 DAG size of output: 16 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 10:47:35,608 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 10:47:35,608 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 10:47:35,608 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 10:47:35,608 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 10:47:35,608 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 10:47:35,608 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 10:47:35,608 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 10:47:35,609 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 60) the Hoare annotation is: true [2022-04-06 10:47:35,609 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 41) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-04-06 10:47:35,609 INFO L882 garLoopResultBuilder]: For program point L51-2(lines 22 60) no Hoare annotation was computed. [2022-04-06 10:47:35,609 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-04-06 10:47:35,609 INFO L878 garLoopResultBuilder]: At program point L43-1(lines 43 55) the Hoare annotation is: (and (<= 1 main_~B~0) (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 1 main_~p~0) (= main_~B~0 main_~d~0)) [2022-04-06 10:47:35,609 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (* main_~B~0 main_~p~0) main_~d~0) (<= 1 main_~p~0) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-04-06 10:47:35,609 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-04-06 10:47:35,609 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (= main_~B~0 main_~d~0))) (or (and (= main_~B~0 1) .cse0 (= main_~p~0 1)) (and (<= 1 main_~B~0) (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 1 main_~p~0) .cse0))) [2022-04-06 10:47:35,609 INFO L878 garLoopResultBuilder]: At program point L44-1(line 44) the Hoare annotation is: (let ((.cse1 (* main_~B~0 main_~q~0))) (let ((.cse0 (div main_~p~0 2)) (.cse2 (= (+ .cse1 main_~r~0) main_~A~0))) (or (and (<= 1 .cse0) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse1 main_~r~0)) (= main_~B~0 1) .cse2) (and (= (let ((.cse3 (div main_~d~0 2))) (+ (div .cse3 2) main_~A~0 .cse3)) (+ .cse1 main_~r~0 (* main_~B~0 (div .cse0 2)) (* main_~B~0 .cse0))) (<= 1 main_~B~0) .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1))))) [2022-04-06 10:47:35,609 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-04-06 10:47:35,609 INFO L882 garLoopResultBuilder]: For program point L58(line 58) no Hoare annotation was computed. [2022-04-06 10:47:35,609 INFO L882 garLoopResultBuilder]: For program point L45(lines 43 55) no Hoare annotation was computed. [2022-04-06 10:47:35,609 INFO L882 garLoopResultBuilder]: For program point L36(lines 33 41) no Hoare annotation was computed. [2022-04-06 10:47:35,609 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 60) no Hoare annotation was computed. [2022-04-06 10:47:35,609 INFO L882 garLoopResultBuilder]: For program point L51(lines 51 54) no Hoare annotation was computed. [2022-04-06 10:47:35,609 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 60) no Hoare annotation was computed. [2022-04-06 10:47:35,610 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 10:47:35,610 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-04-06 10:47:35,610 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-04-06 10:47:35,610 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-04-06 10:47:35,610 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-04-06 10:47:35,610 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-04-06 10:47:35,612 INFO L719 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 10:47:35,613 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 10:47:35,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 10:47:35 BasicIcfg [2022-04-06 10:47:35,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 10:47:35,623 INFO L158 Benchmark]: Toolchain (without parser) took 81926.84ms. Allocated memory was 255.9MB in the beginning and 389.0MB in the end (delta: 133.2MB). Free memory was 197.9MB in the beginning and 134.0MB in the end (delta: 63.9MB). Peak memory consumption was 207.3MB. Max. memory is 8.0GB. [2022-04-06 10:47:35,623 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory was 214.1MB in the beginning and 213.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 10:47:35,623 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.61ms. Allocated memory was 255.9MB in the beginning and 324.0MB in the end (delta: 68.2MB). Free memory was 197.6MB in the beginning and 295.9MB in the end (delta: -98.3MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-04-06 10:47:35,623 INFO L158 Benchmark]: Boogie Preprocessor took 16.81ms. Allocated memory is still 324.0MB. Free memory was 295.9MB in the beginning and 294.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 10:47:35,624 INFO L158 Benchmark]: RCFGBuilder took 216.85ms. Allocated memory is still 324.0MB. Free memory was 294.3MB in the beginning and 282.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 10:47:35,624 INFO L158 Benchmark]: IcfgTransformer took 14.59ms. Allocated memory is still 324.0MB. Free memory was 282.3MB in the beginning and 280.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 10:47:35,624 INFO L158 Benchmark]: TraceAbstraction took 81479.28ms. Allocated memory was 324.0MB in the beginning and 389.0MB in the end (delta: 65.0MB). Free memory was 280.2MB in the beginning and 134.0MB in the end (delta: 146.2MB). Peak memory consumption was 222.7MB. Max. memory is 8.0GB. [2022-04-06 10:47:35,625 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 255.9MB. Free memory was 214.1MB in the beginning and 213.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.61ms. Allocated memory was 255.9MB in the beginning and 324.0MB in the end (delta: 68.2MB). Free memory was 197.6MB in the beginning and 295.9MB in the end (delta: -98.3MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.81ms. Allocated memory is still 324.0MB. Free memory was 295.9MB in the beginning and 294.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 216.85ms. Allocated memory is still 324.0MB. Free memory was 294.3MB in the beginning and 282.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 14.59ms. Allocated memory is still 324.0MB. Free memory was 282.3MB in the beginning and 280.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 81479.28ms. Allocated memory was 324.0MB in the beginning and 389.0MB in the end (delta: 65.0MB). Free memory was 280.2MB in the beginning and 134.0MB in the end (delta: 146.2MB). Peak memory consumption was 222.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 81.4s, OverallIterations: 13, TraceHistogramMax: 20, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 26.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 16.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 369 SdHoareTripleChecker+Valid, 10.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 307 mSDsluCounter, 1532 SdHoareTripleChecker+Invalid, 10.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1071 mSDsCounter, 428 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2307 IncrementalHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 428 mSolverCounterUnsat, 461 mSDtfsCounter, 2307 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1477 GetRequests, 1334 SyntacticMatches, 22 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 23.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred in iteration=10, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 126 PreInvPairs, 186 NumberOfFragments, 453 HoareAnnotationTreeSize, 126 FomulaSimplifications, 554 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 13 FomulaSimplificationsInter, 13266 FormulaSimplificationTreeSizeReductionInter, 16.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 34.7s InterpolantComputationTime, 867 NumberOfCodeBlocks, 745 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1442 ConstructedInterpolants, 0 QuantifiedInterpolants, 15881 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1855 ConjunctsInSsa, 195 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 6338/6540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((q == 0 && B == 1) && B * q + r == A) && B == d) && p == 1) || ((((B * 2 == d && p == 2) && q == 0) && B == 1) && B * q + r == A)) || ((((1 <= p / 2 / 2 && A + d == B * p + B * q + r) && q == 0) && B == 1) && B * q + r == A) RESULT: Ultimate proved your program to be correct! [2022-04-06 10:47:35,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...