/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/prod4br-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:16:20,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:16:20,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:16:20,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:16:20,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:16:20,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:16:20,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:16:20,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:16:20,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:16:20,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:16:20,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:16:20,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:16:20,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:16:20,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:16:20,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:16:20,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:16:20,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:16:20,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:16:20,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:16:20,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:16:20,648 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:16:20,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:16:20,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:16:20,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:16:20,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:16:20,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 09:16:20,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:16:20,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:16:20,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:16:20,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:16:20,682 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:16:20,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:16:20,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:16:20,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:16:20,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:16:20,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:16:20,685 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:16:20,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:16:20,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:16:20,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:16:20,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:16:20,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:16:20,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:16:20,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:16:20,686 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:16:20,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:16:20,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:16:20,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:16:20,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:16:20,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:16:20,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:16:20,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:16:20,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:16:20,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:16:20,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:16:20,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:16:20,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:16:20,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:16:20,688 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:16:20,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:16:20,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:16:20,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:16:20,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:16:20,881 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:16:20,882 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:16:20,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2022-03-20 09:16:20,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc75ed3a0/f0a82c78ad584b68a42ef98b2ec1aec1/FLAG92169bbaf [2022-03-20 09:16:21,305 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:16:21,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2022-03-20 09:16:21,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc75ed3a0/f0a82c78ad584b68a42ef98b2ec1aec1/FLAG92169bbaf [2022-03-20 09:16:21,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc75ed3a0/f0a82c78ad584b68a42ef98b2ec1aec1 [2022-03-20 09:16:21,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:16:21,322 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:16:21,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:16:21,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:16:21,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:16:21,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@244584e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21, skipping insertion in model container [2022-03-20 09:16:21,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:16:21,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:16:21,465 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/prod4br-ll.c[524,537] [2022-03-20 09:16:21,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:16:21,500 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:16:21,510 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/prod4br-ll.c[524,537] [2022-03-20 09:16:21,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:16:21,537 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:16:21,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21 WrapperNode [2022-03-20 09:16:21,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:16:21,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:16:21,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:16:21,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:16:21,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:16:21,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:16:21,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:16:21,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:16:21,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:16:21,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:21,614 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) [2022-03-20 09:16:21,626 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 [2022-03-20 09:16:21,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:16:21,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:16:21,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:16:21,644 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:16:21,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:16:21,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:16:21,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:16:21,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:16:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:16:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:16:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 09:16:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:16:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:16:21,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:16:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:16:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:16:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:16:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:16:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:16:21,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:16:21,693 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:16:21,694 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:16:21,849 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:16:21,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:16:21,853 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 09:16:21,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:16:21 BoogieIcfgContainer [2022-03-20 09:16:21,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:16:21,855 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:16:21,855 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:16:21,856 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:16:21,858 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:16:21" (1/1) ... [2022-03-20 09:16:21,860 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:16:21,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:16:21 BasicIcfg [2022-03-20 09:16:21,888 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:16:21,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:16:21,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:16:21,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:16:21,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:16:21" (1/4) ... [2022-03-20 09:16:21,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c1550a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:16:21, skipping insertion in model container [2022-03-20 09:16:21,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:16:21" (2/4) ... [2022-03-20 09:16:21,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c1550a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:16:21, skipping insertion in model container [2022-03-20 09:16:21,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:16:21" (3/4) ... [2022-03-20 09:16:21,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c1550a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:16:21, skipping insertion in model container [2022-03-20 09:16:21,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:16:21" (4/4) ... [2022-03-20 09:16:21,893 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll.cqvasr [2022-03-20 09:16:21,897 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:16:21,897 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:16:21,958 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:16:21,963 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 [2022-03-20 09:16:21,963 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:16:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 09:16:21,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 09:16:21,987 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:21,987 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:21,988 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:21,991 INFO L85 PathProgramCache]: Analyzing trace with hash 447151700, now seen corresponding path program 1 times [2022-03-20 09:16:21,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:21,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214101071] [2022-03-20 09:16:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:21,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:22,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:16:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:22,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:16:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:22,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:22,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214101071] [2022-03-20 09:16:22,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214101071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:16:22,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:16:22,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:16:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600455551] [2022-03-20 09:16:22,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:16:22,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:16:22,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:16:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:16:22,132 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:16:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:22,169 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-03-20 09:16:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:16:22,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 09:16:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:22,176 INFO L225 Difference]: With dead ends: 53 [2022-03-20 09:16:22,176 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 09:16:22,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:16:22,182 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:22,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:16:22,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 09:16:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 09:16:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 09:16:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-03-20 09:16:22,207 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-03-20 09:16:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:22,207 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-03-20 09:16:22,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:16:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-03-20 09:16:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 09:16:22,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:22,208 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:22,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:16:22,208 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1358425930, now seen corresponding path program 1 times [2022-03-20 09:16:22,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:22,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260087060] [2022-03-20 09:16:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:22,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:22,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:22,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741949022] [2022-03-20 09:16:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:22,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:22,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:22,223 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) [2022-03-20 09:16:22,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:16:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:22,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 09:16:22,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:22,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:16:22,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:22,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260087060] [2022-03-20 09:16:22,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:22,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741949022] [2022-03-20 09:16:22,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741949022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:16:22,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:16:22,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:16:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226669854] [2022-03-20 09:16:22,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:16:22,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:16:22,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:22,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:16:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:16:22,391 INFO L87 Difference]: Start difference. First operand 26 states and 31 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:16:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:22,457 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-20 09:16:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:16:22,458 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 09:16:22,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:22,459 INFO L225 Difference]: With dead ends: 40 [2022-03-20 09:16:22,459 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 09:16:22,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:16:22,460 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:22,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:16:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 09:16:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-03-20 09:16:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 09:16:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-20 09:16:22,467 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2022-03-20 09:16:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:22,468 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-20 09:16:22,468 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:16:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-20 09:16:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 09:16:22,469 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:22,469 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:22,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:22,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:22,687 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash -442844594, now seen corresponding path program 1 times [2022-03-20 09:16:22,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:22,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046413039] [2022-03-20 09:16:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:22,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:22,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:22,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293641787] [2022-03-20 09:16:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:22,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:22,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:22,706 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) [2022-03-20 09:16:22,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:16:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 09:16:22,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:23,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:16:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:23,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:23,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046413039] [2022-03-20 09:16:23,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:23,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293641787] [2022-03-20 09:16:23,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293641787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:16:23,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:16:23,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 09:16:23,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423315874] [2022-03-20 09:16:23,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:16:23,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 09:16:23,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 09:16:23,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 09:16:23,248 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:16:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:23,514 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-03-20 09:16:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 09:16:23,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 23 [2022-03-20 09:16:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:23,517 INFO L225 Difference]: With dead ends: 48 [2022-03-20 09:16:23,517 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 09:16:23,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-20 09:16:23,521 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:23,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 147 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:16:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 09:16:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2022-03-20 09:16:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 09:16:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-20 09:16:23,530 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 23 [2022-03-20 09:16:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:23,530 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-20 09:16:23,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:16:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-20 09:16:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 09:16:23,531 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:23,531 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:23,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:23,731 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,SelfDestructingSolverStorable2 [2022-03-20 09:16:23,731 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash 795224065, now seen corresponding path program 1 times [2022-03-20 09:16:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277794871] [2022-03-20 09:16:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:23,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:23,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:23,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145346283] [2022-03-20 09:16:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:23,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:23,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:23,744 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) [2022-03-20 09:16:23,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:16:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:23,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 09:16:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:24,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:16:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:16:25,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277794871] [2022-03-20 09:16:25,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145346283] [2022-03-20 09:16:25,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145346283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:16:25,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:16:25,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-03-20 09:16:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507755174] [2022-03-20 09:16:25,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:16:25,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 09:16:25,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:25,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 09:16:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 09:16:25,465 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:16:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:27,117 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-03-20 09:16:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 09:16:27,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2022-03-20 09:16:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:27,122 INFO L225 Difference]: With dead ends: 62 [2022-03-20 09:16:27,122 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 09:16:27,123 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-20 09:16:27,123 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:27,123 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 189 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 09:16:27,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 09:16:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 32. [2022-03-20 09:16:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 09:16:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 09:16:27,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2022-03-20 09:16:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:27,130 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 09:16:27,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 09:16:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 09:16:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 09:16:27,130 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:27,130 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:27,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 09:16:27,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:27,331 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:27,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1273934516, now seen corresponding path program 1 times [2022-03-20 09:16:27,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:27,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027285329] [2022-03-20 09:16:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:27,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:27,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:27,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320343661] [2022-03-20 09:16:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:27,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:27,344 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:16:27,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:16:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 09:16:27,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:16:27,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:16:27,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:27,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027285329] [2022-03-20 09:16:27,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:27,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320343661] [2022-03-20 09:16:27,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320343661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:16:27,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:16:27,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 09:16:27,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883636231] [2022-03-20 09:16:27,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:16:27,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 09:16:27,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:27,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 09:16:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:16:27,435 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 09:16:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:27,523 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-03-20 09:16:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 09:16:27,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-03-20 09:16:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:27,525 INFO L225 Difference]: With dead ends: 44 [2022-03-20 09:16:27,525 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 09:16:27,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 09:16:27,526 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:27,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 133 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:16:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 09:16:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-20 09:16:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 09:16:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-03-20 09:16:27,531 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 28 [2022-03-20 09:16:27,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:27,531 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-03-20 09:16:27,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 09:16:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-03-20 09:16:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 09:16:27,532 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:16:27,532 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:16:27,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:27,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:27,733 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:16:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:16:27,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1565978524, now seen corresponding path program 1 times [2022-03-20 09:16:27,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:16:27,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357821919] [2022-03-20 09:16:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:16:27,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:16:27,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419715512] [2022-03-20 09:16:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:16:27,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:27,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:16:27,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:16:27,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:16:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:16:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 09:16:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:16:27,864 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 09:16:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 09:16:27,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:16:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 09:16:27,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:16:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357821919] [2022-03-20 09:16:27,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:16:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419715512] [2022-03-20 09:16:27,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419715512] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 09:16:27,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:16:27,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 09:16:27,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41732626] [2022-03-20 09:16:27,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:16:27,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:16:27,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:16:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:16:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:16:27,962 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 09:16:28,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:16:28,089 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-03-20 09:16:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:16:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 [2022-03-20 09:16:28,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:16:28,090 INFO L225 Difference]: With dead ends: 37 [2022-03-20 09:16:28,090 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 09:16:28,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:16:28,091 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:16:28,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 99 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:16:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 09:16:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 09:16:28,091 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) [2022-03-20 09:16:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 09:16:28,092 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2022-03-20 09:16:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:16:28,092 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 09:16:28,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 09:16:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 09:16:28,092 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 09:16:28,094 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 09:16:28,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:16:28,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:16:28,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 09:16:34,861 WARN L232 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 72 DAG size of output: 13 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 09:16:42,814 WARN L232 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 72 DAG size of output: 13 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 09:16:42,816 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|)) [2022-03-20 09:16:42,816 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:16:42,816 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:16:42,816 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 09:16:42,816 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 09:16:42,816 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:16:42,816 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:16:42,816 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-20 09:16:42,816 INFO L882 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-03-20 09:16:42,816 INFO L882 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-03-20 09:16:42,816 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-03-20 09:16:42,816 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 58) the Hoare annotation is: true [2022-03-20 09:16:42,816 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L878 garLoopResultBuilder]: At program point L45-2(lines 32 53) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0)) [2022-03-20 09:16:42,817 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 53) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-20 09:16:42,817 INFO L878 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0)) [2022-03-20 09:16:42,817 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point L33-1(lines 32 53) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point L56(line 56) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point L38(lines 38 52) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 19 58) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point L42(lines 42 52) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 19 58) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point L45(lines 45 52) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-03-20 09:16:42,817 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-03-20 09:16:42,818 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-03-20 09:16:42,818 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-03-20 09:16:42,820 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-03-20 09:16:42,820 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 09:16:42,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:16:42 BasicIcfg [2022-03-20 09:16:42,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 09:16:42,829 INFO L158 Benchmark]: Toolchain (without parser) took 21506.39ms. Allocated memory was 230.7MB in the beginning and 307.2MB in the end (delta: 76.5MB). Free memory was 204.6MB in the beginning and 239.2MB in the end (delta: -34.5MB). Peak memory consumption was 144.3MB. Max. memory is 8.0GB. [2022-03-20 09:16:42,829 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 230.7MB. Free memory is still 189.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 09:16:42,829 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.87ms. Allocated memory was 230.7MB in the beginning and 307.2MB in the end (delta: 76.5MB). Free memory was 204.4MB in the beginning and 278.6MB in the end (delta: -74.3MB). Peak memory consumption was 9.1MB. Max. memory is 8.0GB. [2022-03-20 09:16:42,829 INFO L158 Benchmark]: Boogie Preprocessor took 35.00ms. Allocated memory is still 307.2MB. Free memory was 278.6MB in the beginning and 277.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:16:42,830 INFO L158 Benchmark]: RCFGBuilder took 278.65ms. Allocated memory is still 307.2MB. Free memory was 277.2MB in the beginning and 266.1MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 09:16:42,830 INFO L158 Benchmark]: IcfgTransformer took 32.63ms. Allocated memory is still 307.2MB. Free memory was 266.1MB in the beginning and 264.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:16:42,830 INFO L158 Benchmark]: TraceAbstraction took 20939.39ms. Allocated memory is still 307.2MB. Free memory was 264.3MB in the beginning and 239.2MB in the end (delta: 25.2MB). Peak memory consumption was 129.0MB. Max. memory is 8.0GB. [2022-03-20 09:16:42,831 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 230.7MB. Free memory is still 189.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 215.87ms. Allocated memory was 230.7MB in the beginning and 307.2MB in the end (delta: 76.5MB). Free memory was 204.4MB in the beginning and 278.6MB in the end (delta: -74.3MB). Peak memory consumption was 9.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.00ms. Allocated memory is still 307.2MB. Free memory was 278.6MB in the beginning and 277.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 278.65ms. Allocated memory is still 307.2MB. Free memory was 277.2MB in the beginning and 266.1MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 32.63ms. Allocated memory is still 307.2MB. Free memory was 266.1MB in the beginning and 264.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 20939.39ms. Allocated memory is still 307.2MB. Free memory was 264.3MB in the beginning and 239.2MB in the end (delta: 25.2MB). Peak memory consumption was 129.0MB. 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: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 20.9s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 194 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 180 mSDsluCounter, 685 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 544 mSDsCounter, 126 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 656 IncrementalHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 126 mSolverCounterUnsat, 141 mSDtfsCounter, 656 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 236 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=5, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 43 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 19 PreInvPairs, 27 NumberOfFragments, 79 HoareAnnotationTreeSize, 19 FomulaSimplifications, 28 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1574 FormulaSimplificationTreeSizeReductionInter, 14.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 225 ConstructedInterpolants, 0 QuantifiedInterpolants, 905 SizeOfPredicates, 21 NumberOfNonLiveVariables, 461 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 51/62 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: 32]: Loop Invariant Derived loop invariant: q + b * a * p == y * x && 1 <= y RESULT: Ultimate proved your program to be correct! [2022-03-20 09:16:42,847 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...