/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 20:05:45,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 20:05:45,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 20:05:45,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 20:05:45,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 20:05:45,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 20:05:45,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 20:05:45,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 20:05:45,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 20:05:45,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 20:05:45,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 20:05:45,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 20:05:45,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 20:05:45,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 20:05:45,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 20:05:45,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 20:05:45,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 20:05:45,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 20:05:45,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 20:05:45,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 20:05:45,673 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 20:05:45,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 20:05:45,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 20:05:45,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 20:05:45,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 20:05:45,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 20:05:45,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 20:05:45,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 20:05:45,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 20:05:45,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 20:05:45,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 20:05:45,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 20:05:45,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 20:05:45,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 20:05:45,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 20:05:45,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 20:05:45,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 20:05:45,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 20:05:45,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 20:05:45,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 20:05:45,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 20:05:45,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 20:05:45,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 20:05:45,688 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 20:05:45,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 20:05:45,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 20:05:45,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 20:05:45,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 20:05:45,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 20:05:45,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 20:05:45,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 20:05:45,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 20:05:45,690 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 20:05:45,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 20:05:45,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 20:05:45,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 20:05:45,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 20:05:45,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 20:05:45,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:05:45,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 20:05:45,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 20:05:45,692 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 20:05:45,692 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 20:05:45,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 20:05:45,692 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 20:05:45,692 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 20:05:45,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 20:05:45,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 20:05:45,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 20:05:45,940 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 20:05:45,942 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 20:05:45,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2022-03-20 20:05:45,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f494de33c/b7103aedc8954b1a91c06952e0742dfe/FLAGc715cac95 [2022-03-20 20:05:46,303 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 20:05:46,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2022-03-20 20:05:46,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f494de33c/b7103aedc8954b1a91c06952e0742dfe/FLAGc715cac95 [2022-03-20 20:05:46,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f494de33c/b7103aedc8954b1a91c06952e0742dfe [2022-03-20 20:05:46,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 20:05:46,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 20:05:46,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 20:05:46,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 20:05:46,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 20:05:46,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396b31c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46, skipping insertion in model container [2022-03-20 20:05:46,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 20:05:46,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 20:05:46,444 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c[576,589] [2022-03-20 20:05:46,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:05:46,473 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 20:05:46,483 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c[576,589] [2022-03-20 20:05:46,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 20:05:46,512 INFO L208 MainTranslator]: Completed translation [2022-03-20 20:05:46,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46 WrapperNode [2022-03-20 20:05:46,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 20:05:46,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 20:05:46,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 20:05:46,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 20:05:46,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 20:05:46,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 20:05:46,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 20:05:46,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 20:05:46,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46" (1/1) ... [2022-03-20 20:05:46,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 20:05:46,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:46,577 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 20:05:46,592 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 20:05:46,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 20:05:46,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 20:05:46,604 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 20:05:46,605 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 20:05:46,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 20:05:46,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 20:05:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 20:05:46,605 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 20:05:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 20:05:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 20:05:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 20:05:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 20:05:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 20:05:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 20:05:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 20:05:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 20:05:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 20:05:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 20:05:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 20:05:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 20:05:46,653 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 20:05:46,654 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 20:05:46,802 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 20:05:46,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 20:05:46,807 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 20:05:46,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:05:46 BoogieIcfgContainer [2022-03-20 20:05:46,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 20:05:46,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 20:05:46,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 20:05:46,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 20:05:46,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:05:46" (1/3) ... [2022-03-20 20:05:46,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c81c67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:05:46, skipping insertion in model container [2022-03-20 20:05:46,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:05:46" (2/3) ... [2022-03-20 20:05:46,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c81c67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:05:46, skipping insertion in model container [2022-03-20 20:05:46,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:05:46" (3/3) ... [2022-03-20 20:05:46,813 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound2.c [2022-03-20 20:05:46,816 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 20:05:46,817 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 20:05:46,843 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 20:05:46,847 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 20:05:46,847 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 20:05:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 20:05:46,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 20:05:46,861 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:46,862 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:05:46,862 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:46,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2022-03-20 20:05:46,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:46,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823472826] [2022-03-20 20:05:46,877 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:46,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 2 times [2022-03-20 20:05:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:46,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73500907] [2022-03-20 20:05:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:05:46,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 20:05:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:05:46,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 20:05:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:05:46,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 20:05:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:05:46,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 20:05:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 20:05:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 20:05:46,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:46,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73500907] [2022-03-20 20:05:46,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73500907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:46,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:46,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:05:46,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823472826] [2022-03-20 20:05:46,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823472826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:46,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:46,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 20:05:46,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738905622] [2022-03-20 20:05:46,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:47,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 20:05:47,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 20:05:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 20:05:47,020 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 20:05:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:47,078 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2022-03-20 20:05:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 20:05:47,080 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 20:05:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:47,085 INFO L225 Difference]: With dead ends: 71 [2022-03-20 20:05:47,085 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 20:05:47,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 20:05:47,089 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:47,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:05:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 20:05:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-20 20:05:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 20:05:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-20 20:05:47,119 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-03-20 20:05:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:47,120 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-20 20:05:47,120 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 20:05:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-20 20:05:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 20:05:47,121 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:47,121 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:05:47,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 20:05:47,121 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:47,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2022-03-20 20:05:47,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:47,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1377123473] [2022-03-20 20:05:47,123 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:47,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 2 times [2022-03-20 20:05:47,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:47,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278899744] [2022-03-20 20:05:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:47,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:47,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:05:47,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862209137] [2022-03-20 20:05:47,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:05:47,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:47,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:47,140 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 20:05:47,172 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 20:05:47,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 20:05:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:05:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 20:05:47,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:05:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 20:05:47,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:05:47,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:47,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278899744] [2022-03-20 20:05:47,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:05:47,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862209137] [2022-03-20 20:05:47,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862209137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:47,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:47,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:05:47,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:47,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1377123473] [2022-03-20 20:05:47,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1377123473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:47,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:47,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:05:47,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267242959] [2022-03-20 20:05:47,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:47,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:05:47,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:47,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:05:47,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:05:47,295 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 20:05:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:47,342 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-20 20:05:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:05:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 20:05:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:47,345 INFO L225 Difference]: With dead ends: 45 [2022-03-20 20:05:47,345 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 20:05:47,345 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:05:47,346 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:47,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:05:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 20:05:47,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-03-20 20:05:47,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 20:05:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-20 20:05:47,354 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2022-03-20 20:05:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:47,355 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-20 20:05:47,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 20:05:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-20 20:05:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 20:05:47,355 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:47,355 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 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 20:05:47,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 20:05:47,574 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 20:05:47,574 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:47,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2022-03-20 20:05:47,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:47,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048594009] [2022-03-20 20:05:47,579 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:47,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 2 times [2022-03-20 20:05:47,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:47,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657087243] [2022-03-20 20:05:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:47,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:47,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:05:47,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236416970] [2022-03-20 20:05:47,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:05:47,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:47,606 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 20:05:47,622 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 20:05:47,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:05:47,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:05:47,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 20:05:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:05:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 20:05:47,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:05:47,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:47,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657087243] [2022-03-20 20:05:47,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:05:47,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236416970] [2022-03-20 20:05:47,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236416970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:47,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:47,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:05:47,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:47,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048594009] [2022-03-20 20:05:47,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048594009] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:47,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:47,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:05:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034225483] [2022-03-20 20:05:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:47,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:05:47,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:05:47,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:05:47,875 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 20:05:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:47,984 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-20 20:05:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:05:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2022-03-20 20:05:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:47,988 INFO L225 Difference]: With dead ends: 57 [2022-03-20 20:05:47,989 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 20:05:47,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:05:47,996 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:47,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 198 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:05:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 20:05:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-20 20:05:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 20:05:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-03-20 20:05:48,005 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2022-03-20 20:05:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:48,006 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-03-20 20:05:48,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 20:05:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-03-20 20:05:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 20:05:48,007 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:48,007 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:05:48,027 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 20:05:48,225 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 20:05:48,226 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:48,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2022-03-20 20:05:48,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:48,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [482166564] [2022-03-20 20:05:48,227 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:48,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 2 times [2022-03-20 20:05:48,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:48,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547067273] [2022-03-20 20:05:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:48,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:48,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:05:48,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098194415] [2022-03-20 20:05:48,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:05:48,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:48,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:48,239 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 20:05:48,241 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 20:05:48,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:05:48,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:05:48,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 20:05:48,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:05:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 20:05:48,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:05:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 20:05:48,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:48,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547067273] [2022-03-20 20:05:48,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:05:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098194415] [2022-03-20 20:05:48,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098194415] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 20:05:48,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:05:48,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 14 [2022-03-20 20:05:48,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [482166564] [2022-03-20 20:05:48,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [482166564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:48,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:48,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:05:48,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650359076] [2022-03-20 20:05:48,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:48,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:05:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:05:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=151, Unknown=1, NotChecked=0, Total=182 [2022-03-20 20:05:48,902 INFO L87 Difference]: Start difference. First operand 53 states and 67 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 20:05:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:48,938 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-03-20 20:05:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 20:05:48,938 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2022-03-20 20:05:48,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:48,939 INFO L225 Difference]: With dead ends: 59 [2022-03-20 20:05:48,939 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 20:05:48,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2022-03-20 20:05:48,940 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:48,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 116 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:05:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 20:05:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 20:05:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 20:05:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2022-03-20 20:05:48,948 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 40 [2022-03-20 20:05:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:48,949 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2022-03-20 20:05:48,949 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-20 20:05:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2022-03-20 20:05:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 20:05:48,950 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:48,950 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2022-03-20 20:05:48,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 20:05:49,169 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 20:05:49,170 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 1 times [2022-03-20 20:05:49,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:49,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1763076371] [2022-03-20 20:05:49,171 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:49,171 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 2 times [2022-03-20 20:05:49,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:49,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596442918] [2022-03-20 20:05:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:49,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:05:49,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855399348] [2022-03-20 20:05:49,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:05:49,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:49,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:49,190 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 20:05:49,191 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 20:05:49,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:05:49,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:05:49,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:05:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:05:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 20:05:49,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:05:49,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:49,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596442918] [2022-03-20 20:05:49,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:05:49,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855399348] [2022-03-20 20:05:49,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855399348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:49,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:49,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:05:49,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1763076371] [2022-03-20 20:05:49,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1763076371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:49,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:49,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:05:49,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445221284] [2022-03-20 20:05:49,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:49,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:05:49,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:49,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:05:49,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 20:05:49,310 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 20:05:49,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:49,376 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-03-20 20:05:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:05:49,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-20 20:05:49,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:49,377 INFO L225 Difference]: With dead ends: 63 [2022-03-20 20:05:49,377 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 20:05:49,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 20:05:49,378 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:49,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 197 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:05:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 20:05:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 20:05:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 20:05:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-03-20 20:05:49,386 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 50 [2022-03-20 20:05:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:49,386 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-03-20 20:05:49,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 20:05:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-03-20 20:05:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 20:05:49,388 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:49,388 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:05:49,406 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 20:05:49,603 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 20:05:49,603 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2022-03-20 20:05:49,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1880394424] [2022-03-20 20:05:49,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 2 times [2022-03-20 20:05:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22190819] [2022-03-20 20:05:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:49,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:49,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:05:49,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808034754] [2022-03-20 20:05:49,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:05:49,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:49,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:49,619 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 20:05:49,635 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 20:05:49,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:05:49,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:05:49,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 20:05:49,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:05:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 20:05:49,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:05:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 20:05:49,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:49,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22190819] [2022-03-20 20:05:49,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:05:49,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808034754] [2022-03-20 20:05:49,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808034754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:05:49,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:05:49,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 20:05:49,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:49,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1880394424] [2022-03-20 20:05:49,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1880394424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:49,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:49,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 20:05:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628442530] [2022-03-20 20:05:49,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:49,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 20:05:49,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:49,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 20:05:49,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:05:49,918 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:05:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:49,997 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-03-20 20:05:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 20:05:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 20:05:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:49,999 INFO L225 Difference]: With dead ends: 67 [2022-03-20 20:05:49,999 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 20:05:50,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-20 20:05:50,002 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:50,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 144 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:05:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 20:05:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 20:05:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 20:05:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-03-20 20:05:50,024 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 56 [2022-03-20 20:05:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:50,024 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-03-20 20:05:50,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 20:05:50,024 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-03-20 20:05:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 20:05:50,027 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:50,027 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 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] [2022-03-20 20:05:50,063 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 20:05:50,243 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 20:05:50,244 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2022-03-20 20:05:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2009273394] [2022-03-20 20:05:50,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:50,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 2 times [2022-03-20 20:05:50,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:50,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938662306] [2022-03-20 20:05:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:50,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:50,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:05:50,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857383783] [2022-03-20 20:05:50,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:05:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:50,272 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:05:50,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 20:05:50,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:05:50,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:05:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 20:05:50,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:05:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 20:05:50,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:05:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 20:05:50,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:50,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938662306] [2022-03-20 20:05:50,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:05:50,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857383783] [2022-03-20 20:05:50,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857383783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:05:50,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:05:50,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-20 20:05:50,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:50,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2009273394] [2022-03-20 20:05:50,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2009273394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:50,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:50,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 20:05:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352288036] [2022-03-20 20:05:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:50,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 20:05:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 20:05:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 20:05:50,554 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:05:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:50,645 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2022-03-20 20:05:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 20:05:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-20 20:05:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:50,647 INFO L225 Difference]: With dead ends: 97 [2022-03-20 20:05:50,647 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 20:05:50,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 20:05:50,648 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:50,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 279 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:05:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 20:05:50,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2022-03-20 20:05:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 20:05:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-03-20 20:05:50,658 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 63 [2022-03-20 20:05:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:50,658 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-03-20 20:05:50,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-20 20:05:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-03-20 20:05:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 20:05:50,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:50,659 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:05:50,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 20:05:50,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:50,878 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2022-03-20 20:05:50,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:50,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [366590724] [2022-03-20 20:05:50,879 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 2 times [2022-03-20 20:05:50,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:50,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620959144] [2022-03-20 20:05:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:50,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:50,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:05:50,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66231374] [2022-03-20 20:05:50,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 20:05:50,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:50,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:50,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:05:50,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 20:05:50,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 20:05:50,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:05:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 20:05:50,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:05:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-03-20 20:05:51,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:05:51,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620959144] [2022-03-20 20:05:51,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:05:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66231374] [2022-03-20 20:05:51,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66231374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 20:05:51,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 20:05:51,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 20:05:51,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [366590724] [2022-03-20 20:05:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [366590724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:51,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:51,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 20:05:51,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138982251] [2022-03-20 20:05:51,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:51,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 20:05:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 20:05:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-20 20:05:51,643 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 20:05:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:51,914 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2022-03-20 20:05:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 20:05:51,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 86 [2022-03-20 20:05:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:51,915 INFO L225 Difference]: With dead ends: 153 [2022-03-20 20:05:51,915 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 20:05:51,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-20 20:05:51,916 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:51,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 268 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 20:05:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 20:05:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-20 20:05:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 64 states have (on average 1.09375) internal successors, (70), 65 states have internal predecessors, (70), 31 states have call successors, (31), 14 states have call predecessors, (31), 13 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 20:05:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2022-03-20 20:05:51,926 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 86 [2022-03-20 20:05:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:51,927 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2022-03-20 20:05:51,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 20:05:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2022-03-20 20:05:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 20:05:51,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:51,928 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:05:51,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 20:05:52,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:52,144 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:52,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 3 times [2022-03-20 20:05:52,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:52,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1859963328] [2022-03-20 20:05:52,145 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 4 times [2022-03-20 20:05:52,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:52,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061751293] [2022-03-20 20:05:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:52,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:52,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:05:52,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350787974] [2022-03-20 20:05:52,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:05:52,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:52,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:52,155 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:05:52,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 20:05:52,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:05:52,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:05:52,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 20:05:52,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:05:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-20 20:05:52,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 20:05:52,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:52,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061751293] [2022-03-20 20:05:52,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:05:52,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350787974] [2022-03-20 20:05:52,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350787974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:52,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:52,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:05:52,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:52,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1859963328] [2022-03-20 20:05:52,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1859963328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:52,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:52,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 20:05:52,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650723515] [2022-03-20 20:05:52,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:52,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 20:05:52,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:52,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 20:05:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 20:05:52,346 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 20:05:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:52,387 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2022-03-20 20:05:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 20:05:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-03-20 20:05:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:52,389 INFO L225 Difference]: With dead ends: 157 [2022-03-20 20:05:52,389 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 20:05:52,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 20:05:52,389 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:52,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 161 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 20:05:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 20:05:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2022-03-20 20:05:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 61 states have internal predecessors, (65), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 20:05:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2022-03-20 20:05:52,398 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 93 [2022-03-20 20:05:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:52,399 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2022-03-20 20:05:52,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 20:05:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2022-03-20 20:05:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 20:05:52,399 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 20:05:52,399 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 20:05:52,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 20:05:52,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 20:05:52,613 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 20:05:52,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 20:05:52,613 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 3 times [2022-03-20 20:05:52,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:52,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309243918] [2022-03-20 20:05:52,614 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 20:05:52,614 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 4 times [2022-03-20 20:05:52,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 20:05:52,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565082282] [2022-03-20 20:05:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 20:05:52,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 20:05:52,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 20:05:52,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657981612] [2022-03-20 20:05:52,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 20:05:52,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 20:05:52,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 20:05:52,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 20:05:52,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 20:05:52,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 20:05:52,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 20:05:52,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 20:05:52,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 20:05:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 93 proven. 11 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-03-20 20:05:52,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 20:05:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-03-20 20:05:53,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 20:05:53,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565082282] [2022-03-20 20:05:53,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 20:05:53,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657981612] [2022-03-20 20:05:53,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657981612] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 20:05:53,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 20:05:53,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-03-20 20:05:53,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 20:05:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [309243918] [2022-03-20 20:05:53,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [309243918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 20:05:53,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 20:05:53,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 20:05:53,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018297915] [2022-03-20 20:05:53,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 20:05:53,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 20:05:53,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 20:05:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 20:05:53,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-20 20:05:53,218 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 20:05:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 20:05:53,327 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2022-03-20 20:05:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 20:05:53,328 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 109 [2022-03-20 20:05:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 20:05:53,328 INFO L225 Difference]: With dead ends: 113 [2022-03-20 20:05:53,328 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 20:05:53,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2022-03-20 20:05:53,330 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 20:05:53,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 194 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 20:05:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 20:05:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 20:05:53,330 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 20:05:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 20:05:53,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2022-03-20 20:05:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 20:05:53,330 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 20:05:53,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-20 20:05:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 20:05:53,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 20:05:53,332 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 20:05:53,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 20:05:53,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 20:05:53,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 20:05:55,015 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-20 20:05:55,015 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-20 20:05:55,015 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-20 20:05:55,015 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-20 20:05:55,015 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 20:05:55,015 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 20:05:55,016 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 20:05:55,016 INFO L885 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: true [2022-03-20 20:05:55,016 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= main_~y~0 2) (<= 0 main_~x~0) (<= 1 main_~y~0) (<= main_~x~0 2)) [2022-03-20 20:05:55,016 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-03-20 20:05:55,016 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 2) (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-03-20 20:05:55,016 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-03-20 20:05:55,016 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-03-20 20:05:55,016 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 66) the Hoare annotation is: true [2022-03-20 20:05:55,016 INFO L878 garLoopResultBuilder]: At program point L50(lines 47 59) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-03-20 20:05:55,016 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-03-20 20:05:55,016 INFO L878 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-03-20 20:05:55,016 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 66) the Hoare annotation is: true [2022-03-20 20:05:55,017 INFO L878 garLoopResultBuilder]: At program point L40(lines 38 62) the Hoare annotation is: (let ((.cse2 (<= 1 main_~y~0)) (.cse0 (<= main_~y~0 2)) (.cse1 (<= 0 main_~x~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and (= main_~x~0 main_~r~0) .cse0 .cse1 (= (mod main_~b~0 2) 0) (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) (= main_~q~0 0) .cse2 .cse3 .cse4) (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse2 .cse3 .cse4) (and (< main_~r~0 main_~y~0) .cse0 .cse1 (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse3 .cse4))) [2022-03-20 20:05:55,017 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 2)) (.cse1 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse2 (<= main_~x~0 2))) (or (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse0 .cse1 .cse2) (and (= main_~x~0 main_~r~0) .cse3 (= main_~b~0 0) (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) (= main_~q~0 0) .cse0 .cse1 .cse2) (and (< main_~r~0 main_~y~0) .cse3 (<= 0 main_~x~0) (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse1 .cse2))) [2022-03-20 20:05:55,017 INFO L878 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 2)) (.cse1 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 (* main_~a~0 main_~y~0)))) (or (and .cse0 (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse1 .cse2) (and (= main_~x~0 main_~r~0) .cse0 (= main_~q~0 0) .cse1) (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse1 .cse2 (<= main_~x~0 2)))) [2022-03-20 20:05:55,017 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2022-03-20 20:05:55,017 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse8 (* main_~a~0 main_~y~0))) (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (<= main_~y~0 2)) (.cse2 (<= (* 2 .cse8) main_~r~0)) (.cse3 (<= 1 main_~r~0)) (.cse4 (= main_~q~0 0)) (.cse5 (<= 1 main_~y~0)) (.cse6 (= main_~b~0 .cse8)) (.cse7 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~b~0 main_~y~0) .cse4 .cse5 .cse6 .cse7) (and .cse0 .cse1 .cse2 (= (mod main_~b~0 2) 0) .cse3 .cse4 .cse5 .cse6 .cse7)))) [2022-03-20 20:05:55,017 INFO L878 garLoopResultBuilder]: At program point L55-1(line 55) the Hoare annotation is: (let ((.cse8 (* main_~a~0 main_~y~0))) (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (<= main_~y~0 2)) (.cse2 (<= (* 2 .cse8) main_~r~0)) (.cse3 (<= 1 main_~r~0)) (.cse4 (= main_~q~0 0)) (.cse5 (<= 1 main_~y~0)) (.cse6 (= main_~b~0 .cse8)) (.cse7 (<= main_~x~0 2))) (or (and .cse0 .cse1 .cse2 .cse3 (= main_~b~0 main_~y~0) .cse4 .cse5 .cse6 .cse7) (and .cse0 .cse1 .cse2 (= (mod main_~b~0 2) 0) .cse3 .cse4 .cse5 .cse6 .cse7)))) [2022-03-20 20:05:55,017 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-03-20 20:05:55,017 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse5 (<= main_~y~0 2)) (.cse6 (<= 1 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= (* main_~y~0 2) main_~r~0) .cse1 (= main_~a~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse5 (= (mod main_~b~0 2) 0) .cse6 (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse5 .cse6 (= main_~b~0 main_~y~0) .cse1 .cse2 .cse3 .cse4))) [2022-03-20 20:05:55,017 INFO L878 garLoopResultBuilder]: At program point L47-3(lines 47 59) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (< main_~r~0 (* main_~b~0 2))) (.cse2 (= main_~q~0 0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and .cse0 (<= main_~y~0 2) .cse1 (<= 1 main_~r~0) (= main_~b~0 main_~y~0) .cse2 .cse3 .cse4) (and .cse0 .cse1 (<= (* main_~y~0 2) main_~r~0) .cse2 (= main_~a~0 2) .cse3 .cse4))) [2022-03-20 20:05:55,018 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 2)) (.cse1 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse2 (<= main_~x~0 2))) (or (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse0 .cse1 .cse2) (and (= main_~x~0 main_~r~0) .cse3 (= main_~b~0 0) (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) (= main_~q~0 0) .cse0 .cse1 .cse2) (and (< main_~r~0 main_~y~0) .cse3 (<= 0 main_~x~0) (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse1 .cse2))) [2022-03-20 20:05:55,018 INFO L878 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse2 (<= 1 main_~y~0)) (.cse0 (<= main_~y~0 2)) (.cse1 (<= 0 main_~x~0)) (.cse3 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse4 (<= main_~x~0 2))) (or (and (= main_~x~0 main_~r~0) .cse0 .cse1 (= (mod main_~b~0 2) 0) (<= (div (* (- 1) main_~b~0) (- 4)) (div main_~r~0 4)) (= main_~q~0 0) .cse2 .cse3 .cse4) (and (= main_~q~0 2) (<= 0 main_~r~0) (= main_~x~0 (+ main_~r~0 (* main_~y~0 2))) .cse2 .cse3 .cse4) (and (< main_~r~0 main_~y~0) .cse0 .cse1 (<= main_~b~0 main_~y~0) (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse3 .cse4))) [2022-03-20 20:05:55,018 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 20:05:55,018 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 20:05:55,018 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 20:05:55,018 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 20:05:55,018 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 20:05:55,018 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 20:05:55,018 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 20:05:55,018 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 20:05:55,018 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 20:05:55,018 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-20 20:05:55,018 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 20:05:55,019 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 20:05:55,019 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 20:05:55,021 INFO L719 BasicCegarLoop]: Path program histogram: [4, 4, 2, 2, 2, 2, 2, 2] [2022-03-20 20:05:55,022 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 20:05:55,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:05:55 BoogieIcfgContainer [2022-03-20 20:05:55,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 20:05:55,032 INFO L158 Benchmark]: Toolchain (without parser) took 8714.19ms. Allocated memory was 173.0MB in the beginning and 278.9MB in the end (delta: 105.9MB). Free memory was 122.2MB in the beginning and 216.6MB in the end (delta: -94.4MB). Peak memory consumption was 107.6MB. Max. memory is 8.0GB. [2022-03-20 20:05:55,032 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 173.0MB. Free memory was 138.5MB in the beginning and 138.5MB in the end (delta: 75.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 20:05:55,032 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.19ms. Allocated memory was 173.0MB in the beginning and 231.7MB in the end (delta: 58.7MB). Free memory was 122.0MB in the beginning and 208.1MB in the end (delta: -86.1MB). Peak memory consumption was 14.0MB. Max. memory is 8.0GB. [2022-03-20 20:05:55,032 INFO L158 Benchmark]: Boogie Preprocessor took 34.07ms. Allocated memory is still 231.7MB. Free memory was 208.1MB in the beginning and 206.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 20:05:55,032 INFO L158 Benchmark]: RCFGBuilder took 260.76ms. Allocated memory is still 231.7MB. Free memory was 206.8MB in the beginning and 195.5MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 20:05:55,033 INFO L158 Benchmark]: TraceAbstraction took 8222.01ms. Allocated memory was 231.7MB in the beginning and 278.9MB in the end (delta: 47.2MB). Free memory was 195.2MB in the beginning and 216.6MB in the end (delta: -21.3MB). Peak memory consumption was 123.0MB. Max. memory is 8.0GB. [2022-03-20 20:05:55,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 173.0MB. Free memory was 138.5MB in the beginning and 138.5MB in the end (delta: 75.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.19ms. Allocated memory was 173.0MB in the beginning and 231.7MB in the end (delta: 58.7MB). Free memory was 122.0MB in the beginning and 208.1MB in the end (delta: -86.1MB). Peak memory consumption was 14.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.07ms. Allocated memory is still 231.7MB. Free memory was 208.1MB in the beginning and 206.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 260.76ms. Allocated memory is still 231.7MB. Free memory was 206.8MB in the beginning and 195.5MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 8222.01ms. Allocated memory was 231.7MB in the beginning and 278.9MB in the end (delta: 47.2MB). Free memory was 195.2MB in the beginning and 216.6MB in the end (delta: -21.3MB). Peak memory consumption was 123.0MB. 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: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.2s, OverallIterations: 10, TraceHistogramMax: 15, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 245 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 190 mSDsluCounter, 1751 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1350 mSDsCounter, 135 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1047 IncrementalHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 135 mSolverCounterUnsat, 401 mSDtfsCounter, 1047 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 904 GetRequests, 796 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=8, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 14 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 397 PreInvPairs, 514 NumberOfFragments, 1192 HoareAnnotationTreeSize, 397 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 39 FomulaSimplificationsInter, 1318 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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: 47]: Loop Invariant Derived loop invariant: (((((((x == r && y * 2 <= r) && q == 0) && a == 2) && 1 <= y) && b == a * y) && x <= 2) || ((((((((x == r && y <= 2) && b % 2 == 0) && 1 <= r) && -1 * b / -4 <= r / 4) && q == 0) && 1 <= y) && b == a * y) && x <= 2)) || (((((((x == r && y <= 2) && 1 <= r) && b == y) && q == 0) && 1 <= y) && b == a * y) && x <= 2) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((((q == 2 && 0 <= r) && x == r + y * 2) && 1 <= y) && b == a * y) && x <= 2) || (((((((x == r && y <= 2) && b == 0) && -1 * b / -4 <= r / 4) && q == 0) && 1 <= y) && b == a * y) && x <= 2)) || (((((((r < y && y <= 2) && 0 <= x) && b <= y) && x == y + r) && q == 1) && b == a * y) && x <= 2) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-20 20:05:55,062 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...