/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 23:12:50,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 23:12:50,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 23:12:50,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 23:12:50,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 23:12:50,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 23:12:50,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 23:12:50,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 23:12:50,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 23:12:50,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 23:12:50,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 23:12:50,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 23:12:50,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 23:12:50,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 23:12:50,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 23:12:50,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 23:12:50,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 23:12:50,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 23:12:50,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 23:12:50,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 23:12:50,532 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 23:12:50,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 23:12:50,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 23:12:50,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 23:12:50,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 23:12:50,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 23:12:50,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 23:12:50,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 23:12:50,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 23:12:50,541 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 23:12:50,555 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 23:12:50,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 23:12:50,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 23:12:50,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 23:12:50,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 23:12:50,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 23:12:50,557 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 23:12:50,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 23:12:50,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 23:12:50,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 23:12:50,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 23:12:50,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 23:12:50,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 23:12:50,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 23:12:50,558 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 23:12:50,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 23:12:50,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 23:12:50,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 23:12:50,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 23:12:50,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:12:50,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 23:12:50,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 23:12:50,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 23:12:50,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 23:12:50,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 23:12:50,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 23:12:50,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 23:12:50,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 23:12:50,559 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 23:12:50,560 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 23:12:50,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 23:12:50,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 23:12:50,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 23:12:50,744 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 23:12:50,744 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 23:12:50,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c [2022-03-18 23:12:50,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6f360ef2/4e56ba1c347c4082933fc71fbf7f1383/FLAG4b72e0936 [2022-03-18 23:12:51,120 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 23:12:51,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c [2022-03-18 23:12:51,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6f360ef2/4e56ba1c347c4082933fc71fbf7f1383/FLAG4b72e0936 [2022-03-18 23:12:51,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6f360ef2/4e56ba1c347c4082933fc71fbf7f1383 [2022-03-18 23:12:51,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 23:12:51,542 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 23:12:51,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 23:12:51,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 23:12:51,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 23:12:51,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31269df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51, skipping insertion in model container [2022-03-18 23:12:51,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 23:12:51,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 23:12:51,703 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c[525,538] [2022-03-18 23:12:51,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:12:51,759 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 23:12:51,767 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound5.c[525,538] [2022-03-18 23:12:51,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 23:12:51,784 INFO L208 MainTranslator]: Completed translation [2022-03-18 23:12:51,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51 WrapperNode [2022-03-18 23:12:51,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 23:12:51,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 23:12:51,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 23:12:51,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 23:12:51,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 23:12:51,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 23:12:51,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 23:12:51,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 23:12:51,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51" (1/1) ... [2022-03-18 23:12:51,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 23:12:51,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:12:51,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 23:12:51,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 23:12:51,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 23:12:51,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 23:12:51,890 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 23:12:51,890 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 23:12:51,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 23:12:51,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 23:12:51,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 23:12:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 23:12:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 23:12:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 23:12:51,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 23:12:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 23:12:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 23:12:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 23:12:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 23:12:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 23:12:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 23:12:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 23:12:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 23:12:51,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 23:12:51,941 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 23:12:51,943 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 23:12:52,131 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 23:12:52,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 23:12:52,136 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 23:12:52,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:12:52 BoogieIcfgContainer [2022-03-18 23:12:52,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 23:12:52,138 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 23:12:52,138 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 23:12:52,139 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 23:12:52,141 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:12:52" (1/1) ... [2022-03-18 23:12:52,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:12:52 BasicIcfg [2022-03-18 23:12:52,170 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 23:12:52,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 23:12:52,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 23:12:52,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 23:12:52,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:12:51" (1/4) ... [2022-03-18 23:12:52,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c19bfff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:12:52, skipping insertion in model container [2022-03-18 23:12:52,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:12:51" (2/4) ... [2022-03-18 23:12:52,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c19bfff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:12:52, skipping insertion in model container [2022-03-18 23:12:52,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:12:52" (3/4) ... [2022-03-18 23:12:52,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c19bfff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 11:12:52, skipping insertion in model container [2022-03-18 23:12:52,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 11:12:52" (4/4) ... [2022-03-18 23:12:52,184 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound5.cqvasr [2022-03-18 23:12:52,188 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 23:12:52,189 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 23:12:52,238 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 23:12:52,245 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 23:12:52,245 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 23:12:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 23:12:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 23:12:52,269 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:12:52,270 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:12:52,271 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:12:52,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:12:52,275 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-03-18 23:12:52,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:12:52,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869718210] [2022-03-18 23:12:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:12:52,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:12:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:12:52,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 23:12:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:12:52,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 23:12:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:12:52,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 23:12:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:12:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 23:12:52,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:12:52,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869718210] [2022-03-18 23:12:52,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869718210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:12:52,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:12:52,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 23:12:52,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727900899] [2022-03-18 23:12:52,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:12:52,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 23:12:52,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:12:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 23:12:52,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:12:52,487 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 23:12:54,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:12:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:12:55,322 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2022-03-18 23:12:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 23:12:55,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 23:12:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:12:55,329 INFO L225 Difference]: With dead ends: 69 [2022-03-18 23:12:55,330 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 23:12:55,332 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 23:12:55,334 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 23:12:55,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 23:12:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 23:12:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 23:12:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 23:12:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-03-18 23:12:55,362 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-03-18 23:12:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:12:55,362 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-03-18 23:12:55,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 23:12:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-03-18 23:12:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 23:12:55,364 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:12:55,364 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:12:55,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 23:12:55,364 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:12:55,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:12:55,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-03-18 23:12:55,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:12:55,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776118839] [2022-03-18 23:12:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:12:55,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:12:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:12:55,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 23:12:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:12:55,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 23:12:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:12:55,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 23:12:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:12:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 23:12:55,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:12:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776118839] [2022-03-18 23:12:55,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776118839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:12:55,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:12:55,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 23:12:55,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474831339] [2022-03-18 23:12:55,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:12:55,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 23:12:55,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:12:55,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 23:12:55,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 23:12:55,566 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 23:13:01,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:13:03,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:13:05,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:13:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:13:07,444 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2022-03-18 23:13:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 23:13:07,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-18 23:13:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:13:07,449 INFO L225 Difference]: With dead ends: 68 [2022-03-18 23:13:07,449 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 23:13:07,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 23:13:07,450 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 52 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-03-18 23:13:07,451 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 53 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 198 Invalid, 3 Unknown, 0 Unchecked, 11.8s Time] [2022-03-18 23:13:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 23:13:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-18 23:13:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 23:13:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-03-18 23:13:07,493 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-03-18 23:13:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:13:07,493 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-03-18 23:13:07,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 23:13:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-03-18 23:13:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 23:13:07,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:13:07,494 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:13:07,494 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 23:13:07,494 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:13:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:13:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-03-18 23:13:07,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:13:07,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934329404] [2022-03-18 23:13:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:13:07,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:13:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:13:07,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 23:13:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:13:07,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 23:13:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:13:07,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 23:13:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:13:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 23:13:07,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:13:07,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934329404] [2022-03-18 23:13:07,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934329404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:13:07,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:13:07,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 23:13:07,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56182203] [2022-03-18 23:13:07,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:13:07,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 23:13:07,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:13:07,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 23:13:07,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 23:13:07,601 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 23:13:10,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:13:12,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:13:15,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:13:18,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 23:13:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:13:20,113 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2022-03-18 23:13:20,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 23:13:20,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-18 23:13:20,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:13:20,115 INFO L225 Difference]: With dead ends: 76 [2022-03-18 23:13:20,116 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 23:13:20,116 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 23:13:20,117 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 69 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-03-18 23:13:20,117 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 54 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 227 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2022-03-18 23:13:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 23:13:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-03-18 23:13:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 32 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-18 23:13:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 100 transitions. [2022-03-18 23:13:20,131 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 100 transitions. Word has length 26 [2022-03-18 23:13:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:13:20,132 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 100 transitions. [2022-03-18 23:13:20,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 23:13:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 100 transitions. [2022-03-18 23:13:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 23:13:20,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:13:20,132 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:13:20,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 23:13:20,133 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:13:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:13:20,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-03-18 23:13:20,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:13:20,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707132250] [2022-03-18 23:13:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:13:20,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:13:20,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:13:20,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380745865] [2022-03-18 23:13:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:13:20,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:13:20,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:13:20,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:13:20,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 23:13:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:13:20,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 23:13:20,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:13:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 23:13:20,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:13:20,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:13:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707132250] [2022-03-18 23:13:20,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:13:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380745865] [2022-03-18 23:13:20,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380745865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:13:20,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:13:20,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:13:20,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142920638] [2022-03-18 23:13:20,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:13:20,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:13:20,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:13:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:13:20,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:13:20,374 INFO L87 Difference]: Start difference. First operand 69 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:13:22,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 23:13:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:13:22,667 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2022-03-18 23:13:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:13:22,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-18 23:13:22,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:13:22,670 INFO L225 Difference]: With dead ends: 80 [2022-03-18 23:13:22,670 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 23:13:22,670 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:13:22,671 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 23:13:22,671 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 23:13:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 23:13:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-18 23:13:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 26 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 23:13:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2022-03-18 23:13:22,685 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 34 [2022-03-18 23:13:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:13:22,686 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2022-03-18 23:13:22,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:13:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2022-03-18 23:13:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 23:13:22,693 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:13:22,693 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:13:22,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 23:13:22,908 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:13:22,908 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:13:22,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:13:22,909 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-03-18 23:13:22,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:13:22,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749809303] [2022-03-18 23:13:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:13:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:13:22,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:13:22,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582365633] [2022-03-18 23:13:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:13:22,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:13:22,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:13:22,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:13:22,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 23:13:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 23:13:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 23:13:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 23:13:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 23:13:23,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 23:13:23,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 23:13:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749809303] [2022-03-18 23:13:23,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 23:13:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582365633] [2022-03-18 23:13:23,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582365633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 23:13:23,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 23:13:23,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 23:13:23,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341625400] [2022-03-18 23:13:23,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 23:13:23,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 23:13:23,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 23:13:23,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 23:13:23,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 23:13:23,083 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:13:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 23:13:23,789 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2022-03-18 23:13:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 23:13:23,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-18 23:13:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 23:13:23,790 INFO L225 Difference]: With dead ends: 70 [2022-03-18 23:13:23,791 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 23:13:23,791 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 23:13:23,792 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 23:13:23,792 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 169 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 23:13:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 23:13:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-18 23:13:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 23:13:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-03-18 23:13:23,803 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 36 [2022-03-18 23:13:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 23:13:23,803 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-03-18 23:13:23,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 23:13:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-03-18 23:13:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 23:13:23,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 23:13:23,808 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 23:13:23,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 23:13:24,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:13:24,013 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 23:13:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 23:13:24,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-03-18 23:13:24,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 23:13:24,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965105080] [2022-03-18 23:13:24,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:13:24,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 23:13:24,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 23:13:24,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840379440] [2022-03-18 23:13:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 23:13:24,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 23:13:24,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 23:13:24,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 23:13:24,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process