/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/lcm1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:30:16,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:30:16,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:30:16,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 19:30:16,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 19:30:16,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 19:30:16,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 19:30:16,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 19:30:16,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 19:30:16,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 19:30:16,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 19:30:16,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 19:30:16,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 19:30:16,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 19:30:16,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 19:30:16,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 19:30:16,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 19:30:16,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 19:30:16,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 19:30:16,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 19:30:16,224 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 19:30:16,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 19:30:16,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 19:30:16,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 19:30:16,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 19:30:16,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 19:30:16,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 19:30:16,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 19:30:16,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 19:30:16,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 19:30:16,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 19:30:16,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 19:30:16,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 19:30:16,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 19:30:16,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 19:30:16,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 19:30:16,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 19:30:16,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 19:30:16,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 19:30:16,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:30:16,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:30:16,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:30:16,238 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:30:16,245 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:30:16,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:30:16,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:30:16,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:30:16,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:30:16,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:30:16,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:30:16,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:30:16,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:30:16,248 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:30:16,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:30:16,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:30:16,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:30:16,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:30:16,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:30:16,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:30:16,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:30:16,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:30:16,249 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:30:16,249 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:30:16,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:30:16,250 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:30:16,250 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:30:16,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:30:16,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:30:16,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:30:16,450 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:30:16,451 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:30:16,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm1.c [2022-03-20 19:30:16,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab2076eaf/678f57babd38421cbffed25c92fbcbab/FLAGf7d47f93c [2022-03-20 19:30:16,837 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:30:16,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm1.c [2022-03-20 19:30:16,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab2076eaf/678f57babd38421cbffed25c92fbcbab/FLAGf7d47f93c [2022-03-20 19:30:16,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab2076eaf/678f57babd38421cbffed25c92fbcbab [2022-03-20 19:30:16,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:30:16,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:30:16,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:30:16,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:30:16,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:30:16,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:30:16" (1/1) ... [2022-03-20 19:30:16,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7941d510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:16, skipping insertion in model container [2022-03-20 19:30:16,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:30:16" (1/1) ... [2022-03-20 19:30:16,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:30:16,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:30:16,988 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/lcm1.c[552,565] [2022-03-20 19:30:17,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:30:17,013 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:30:17,021 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/lcm1.c[552,565] [2022-03-20 19:30:17,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:30:17,035 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:30:17,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17 WrapperNode [2022-03-20 19:30:17,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:30:17,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:30:17,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:30:17,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:30:17,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17" (1/1) ... [2022-03-20 19:30:17,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17" (1/1) ... [2022-03-20 19:30:17,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17" (1/1) ... [2022-03-20 19:30:17,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17" (1/1) ... [2022-03-20 19:30:17,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17" (1/1) ... [2022-03-20 19:30:17,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17" (1/1) ... [2022-03-20 19:30:17,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17" (1/1) ... [2022-03-20 19:30:17,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:30:17,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:30:17,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:30:17,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:30:17,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17" (1/1) ... [2022-03-20 19:30:17,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:30:17,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:30:17,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 19:30:17,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 19:30:17,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:30:17,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:30:17,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:30:17,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 19:30:17,133 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:30:17,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:30:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 19:30:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:30:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:30:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:30:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 19:30:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 19:30:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:30:17,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:30:17,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:30:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:30:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:30:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:30:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:30:17,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:30:17,185 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:30:17,186 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:30:17,281 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:30:17,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:30:17,285 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 19:30:17,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:30:17 BoogieIcfgContainer [2022-03-20 19:30:17,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:30:17,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:30:17,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:30:17,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:30:17,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:30:16" (1/3) ... [2022-03-20 19:30:17,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18735dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:30:17, skipping insertion in model container [2022-03-20 19:30:17,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:30:17" (2/3) ... [2022-03-20 19:30:17,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18735dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:30:17, skipping insertion in model container [2022-03-20 19:30:17,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:30:17" (3/3) ... [2022-03-20 19:30:17,292 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1.c [2022-03-20 19:30:17,295 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:30:17,296 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:30:17,345 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:30:17,354 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 19:30:17,354 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:30:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 19:30:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 19:30:17,369 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:30:17,369 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:30:17,370 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:30:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:30:17,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1751682979, now seen corresponding path program 1 times [2022-03-20 19:30:17,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:17,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2114304212] [2022-03-20 19:30:17,385 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:30:17,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1751682979, now seen corresponding path program 2 times [2022-03-20 19:30:17,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:30:17,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285572226] [2022-03-20 19:30:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:30:17,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:30:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:30:17,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:30:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:30:17,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:30:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:30:17,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:30:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:30:17,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 19:30:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:30:17,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 19:30:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:30:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 19:30:17,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:30:17,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285572226] [2022-03-20 19:30:17,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285572226] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:17,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:17,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:30:17,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:30:17,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2114304212] [2022-03-20 19:30:17,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2114304212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:17,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:17,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:30:17,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389016100] [2022-03-20 19:30:17,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:30:17,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 19:30:17,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:17,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 19:30:17,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:30:17,562 INFO L87 Difference]: Start difference. First operand has 37 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:30:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:30:17,622 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-03-20 19:30:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 19:30:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 19:30:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:30:17,629 INFO L225 Difference]: With dead ends: 67 [2022-03-20 19:30:17,629 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 19:30:17,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:30:17,634 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:30:17,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:30:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 19:30:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 19:30:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 19:30:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 19:30:17,663 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2022-03-20 19:30:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:30:17,664 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 19:30:17,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:30:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 19:30:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 19:30:17,665 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:30:17,666 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:30:17,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:30:17,666 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:30:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:30:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash -442223298, now seen corresponding path program 1 times [2022-03-20 19:30:17,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:17,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1857120790] [2022-03-20 19:30:17,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:30:17,668 INFO L85 PathProgramCache]: Analyzing trace with hash -442223298, now seen corresponding path program 2 times [2022-03-20 19:30:17,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:30:17,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592265064] [2022-03-20 19:30:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:30:17,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:30:17,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:30:17,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348223783] [2022-03-20 19:30:17,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:30:17,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:30:17,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:30:17,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:30:17,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 19:30:17,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 19:30:17,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:30:17,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 19:30:17,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:30:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 19:30:17,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:30:17,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:30:17,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592265064] [2022-03-20 19:30:17,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:30:17,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348223783] [2022-03-20 19:30:17,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348223783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:17,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:17,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:30:17,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:30:17,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1857120790] [2022-03-20 19:30:17,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1857120790] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:17,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:17,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:30:17,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513603876] [2022-03-20 19:30:17,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:30:17,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:30:17,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:17,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:30:17,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:30:17,922 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 19:30:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:30:17,996 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-03-20 19:30:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:30:17,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2022-03-20 19:30:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:30:17,999 INFO L225 Difference]: With dead ends: 49 [2022-03-20 19:30:17,999 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 19:30:18,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:30:18,001 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:30:18,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 128 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:30:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 19:30:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-03-20 19:30:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 19:30:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-03-20 19:30:18,026 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 32 [2022-03-20 19:30:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:30:18,027 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-03-20 19:30:18,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 19:30:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-03-20 19:30:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 19:30:18,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:30:18,029 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:30:18,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 19:30:18,245 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:30:18,246 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:30:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:30:18,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1300584321, now seen corresponding path program 1 times [2022-03-20 19:30:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:18,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1404919572] [2022-03-20 19:30:18,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:30:18,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1300584321, now seen corresponding path program 2 times [2022-03-20 19:30:18,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:30:18,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774269213] [2022-03-20 19:30:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:30:18,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:30:18,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:30:18,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464945732] [2022-03-20 19:30:18,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:30:18,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:30:18,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:30:18,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:30:18,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process