/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/divbin2_unwindbound1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 09:55:41,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 09:55:41,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 09:55:41,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 09:55:41,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 09:55:41,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 09:55:41,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 09:55:41,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 09:55:41,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 09:55:41,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 09:55:41,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 09:55:41,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 09:55:41,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 09:55:41,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 09:55:41,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 09:55:41,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 09:55:41,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 09:55:41,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 09:55:41,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 09:55:41,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 09:55:41,114 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 09:55:41,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 09:55:41,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 09:55:41,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 09:55:41,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 09:55:41,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 09:55:41,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 09:55:41,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 09:55:41,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 09:55:41,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 09:55:41,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 09:55:41,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 09:55:41,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 09:55:41,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 09:55:41,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 09:55:41,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 09:55:41,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 09:55:41,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 09:55:41,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 09:55:41,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 09:55:41,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 09:55:41,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 09:55:41,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 09:55:41,151 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 09:55:41,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 09:55:41,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 09:55:41,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 09:55:41,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 09:55:41,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 09:55:41,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 09:55:41,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 09:55:41,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 09:55:41,156 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 09:55:41,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 09:55:41,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 09:55:41,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 09:55:41,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 09:55:41,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 09:55:41,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:55:41,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 09:55:41,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 09:55:41,158 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 09:55:41,158 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 09:55:41,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 09:55:41,158 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 09:55:41,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 09:55:41,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 09:55:41,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 09:55:41,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 09:55:41,388 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 09:55:41,389 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 09:55:41,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound1.i [2022-03-19 09:55:41,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e8e375c/fe185d5c0e1a42faa2f06b2cf9a6922c/FLAG591b7876c [2022-03-19 09:55:41,806 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 09:55:41,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound1.i [2022-03-19 09:55:41,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e8e375c/fe185d5c0e1a42faa2f06b2cf9a6922c/FLAG591b7876c [2022-03-19 09:55:42,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e8e375c/fe185d5c0e1a42faa2f06b2cf9a6922c [2022-03-19 09:55:42,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 09:55:42,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 09:55:42,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 09:55:42,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 09:55:42,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 09:55:42,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69567b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42, skipping insertion in model container [2022-03-19 09:55:42,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 09:55:42,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 09:55:42,408 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/divbin2_unwindbound1.i[951,964] [2022-03-19 09:55:42,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:55:42,427 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 09:55:42,435 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/divbin2_unwindbound1.i[951,964] [2022-03-19 09:55:42,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:55:42,451 INFO L208 MainTranslator]: Completed translation [2022-03-19 09:55:42,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42 WrapperNode [2022-03-19 09:55:42,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 09:55:42,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 09:55:42,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 09:55:42,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 09:55:42,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 09:55:42,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 09:55:42,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 09:55:42,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 09:55:42,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42" (1/1) ... [2022-03-19 09:55:42,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:55:42,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:55:42,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 09:55:42,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 09:55:42,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 09:55:42,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 09:55:42,538 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 09:55:42,539 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 09:55:42,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 09:55:42,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 09:55:42,540 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 09:55:42,540 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 09:55:42,540 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 09:55:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 09:55:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 09:55:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 09:55:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 09:55:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 09:55:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 09:55:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 09:55:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 09:55:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 09:55:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 09:55:42,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 09:55:42,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 09:55:42,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 09:55:42,602 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 09:55:42,604 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 09:55:42,767 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 09:55:42,773 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 09:55:42,773 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 09:55:42,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:55:42 BoogieIcfgContainer [2022-03-19 09:55:42,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 09:55:42,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 09:55:42,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 09:55:42,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 09:55:42,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 09:55:42" (1/3) ... [2022-03-19 09:55:42,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d2e92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:55:42, skipping insertion in model container [2022-03-19 09:55:42,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:55:42" (2/3) ... [2022-03-19 09:55:42,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d2e92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:55:42, skipping insertion in model container [2022-03-19 09:55:42,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:55:42" (3/3) ... [2022-03-19 09:55:42,798 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound1.i [2022-03-19 09:55:42,807 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 09:55:42,807 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 09:55:42,879 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 09:55:42,885 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 [2022-03-19 09:55:42,886 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 09:55:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 09:55:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 09:55:42,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:55:42,925 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:55:42,926 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:55:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:55:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2022-03-19 09:55:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:42,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356520179] [2022-03-19 09:55:42,947 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:55:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 2 times [2022-03-19 09:55:42,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:55:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36016408] [2022-03-19 09:55:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:42,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:55:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:55:43,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 09:55:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:55:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:55:43,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:55:43,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36016408] [2022-03-19 09:55:43,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36016408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:43,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:43,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:55:43,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:55:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356520179] [2022-03-19 09:55:43,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356520179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:43,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:43,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:55:43,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704591569] [2022-03-19 09:55:43,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:55:43,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 09:55:43,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:43,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 09:55:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 09:55:43,180 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:55:43,271 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-03-19 09:55:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 09:55:43,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 09:55:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:55:43,283 INFO L225 Difference]: With dead ends: 44 [2022-03-19 09:55:43,283 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 09:55:43,286 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 09:55:43,290 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:55:43,291 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:55:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 09:55:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-19 09:55:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 09:55:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-03-19 09:55:43,339 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-03-19 09:55:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:55:43,339 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-03-19 09:55:43,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-03-19 09:55:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 09:55:43,340 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:55:43,340 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:55:43,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 09:55:43,341 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:55:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:55:43,342 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2022-03-19 09:55:43,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:43,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2084286840] [2022-03-19 09:55:43,343 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:55:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 2 times [2022-03-19 09:55:43,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:55:43,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514590635] [2022-03-19 09:55:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:55:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:55:43,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 09:55:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:55:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:55:43,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:55:43,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514590635] [2022-03-19 09:55:43,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514590635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:43,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:43,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 09:55:43,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:55:43,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2084286840] [2022-03-19 09:55:43,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2084286840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:43,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:43,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 09:55:43,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251380180] [2022-03-19 09:55:43,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:55:43,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 09:55:43,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:43,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 09:55:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 09:55:43,424 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:55:43,480 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-03-19 09:55:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 09:55:43,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 09:55:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:55:43,485 INFO L225 Difference]: With dead ends: 35 [2022-03-19 09:55:43,486 INFO L226 Difference]: Without dead ends: 23 [2022-03-19 09:55:43,489 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:55:43,493 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:55:43,498 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:55:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-19 09:55:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-19 09:55:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 09:55:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-03-19 09:55:43,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2022-03-19 09:55:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:55:43,506 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-03-19 09:55:43,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-03-19 09:55:43,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 09:55:43,509 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:55:43,509 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:55:43,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 09:55:43,510 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:55:43,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:55:43,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2022-03-19 09:55:43,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:43,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [661735185] [2022-03-19 09:55:43,522 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:55:43,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 2 times [2022-03-19 09:55:43,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:55:43,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624439649] [2022-03-19 09:55:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:43,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:55:43,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:55:43,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492254828] [2022-03-19 09:55:43,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:55:43,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:43,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:55:43,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:55:43,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 09:55:43,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 09:55:43,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:55:43,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 09:55:43,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:55:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:55:43,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:55:43,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:55:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624439649] [2022-03-19 09:55:43,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:55:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492254828] [2022-03-19 09:55:43,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492254828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:43,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:43,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:55:43,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:55:43,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [661735185] [2022-03-19 09:55:43,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [661735185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:43,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:43,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:55:43,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482726310] [2022-03-19 09:55:43,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:55:43,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 09:55:43,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:43,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 09:55:43,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:55:43,958 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:55:44,038 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-03-19 09:55:44,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 09:55:44,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 09:55:44,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:55:44,041 INFO L225 Difference]: With dead ends: 35 [2022-03-19 09:55:44,041 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 09:55:44,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-19 09:55:44,046 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:55:44,056 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:55:44,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 09:55:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 09:55:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 09:55:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-03-19 09:55:44,064 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-03-19 09:55:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:55:44,064 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-03-19 09:55:44,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-03-19 09:55:44,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 09:55:44,065 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:55:44,065 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:55:44,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 09:55:44,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:44,266 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:55:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:55:44,267 INFO L85 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2022-03-19 09:55:44,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:44,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [601672087] [2022-03-19 09:55:44,529 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 09:55:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1104810099, now seen corresponding path program 1 times [2022-03-19 09:55:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:55:44,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863564939] [2022-03-19 09:55:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:44,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:55:44,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:55:44,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774109769] [2022-03-19 09:55:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:44,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:55:44,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:55:44,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 09:55:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:55:44,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 09:55:44,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:55:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:55:44,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:55:44,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:55:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863564939] [2022-03-19 09:55:44,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:55:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774109769] [2022-03-19 09:55:44,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774109769] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:44,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:44,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:55:44,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:55:44,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [601672087] [2022-03-19 09:55:44,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [601672087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:44,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:44,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 09:55:44,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588146981] [2022-03-19 09:55:44,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:55:44,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 09:55:44,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:44,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 09:55:44,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 09:55:44,719 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:55:44,760 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-03-19 09:55:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 09:55:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 09:55:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:55:44,761 INFO L225 Difference]: With dead ends: 46 [2022-03-19 09:55:44,761 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 09:55:44,762 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 09:55:44,762 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:55:44,763 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:55:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 09:55:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 09:55:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 09:55:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-03-19 09:55:44,770 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2022-03-19 09:55:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:55:44,770 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-03-19 09:55:44,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-03-19 09:55:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 09:55:44,771 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:55:44,771 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:55:44,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 09:55:44,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 09:55:44,992 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:55:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:55:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1615882355, now seen corresponding path program 1 times [2022-03-19 09:55:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:44,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [199558473] [2022-03-19 09:55:45,260 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 09:55:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash -152059465, now seen corresponding path program 1 times [2022-03-19 09:55:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:55:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818351516] [2022-03-19 09:55:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:45,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:55:45,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:55:45,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890247630] [2022-03-19 09:55:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:45,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:45,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:55:45,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:55:45,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 09:55:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:55:45,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 09:55:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:55:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:55:45,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:55:45,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:55:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818351516] [2022-03-19 09:55:45,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:55:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890247630] [2022-03-19 09:55:45,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890247630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:45,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:45,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:55:45,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:55:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [199558473] [2022-03-19 09:55:45,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [199558473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:45,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:45,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 09:55:45,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402743840] [2022-03-19 09:55:45,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:55:45,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 09:55:45,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 09:55:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-19 09:55:45,553 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:55:45,702 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-03-19 09:55:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 09:55:45,702 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-19 09:55:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:55:45,703 INFO L225 Difference]: With dead ends: 46 [2022-03-19 09:55:45,703 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 09:55:45,703 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 09:55:45,704 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:55:45,704 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 98 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:55:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 09:55:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-03-19 09:55:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 09:55:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-03-19 09:55:45,712 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 18 [2022-03-19 09:55:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:55:45,712 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-03-19 09:55:45,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-03-19 09:55:45,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 09:55:45,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:55:45,716 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:55:45,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 09:55:45,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:45,928 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:55:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:55:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash 68001784, now seen corresponding path program 2 times [2022-03-19 09:55:45,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:45,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [101337745] [2022-03-19 09:55:46,108 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 09:55:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash 846233587, now seen corresponding path program 1 times [2022-03-19 09:55:46,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:55:46,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827416931] [2022-03-19 09:55:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:46,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:55:46,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:55:46,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749182233] [2022-03-19 09:55:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:46,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:46,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:55:46,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:55:46,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 09:55:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:55:46,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 09:55:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:55:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:55:46,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:55:46,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:55:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827416931] [2022-03-19 09:55:46,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:55:46,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749182233] [2022-03-19 09:55:46,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749182233] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:46,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:46,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:55:46,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:55:46,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [101337745] [2022-03-19 09:55:46,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [101337745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:46,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:46,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 09:55:46,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510353520] [2022-03-19 09:55:46,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:55:46,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 09:55:46,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:46,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 09:55:46,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 09:55:46,321 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:55:46,416 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2022-03-19 09:55:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 09:55:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-19 09:55:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:55:46,419 INFO L225 Difference]: With dead ends: 50 [2022-03-19 09:55:46,419 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 09:55:46,419 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 09:55:46,422 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:55:46,422 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:55:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 09:55:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-19 09:55:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 09:55:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-03-19 09:55:46,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 20 [2022-03-19 09:55:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:55:46,441 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-03-19 09:55:46,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-03-19 09:55:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 09:55:46,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:55:46,443 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:55:46,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 09:55:46,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:46,668 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:55:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:55:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1779589778, now seen corresponding path program 2 times [2022-03-19 09:55:46,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:46,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853240954] [2022-03-19 09:55:46,843 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-19 09:55:46,844 INFO L85 PathProgramCache]: Analyzing trace with hash 422003255, now seen corresponding path program 1 times [2022-03-19 09:55:46,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:55:46,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008752746] [2022-03-19 09:55:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:46,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:55:46,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:55:46,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892640522] [2022-03-19 09:55:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:46,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:55:46,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:55:46,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 09:55:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:55:46,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 09:55:46,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:55:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 09:55:46,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:55:46,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:55:46,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008752746] [2022-03-19 09:55:46,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:55:46,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892640522] [2022-03-19 09:55:46,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892640522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:46,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:46,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:55:47,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:55:47,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853240954] [2022-03-19 09:55:47,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853240954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:47,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:47,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 09:55:47,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315780981] [2022-03-19 09:55:47,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:55:47,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 09:55:47,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 09:55:47,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-19 09:55:47,102 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:47,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:55:47,265 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-03-19 09:55:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 09:55:47,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 09:55:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:55:47,267 INFO L225 Difference]: With dead ends: 51 [2022-03-19 09:55:47,267 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 09:55:47,267 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-19 09:55:47,268 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:55:47,268 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 89 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:55:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 09:55:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-03-19 09:55:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 09:55:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-03-19 09:55:47,276 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 21 [2022-03-19 09:55:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:55:47,277 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-03-19 09:55:47,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 09:55:47,277 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-03-19 09:55:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-19 09:55:47,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:55:47,278 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:55:47,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 09:55:47,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:47,495 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:55:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:55:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008211, now seen corresponding path program 1 times [2022-03-19 09:55:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:47,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572551376] [2022-03-19 09:55:47,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 09:55:47,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008211, now seen corresponding path program 2 times [2022-03-19 09:55:47,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:55:47,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049482439] [2022-03-19 09:55:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:55:47,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:55:47,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:55:47,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793634927] [2022-03-19 09:55:47,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:55:47,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:55:47,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:55:47,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 09:55:47,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:55:47,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:55:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 09:55:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:55:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 09:55:47,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:55:47,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:55:47,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049482439] [2022-03-19 09:55:47,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:55:47,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793634927] [2022-03-19 09:55:47,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793634927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:47,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:47,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:55:47,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:55:47,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572551376] [2022-03-19 09:55:47,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572551376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:55:47,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:55:47,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:55:47,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307599105] [2022-03-19 09:55:47,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:55:47,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 09:55:47,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:55:47,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 09:55:47,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 09:55:47,620 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 09:55:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:55:47,635 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-03-19 09:55:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 09:55:47,636 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-19 09:55:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:55:47,636 INFO L225 Difference]: With dead ends: 40 [2022-03-19 09:55:47,636 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 09:55:47,637 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:55:47,637 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:55:47,638 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:55:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 09:55:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 09:55:47,638 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) [2022-03-19 09:55:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 09:55:47,639 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-03-19 09:55:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:55:47,639 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 09:55:47,639 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 09:55:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 09:55:47,639 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 09:55:47,641 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 09:55:47,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 09:55:47,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:55:47,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 09:55:48,264 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-03-19 09:55:48,264 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-03-19 09:55:48,264 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-03-19 09:55:48,264 INFO L882 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2022-03-19 09:55:48,264 INFO L882 garLoopResultBuilder]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2022-03-19 09:55:48,265 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 15 17) no Hoare annotation was computed. [2022-03-19 09:55:48,265 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2022-03-19 09:55:48,265 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 26 50) the Hoare annotation is: true [2022-03-19 09:55:48,265 INFO L885 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: true [2022-03-19 09:55:48,265 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 26 50) the Hoare annotation is: true [2022-03-19 09:55:48,265 INFO L878 garLoopResultBuilder]: At program point L38(lines 38 47) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= 1 ~counter~0) (= main_~q~0 0) (<= 1 |main_#t~post3|)) (not (<= 0 |old(~counter~0)|))) [2022-03-19 09:55:48,265 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 47) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (= main_~q~0 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-19 09:55:48,265 INFO L878 garLoopResultBuilder]: At program point L34-1(lines 34 37) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= ~counter~0 (+ |main_#t~post2| 1))) (.cse2 (<= 1 ~counter~0)) (.cse3 (= main_~q~0 0))) (or (and .cse0 .cse1 (= (mod main_~b~0 2) 0) .cse2 (<= (mod (div main_~b~0 2) 4294967296) (mod main_~r~0 4294967296)) (< |main_#t~post2| 2) .cse3) (not (<= |old(~counter~0)| 0)) (and (= main_~b~0 1) (<= |main_#t~post2| 0) .cse0 .cse1 .cse2 .cse3) (not (<= 0 |old(~counter~0)|)))) [2022-03-19 09:55:48,266 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse2 (mod main_~r~0 4294967296)) (.cse1 (<= 1 ~counter~0)) (.cse3 (= main_~q~0 0))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~b~0 2) .cse0 (<= ~counter~0 1) .cse1 (<= (mod (div main_~b~0 2) 4294967296) .cse2) .cse3) (and (= main_~b~0 1) .cse0 (<= 0 ~counter~0) (<= ~counter~0 0) .cse3) (let ((.cse4 (div (- main_~b~0) (- 2)))) (and (= (mod .cse4 2) 0) .cse0 (< ~counter~0 2) (<= (mod .cse4 4294967296) .cse2) (<= (mod (div .cse4 2) 4294967296) .cse2) (= (mod main_~b~0 2) 0) .cse1 .cse3)) (not (<= 0 |old(~counter~0)|)))) [2022-03-19 09:55:48,266 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 26 50) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 0 ~counter~0) (<= ~counter~0 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-19 09:55:48,266 INFO L878 garLoopResultBuilder]: At program point L43(lines 43 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-19 09:55:48,266 INFO L878 garLoopResultBuilder]: At program point L43-2(lines 26 50) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= 1 ~counter~0) (= main_~q~0 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-19 09:55:48,266 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-19 09:55:48,266 INFO L878 garLoopResultBuilder]: At program point L39-1(lines 38 47) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-19 09:55:48,266 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (<= 1 ~counter~0)) (.cse2 (= main_~q~0 0))) (or (and .cse0 (< ~counter~0 2) (= (mod main_~b~0 2) 0) .cse1 (<= (mod (div main_~b~0 2) 4294967296) (mod main_~r~0 4294967296)) .cse2) (and (= main_~b~0 1) .cse0 (<= ~counter~0 1) .cse1 .cse2) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)))) [2022-03-19 09:55:48,266 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-03-19 09:55:48,266 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-19 09:55:48,267 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-03-19 09:55:48,267 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-19 09:55:48,267 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-03-19 09:55:48,267 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 09:55:48,267 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-19 09:55:48,267 INFO L885 garLoopResultBuilder]: At program point L19-2(lines 18 24) the Hoare annotation is: true [2022-03-19 09:55:48,267 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2022-03-19 09:55:48,267 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 18 24) the Hoare annotation is: true [2022-03-19 09:55:48,267 INFO L878 garLoopResultBuilder]: At program point L20(lines 20 21) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 09:55:48,267 INFO L878 garLoopResultBuilder]: At program point L19(lines 19 22) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-03-19 09:55:48,268 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 09:55:48,270 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-19 09:55:48,271 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 09:55:48,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 09:55:48 BoogieIcfgContainer [2022-03-19 09:55:48,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 09:55:48,285 INFO L158 Benchmark]: Toolchain (without parser) took 6050.90ms. Allocated memory was 174.1MB in the beginning and 221.2MB in the end (delta: 47.2MB). Free memory was 123.3MB in the beginning and 113.2MB in the end (delta: 10.1MB). Peak memory consumption was 58.9MB. Max. memory is 8.0GB. [2022-03-19 09:55:48,285 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 174.1MB. Free memory was 140.1MB in the beginning and 140.1MB in the end (delta: 79.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 09:55:48,285 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.44ms. Allocated memory is still 174.1MB. Free memory was 123.1MB in the beginning and 151.0MB in the end (delta: -27.9MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-03-19 09:55:48,286 INFO L158 Benchmark]: Boogie Preprocessor took 24.57ms. Allocated memory is still 174.1MB. Free memory was 151.0MB in the beginning and 149.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 09:55:48,286 INFO L158 Benchmark]: RCFGBuilder took 297.80ms. Allocated memory is still 174.1MB. Free memory was 149.3MB in the beginning and 139.0MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-19 09:55:48,286 INFO L158 Benchmark]: TraceAbstraction took 5507.64ms. Allocated memory was 174.1MB in the beginning and 221.2MB in the end (delta: 47.2MB). Free memory was 138.5MB in the beginning and 113.2MB in the end (delta: 25.4MB). Peak memory consumption was 73.6MB. Max. memory is 8.0GB. [2022-03-19 09:55:48,287 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 174.1MB. Free memory was 140.1MB in the beginning and 140.1MB in the end (delta: 79.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 216.44ms. Allocated memory is still 174.1MB. Free memory was 123.1MB in the beginning and 151.0MB in the end (delta: -27.9MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.57ms. Allocated memory is still 174.1MB. Free memory was 151.0MB in the beginning and 149.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 297.80ms. Allocated memory is still 174.1MB. Free memory was 149.3MB in the beginning and 139.0MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 5507.64ms. Allocated memory was 174.1MB in the beginning and 221.2MB in the end (delta: 47.2MB). Free memory was 138.5MB in the beginning and 113.2MB in the end (delta: 25.4MB). Peak memory consumption was 73.6MB. 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: 21]: 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, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.4s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 63 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 60 mSDsluCounter, 580 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 420 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 433 IncrementalHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 160 mSDtfsCounter, 433 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=7, InterpolantAutomatonStates: 58, 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, 8 MinimizatonAttempts, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 26 LocationsWithAnnotation, 104 PreInvPairs, 141 NumberOfFragments, 368 HoareAnnotationTreeSize, 104 FomulaSimplifications, 118 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 26 FomulaSimplificationsInter, 402 FormulaSimplificationTreeSizeReductionInter, 0.3s 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: 34]: Loop Invariant Derived loop invariant: (((!(\old(counter) <= 0) || (((((b == 2 && A == r) && counter <= 1) && 1 <= counter) && b / 2 % 4294967296 <= r % 4294967296) && q == 0)) || ((((b == 1 && A == r) && 0 <= counter) && counter <= 0) && q == 0)) || (((((((-b / -2 % 2 == 0 && A == r) && counter < 2) && -b / -2 % 4294967296 <= r % 4294967296) && -b / -2 / 2 % 4294967296 <= r % 4294967296) && b % 2 == 0) && 1 <= counter) && q == 0)) || !(0 <= \old(counter)) - ProcedureContractResult [Line: 26]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 18]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-03-19 09:55:48,307 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...