/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 13:50:16,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 13:50:16,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 13:50:16,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 13:50:16,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 13:50:16,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 13:50:16,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 13:50:16,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 13:50:16,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 13:50:16,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 13:50:16,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 13:50:16,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 13:50:16,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 13:50:16,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 13:50:16,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 13:50:16,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 13:50:16,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 13:50:16,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 13:50:16,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 13:50:16,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 13:50:16,344 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 13:50:16,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 13:50:16,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 13:50:16,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 13:50:16,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 13:50:16,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 13:50:16,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 13:50:16,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 13:50:16,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 13:50:16,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 13:50:16,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 13:50:16,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 13:50:16,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 13:50:16,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 13:50:16,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 13:50:16,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 13:50:16,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 13:50:16,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 13:50:16,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 13:50:16,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 13:50:16,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 13:50:16,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 13:50:16,354 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 13:50:16,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 13:50:16,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 13:50:16,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 13:50:16,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 13:50:16,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 13:50:16,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 13:50:16,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 13:50:16,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 13:50:16,368 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 13:50:16,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 13:50:16,369 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 13:50:16,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 13:50:16,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 13:50:16,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 13:50:16,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 13:50:16,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 13:50:16,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 13:50:16,370 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 13:50:16,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 13:50:16,370 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 13:50:16,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 13:50:16,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 13:50:16,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 13:50:16,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 13:50:16,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 13:50:16,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 13:50:16,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 13:50:16,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 13:50:16,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 13:50:16,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 13:50:16,371 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 13:50:16,371 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 13:50:16,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 13:50:16,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 13:50:16,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 13:50:16,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 13:50:16,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 13:50:16,534 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 13:50:16,534 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 13:50:16,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound10.i [2022-03-18 13:50:16,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7df93d36c/9361db2071134c94b913b6c1e94d2a73/FLAG320ca83b2 [2022-03-18 13:50:16,941 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 13:50:16,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound10.i [2022-03-18 13:50:16,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7df93d36c/9361db2071134c94b913b6c1e94d2a73/FLAG320ca83b2 [2022-03-18 13:50:16,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7df93d36c/9361db2071134c94b913b6c1e94d2a73 [2022-03-18 13:50:16,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 13:50:16,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 13:50:16,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 13:50:16,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 13:50:16,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 13:50:16,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:50:16" (1/1) ... [2022-03-18 13:50:16,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6caf23ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:16, skipping insertion in model container [2022-03-18 13:50:16,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:50:16" (1/1) ... [2022-03-18 13:50:16,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 13:50:16,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 13:50:17,051 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_valuebound10.i[951,964] [2022-03-18 13:50:17,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 13:50:17,085 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 13:50:17,093 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_valuebound10.i[951,964] [2022-03-18 13:50:17,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 13:50:17,111 INFO L208 MainTranslator]: Completed translation [2022-03-18 13:50:17,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17 WrapperNode [2022-03-18 13:50:17,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 13:50:17,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 13:50:17,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 13:50:17,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 13:50:17,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17" (1/1) ... [2022-03-18 13:50:17,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17" (1/1) ... [2022-03-18 13:50:17,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17" (1/1) ... [2022-03-18 13:50:17,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17" (1/1) ... [2022-03-18 13:50:17,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17" (1/1) ... [2022-03-18 13:50:17,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17" (1/1) ... [2022-03-18 13:50:17,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17" (1/1) ... [2022-03-18 13:50:17,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 13:50:17,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 13:50:17,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 13:50:17,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 13:50:17,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17" (1/1) ... [2022-03-18 13:50:17,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 13:50:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:50:17,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 13:50:17,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 13:50:17,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 13:50:17,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 13:50:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 13:50:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 13:50:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 13:50:17,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 13:50:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 13:50:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 13:50:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 13:50:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 13:50:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 13:50:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 13:50:17,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 13:50:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 13:50:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 13:50:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 13:50:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 13:50:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 13:50:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 13:50:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 13:50:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 13:50:17,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 13:50:17,264 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 13:50:17,265 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 13:50:17,339 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 13:50:17,343 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 13:50:17,343 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 13:50:17,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:50:17 BoogieIcfgContainer [2022-03-18 13:50:17,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 13:50:17,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 13:50:17,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 13:50:17,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 13:50:17,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:50:16" (1/3) ... [2022-03-18 13:50:17,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2e6100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:50:17, skipping insertion in model container [2022-03-18 13:50:17,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:50:17" (2/3) ... [2022-03-18 13:50:17,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2e6100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:50:17, skipping insertion in model container [2022-03-18 13:50:17,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:50:17" (3/3) ... [2022-03-18 13:50:17,350 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound10.i [2022-03-18 13:50:17,352 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 13:50:17,353 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 13:50:17,378 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 13:50:17,382 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 13:50:17,383 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 13:50:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 13:50:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 13:50:17,394 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:50:17,395 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:50:17,395 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:50:17,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:50:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2022-03-18 13:50:17,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:50:17,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792999204] [2022-03-18 13:50:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:17,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:50:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:50:17,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 13:50:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:50:17,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 13:50:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:50:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:50:17,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:50:17,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792999204] [2022-03-18 13:50:17,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792999204] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:50:17,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:50:17,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 13:50:17,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031866720] [2022-03-18 13:50:17,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:50:17,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 13:50:17,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:50:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 13:50:17,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 13:50:17,525 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 13:50:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:50:17,572 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-03-18 13:50:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 13:50:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-18 13:50:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:50:17,578 INFO L225 Difference]: With dead ends: 51 [2022-03-18 13:50:17,578 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 13:50:17,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 13:50:17,582 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:50:17,583 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:50:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 13:50:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 13:50:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-03-18 13:50:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-18 13:50:17,626 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2022-03-18 13:50:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:50:17,627 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-18 13:50:17,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 13:50:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-18 13:50:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 13:50:17,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:50:17,628 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:50:17,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 13:50:17,628 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:50:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:50:17,629 INFO L85 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2022-03-18 13:50:17,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:50:17,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391798286] [2022-03-18 13:50:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:17,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:50:17,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:50:17,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519039359] [2022-03-18 13:50:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:17,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:50:17,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:50:17,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:50:17,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 13:50:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:50:17,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 13:50:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:50:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:50:17,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 13:50:17,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:50:17,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391798286] [2022-03-18 13:50:17,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:50:17,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519039359] [2022-03-18 13:50:17,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519039359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:50:17,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:50:17,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 13:50:17,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656771863] [2022-03-18 13:50:17,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:50:17,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 13:50:17,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:50:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 13:50:17,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 13:50:17,946 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 13:50:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:50:18,000 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-03-18 13:50:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 13:50:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-03-18 13:50:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:50:18,002 INFO L225 Difference]: With dead ends: 37 [2022-03-18 13:50:18,002 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 13:50:18,002 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-18 13:50:18,003 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 13:50:18,004 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 13:50:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 13:50:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-18 13:50:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 13:50:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-18 13:50:18,009 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2022-03-18 13:50:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:50:18,009 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-18 13:50:18,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 13:50:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-18 13:50:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 13:50:18,010 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:50:18,010 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:50:18,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 13:50:18,211 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 [2022-03-18 13:50:18,211 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:50:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:50:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2022-03-18 13:50:18,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:50:18,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956873564] [2022-03-18 13:50:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:50:18,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:50:18,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490719491] [2022-03-18 13:50:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:18,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:50:18,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:50:18,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:50:18,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 13:50:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:50:18,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 13:50:18,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:50:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:50:18,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 13:50:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:50:18,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:50:18,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956873564] [2022-03-18 13:50:18,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:50:18,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490719491] [2022-03-18 13:50:18,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490719491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 13:50:18,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 13:50:18,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-18 13:50:18,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022825388] [2022-03-18 13:50:18,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 13:50:18,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 13:50:18,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:50:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 13:50:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 13:50:18,595 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 13:50:20,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 13:50:22,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 13:50:24,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 13:50:26,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 13:50:28,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 13:50:31,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 13:50:31,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:50:31,359 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-03-18 13:50:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 13:50:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-03-18 13:50:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:50:31,361 INFO L225 Difference]: With dead ends: 59 [2022-03-18 13:50:31,361 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 13:50:31,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-03-18 13:50:31,363 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 16 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-03-18 13:50:31,363 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 128 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 84 Invalid, 5 Unknown, 0 Unchecked, 12.7s Time] [2022-03-18 13:50:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 13:50:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-03-18 13:50:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 13:50:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-03-18 13:50:31,373 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 21 [2022-03-18 13:50:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:50:31,373 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-03-18 13:50:31,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 13:50:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-03-18 13:50:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 13:50:31,374 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:50:31,374 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:50:31,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 13:50:31,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 13:50:31,574 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:50:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:50:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2022-03-18 13:50:31,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:50:31,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411117861] [2022-03-18 13:50:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:31,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:50:31,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:50:31,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372224745] [2022-03-18 13:50:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:31,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:50:31,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:50:31,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 13:50:31,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 13:50:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 13:50:31,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 13:50:31,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:50:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 13:50:31,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 13:50:31,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:50:31,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411117861] [2022-03-18 13:50:31,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:50:31,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372224745] [2022-03-18 13:50:31,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372224745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:50:31,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:50:31,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 13:50:31,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322123869] [2022-03-18 13:50:31,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:50:31,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 13:50:31,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:50:31,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 13:50:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 13:50:31,729 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:50:33,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 13:50:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:50:33,857 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-18 13:50:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 13:50:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-03-18 13:50:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:50:33,859 INFO L225 Difference]: With dead ends: 66 [2022-03-18 13:50:33,859 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 13:50:33,859 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 13:50:33,860 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:50:33,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 13:50:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 13:50:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-18 13:50:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 13:50:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-03-18 13:50:33,865 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 27 [2022-03-18 13:50:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:50:33,865 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-03-18 13:50:33,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 13:50:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-03-18 13:50:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 13:50:33,866 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:50:33,866 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:50:33,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 13:50:34,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:50:34,067 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:50:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:50:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash -841192370, now seen corresponding path program 2 times [2022-03-18 13:50:34,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:50:34,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373833231] [2022-03-18 13:50:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:34,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:50:34,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:50:34,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [299692510] [2022-03-18 13:50:34,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 13:50:34,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:50:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:50:34,084 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) [2022-03-18 13:50:34,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 13:50:34,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 13:50:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 13:50:34,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 13:50:34,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 13:50:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 13:50:34,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 13:50:34,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 13:50:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373833231] [2022-03-18 13:50:34,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 13:50:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299692510] [2022-03-18 13:50:34,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299692510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 13:50:34,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 13:50:34,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 13:50:34,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111753970] [2022-03-18 13:50:34,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 13:50:34,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 13:50:34,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 13:50:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 13:50:34,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 13:50:34,273 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 13:50:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 13:50:34,373 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-03-18 13:50:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 13:50:34,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-03-18 13:50:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 13:50:34,374 INFO L225 Difference]: With dead ends: 51 [2022-03-18 13:50:34,374 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 13:50:34,375 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 13:50:34,375 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 13:50:34,375 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 97 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 13:50:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 13:50:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2022-03-18 13:50:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 13:50:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-03-18 13:50:34,380 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2022-03-18 13:50:34,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 13:50:34,381 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-03-18 13:50:34,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 13:50:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-03-18 13:50:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 13:50:34,381 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 13:50:34,381 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 13:50:34,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 13:50:34,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:50:34,600 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 13:50:34,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 13:50:34,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 1 times [2022-03-18 13:50:34,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 13:50:34,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401283420] [2022-03-18 13:50:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:34,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 13:50:34,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 13:50:34,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003056195] [2022-03-18 13:50:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 13:50:34,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 13:50:34,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 13:50:34,617 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) [2022-03-18 13:50:34,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process