/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/hard-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:56:51,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:56:51,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:56:51,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 00:56:51,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 00:56:51,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 00:56:51,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 00:56:51,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 00:56:51,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 00:56:51,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 00:56:51,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 00:56:51,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 00:56:51,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 00:56:51,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 00:56:51,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 00:56:51,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 00:56:51,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 00:56:51,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 00:56:51,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 00:56:51,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 00:56:51,398 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 00:56:51,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 00:56:51,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 00:56:51,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 00:56:51,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 00:56:51,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 00:56:51,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 00:56:51,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 00:56:51,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 00:56:51,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 00:56:51,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 00:56:51,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 00:56:51,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 00:56:51,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 00:56:51,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 00:56:51,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 00:56:51,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 00:56:51,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 00:56:51,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 00:56:51,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 00:56:51,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 00:56:51,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 00:56:51,414 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 [2022-03-20 00:56:51,438 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:56:51,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:56:51,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:56:51,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:56:51,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:56:51,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:56:51,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:56:51,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:56:51,440 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:56:51,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:56:51,441 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:56:51,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:56:51,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:56:51,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:56:51,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:56:51,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:56:51,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:56:51,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:56:51,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:56:51,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:56:51,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:56:51,444 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:56:51,444 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:56:51,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:56:51,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:56:51,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:56:51,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:56:51,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:56:51,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:56:51,657 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:56:51,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2022-03-20 00:56:51,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c17265e7/560a85b6110c447183a2e2499715e9a6/FLAGb8faa7592 [2022-03-20 00:56:52,088 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:56:52,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2022-03-20 00:56:52,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c17265e7/560a85b6110c447183a2e2499715e9a6/FLAGb8faa7592 [2022-03-20 00:56:52,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c17265e7/560a85b6110c447183a2e2499715e9a6 [2022-03-20 00:56:52,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:56:52,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:56:52,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:56:52,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:56:52,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:56:52,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7845ccb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52, skipping insertion in model container [2022-03-20 00:56:52,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:56:52,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:56:52,244 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/hard-ll_valuebound100.c[538,551] [2022-03-20 00:56:52,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:56:52,276 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:56:52,284 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/hard-ll_valuebound100.c[538,551] [2022-03-20 00:56:52,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:56:52,299 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:56:52,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52 WrapperNode [2022-03-20 00:56:52,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:56:52,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:56:52,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:56:52,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:56:52,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:56:52,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:56:52,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:56:52,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:56:52,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52" (1/1) ... [2022-03-20 00:56:52,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:56:52,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:52,386 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 00:56:52,403 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 00:56:52,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:56:52,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:56:52,421 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:56:52,422 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:56:52,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:56:52,423 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:56:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:56:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:56:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:56:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:56:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 00:56:52,423 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:56:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:56:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:56:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:56:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:56:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:56:52,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:56:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:56:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:56:52,467 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:56:52,468 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:56:52,571 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:56:52,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:56:52,575 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 00:56:52,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:56:52 BoogieIcfgContainer [2022-03-20 00:56:52,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:56:52,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:56:52,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:56:52,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:56:52,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:56:52" (1/3) ... [2022-03-20 00:56:52,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b99646c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:56:52, skipping insertion in model container [2022-03-20 00:56:52,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:52" (2/3) ... [2022-03-20 00:56:52,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b99646c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:56:52, skipping insertion in model container [2022-03-20 00:56:52,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:56:52" (3/3) ... [2022-03-20 00:56:52,582 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2022-03-20 00:56:52,586 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:56:52,586 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:56:52,615 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:56:52,620 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 [2022-03-20 00:56:52,620 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:56:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 00:56:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 00:56:52,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:52,636 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:52,637 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-20 00:56:52,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:52,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175240408] [2022-03-20 00:56:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:52,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:56:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:52,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:56:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:52,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:56:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:52,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:56:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:56:52,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:52,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175240408] [2022-03-20 00:56:52,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175240408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:52,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:52,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:56:52,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690600157] [2022-03-20 00:56:52,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:52,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:56:52,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:56:52,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:56:52,845 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 00:56:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:52,902 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-20 00:56:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:56:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 00:56:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:52,908 INFO L225 Difference]: With dead ends: 69 [2022-03-20 00:56:52,908 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 00:56:52,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:56:52,913 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:52,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:56:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 00:56:52,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 00:56:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:56:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 00:56:52,939 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 00:56:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:52,939 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 00:56:52,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 00:56:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 00:56:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 00:56:52,940 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:52,941 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:52,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:56:52,941 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:52,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-20 00:56:52,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:52,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665545581] [2022-03-20 00:56:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:52,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:56:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:56:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:56:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:56:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:56:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:53,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665545581] [2022-03-20 00:56:53,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665545581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:53,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:53,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:56:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110205708] [2022-03-20 00:56:53,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:53,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:56:53,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:56:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:56:53,031 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 00:56:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:53,158 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 00:56:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:56:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 00:56:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:53,160 INFO L225 Difference]: With dead ends: 46 [2022-03-20 00:56:53,160 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 00:56:53,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:56:53,161 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:53,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:56:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 00:56:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 00:56:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:56:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 00:56:53,170 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 00:56:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:53,170 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 00:56:53,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 00:56:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 00:56:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 00:56:53,171 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:53,171 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:53,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 00:56:53,171 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:53,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:53,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-20 00:56:53,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:53,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056857560] [2022-03-20 00:56:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:53,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:56:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:56:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:56:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:56:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 00:56:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:56:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056857560] [2022-03-20 00:56:53,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056857560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:53,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:53,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:56:53,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902525278] [2022-03-20 00:56:53,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:53,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:56:53,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:56:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:56:53,252 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:56:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:53,420 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 00:56:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:56:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 00:56:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:53,423 INFO L225 Difference]: With dead ends: 50 [2022-03-20 00:56:53,423 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 00:56:53,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:56:53,425 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:53,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:56:53,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 00:56:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 00:56:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:56:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 00:56:53,432 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 00:56:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:53,432 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 00:56:53,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:56:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 00:56:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 00:56:53,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:53,433 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:53,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 00:56:53,434 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:53,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:53,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-20 00:56:53,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:53,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961743990] [2022-03-20 00:56:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:53,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:53,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:53,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004850847] [2022-03-20 00:56:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:53,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:53,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:53,449 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 00:56:53,495 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 00:56:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:53,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 00:56:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 00:56:53,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:56:53,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:53,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961743990] [2022-03-20 00:56:53,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:56:53,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004850847] [2022-03-20 00:56:53,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004850847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:53,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:53,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 00:56:53,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932737447] [2022-03-20 00:56:53,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:53,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 00:56:53,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:53,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 00:56:53,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:56:53,709 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:56:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:53,818 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-20 00:56:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 00:56:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 00:56:53,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:53,819 INFO L225 Difference]: With dead ends: 69 [2022-03-20 00:56:53,819 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 00:56:53,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:56:53,832 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:53,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:56:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 00:56:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 00:56:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 00:56:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 00:56:53,841 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-20 00:56:53,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:53,841 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 00:56:53,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:56:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 00:56:53,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 00:56:53,842 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:53,842 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:53,861 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 00:56:54,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:54,059 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:54,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-20 00:56:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:54,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375381882] [2022-03-20 00:56:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:54,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:54,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626871537] [2022-03-20 00:56:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:54,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:54,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:54,079 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 00:56:54,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:56:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 00:56:54,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 00:56:54,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:56:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:56:54,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:54,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375381882] [2022-03-20 00:56:54,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:56:54,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626871537] [2022-03-20 00:56:54,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626871537] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:56:54,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:56:54,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 00:56:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136905760] [2022-03-20 00:56:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:54,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:56:54,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:56:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:56:54,485 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:56:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:54,523 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-20 00:56:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:56:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-20 00:56:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:54,525 INFO L225 Difference]: With dead ends: 68 [2022-03-20 00:56:54,525 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 00:56:54,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:56:54,526 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:54,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:56:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 00:56:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 00:56:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 00:56:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-20 00:56:54,535 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-20 00:56:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:54,535 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-20 00:56:54,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:56:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-20 00:56:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 00:56:54,536 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:54,536 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:54,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 00:56:54,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:54,768 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-20 00:56:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:54,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291042624] [2022-03-20 00:56:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:54,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:54,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:54,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237434993] [2022-03-20 00:56:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:54,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:54,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:54,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:56:54,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:56:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:54,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 00:56:54,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 00:56:55,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:56:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 00:56:55,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:55,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291042624] [2022-03-20 00:56:55,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:56:55,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237434993] [2022-03-20 00:56:55,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237434993] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:56:55,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:56:55,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 00:56:55,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480970819] [2022-03-20 00:56:55,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:55,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:56:55,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:56:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:56:55,214 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:56:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:55,254 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-20 00:56:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:56:55,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-20 00:56:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:55,255 INFO L225 Difference]: With dead ends: 76 [2022-03-20 00:56:55,255 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 00:56:55,255 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:56:55,256 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:55,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:56:55,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 00:56:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-20 00:56:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 00:56:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-20 00:56:55,264 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-20 00:56:55,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:55,264 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-20 00:56:55,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:56:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-20 00:56:55,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 00:56:55,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:55,266 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:55,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 00:56:55,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:55,482 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-20 00:56:55,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:55,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229115873] [2022-03-20 00:56:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:55,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:55,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:55,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588457251] [2022-03-20 00:56:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:55,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:55,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:55,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:56:55,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 00:56:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:55,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:56:55,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 00:56:55,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:56:55,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229115873] [2022-03-20 00:56:55,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:56:55,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588457251] [2022-03-20 00:56:55,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588457251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:55,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:55,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:56:55,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362378482] [2022-03-20 00:56:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:55,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:56:55,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:55,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:56:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:56:55,654 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 00:56:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:55,689 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-20 00:56:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:56:55,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 00:56:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:55,691 INFO L225 Difference]: With dead ends: 79 [2022-03-20 00:56:55,692 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 00:56:55,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 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 00:56:55,692 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:55,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:56:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 00:56:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 00:56:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 00:56:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-20 00:56:55,701 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-20 00:56:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:55,701 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-20 00:56:55,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 00:56:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-20 00:56:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 00:56:55,702 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:55,702 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:55,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 00:56:55,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:55,924 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:55,924 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-20 00:56:55,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:55,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48102808] [2022-03-20 00:56:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:55,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:55,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433008666] [2022-03-20 00:56:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:55,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:55,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:55,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:56:55,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 00:56:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:56,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 00:56:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-20 00:56:56,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:57:31,639 WARN L232 SmtUtils]: Spent 23.89s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:58:37,601 WARN L232 SmtUtils]: Spent 20.71s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:59:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-20 00:59:39,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:59:39,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48102808] [2022-03-20 00:59:39,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:59:39,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433008666] [2022-03-20 00:59:39,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433008666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:59:39,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:59:39,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-03-20 00:59:39,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198160719] [2022-03-20 00:59:39,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:59:39,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 00:59:39,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:59:39,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 00:59:39,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-20 00:59:39,626 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 00:59:41,737 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 [] [2022-03-20 00:59:43,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:59:52,537 WARN L232 SmtUtils]: Spent 8.67s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:59:53,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:59:56,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:59:58,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:00:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:00,814 INFO L93 Difference]: Finished difference Result 142 states and 184 transitions. [2022-03-20 01:00:00,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 01:00:00,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-03-20 01:00:00,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:00,815 INFO L225 Difference]: With dead ends: 142 [2022-03-20 01:00:00,816 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 01:00:00,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-20 01:00:00,816 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 128 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:00,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 275 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 364 Invalid, 4 Unknown, 0 Unchecked, 11.9s Time] [2022-03-20 01:00:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 01:00:00,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2022-03-20 01:00:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 01:00:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-20 01:00:00,827 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-03-20 01:00:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:00,827 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-20 01:00:00,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 01:00:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-20 01:00:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 01:00:00,828 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:00,828 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:00:00,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 01:00:01,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:01,029 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:01,029 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-20 01:00:01,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:01,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456854271] [2022-03-20 01:00:01,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:01,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:01,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:01,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047969149] [2022-03-20 01:00:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:01,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:01,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:01,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 01:00:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:00:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 01:00:01,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:00:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 01:00:01,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:00:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 01:00:01,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:01,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456854271] [2022-03-20 01:00:01,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:01,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047969149] [2022-03-20 01:00:01,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047969149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:00:01,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:00:01,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-20 01:00:01,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713055483] [2022-03-20 01:00:01,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:00:01,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 01:00:01,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:01,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 01:00:01,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-20 01:00:01,477 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 01:00:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:01,585 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-03-20 01:00:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 01:00:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-20 01:00:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:01,586 INFO L225 Difference]: With dead ends: 116 [2022-03-20 01:00:01,586 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 01:00:01,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:00:01,587 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:01,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:00:01,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 01:00:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-03-20 01:00:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 01:00:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-03-20 01:00:01,597 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-03-20 01:00:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:01,597 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-03-20 01:00:01,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 01:00:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-03-20 01:00:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 01:00:01,598 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:01,598 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:00:01,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 01:00:01,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:01,799 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1353450239, now seen corresponding path program 2 times [2022-03-20 01:00:01,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:01,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083603529] [2022-03-20 01:00:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:01,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:01,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:01,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265907789] [2022-03-20 01:00:01,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:00:01,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:01,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:01,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:01,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 01:00:01,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:00:01,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:00:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 01:00:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:00:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 01:00:01,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:00:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 01:00:02,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083603529] [2022-03-20 01:00:02,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265907789] [2022-03-20 01:00:02,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265907789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:00:02,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:00:02,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-20 01:00:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487404797] [2022-03-20 01:00:02,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:00:02,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:00:02,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:00:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:00:02,198 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 01:00:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:02,263 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-03-20 01:00:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 01:00:02,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-03-20 01:00:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:02,265 INFO L225 Difference]: With dead ends: 130 [2022-03-20 01:00:02,265 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 01:00:02,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:00:02,266 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:02,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 01:00:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 01:00:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 01:00:02,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 01:00:02,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-03-20 01:00:02,280 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-03-20 01:00:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:02,280 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-03-20 01:00:02,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 01:00:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-03-20 01:00:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 01:00:02,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:02,281 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:00:02,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 01:00:02,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:02,496 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1550260511, now seen corresponding path program 1 times [2022-03-20 01:00:02,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:02,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061546739] [2022-03-20 01:00:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:02,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:02,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:02,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375065504] [2022-03-20 01:00:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:02,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:02,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:02,514 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:02,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 01:00:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:00:02,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 01:00:02,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:00:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 01:00:02,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:00:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 01:00:03,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:03,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061546739] [2022-03-20 01:00:03,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:03,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375065504] [2022-03-20 01:00:03,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375065504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:00:03,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:00:03,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 01:00:03,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764215182] [2022-03-20 01:00:03,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:00:03,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 01:00:03,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 01:00:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 01:00:03,082 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 01:00:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:03,311 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2022-03-20 01:00:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 01:00:03,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-03-20 01:00:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:03,312 INFO L225 Difference]: With dead ends: 119 [2022-03-20 01:00:03,312 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 01:00:03,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 01:00:03,313 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:03,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 325 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 01:00:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 01:00:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-20 01:00:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 01:00:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-03-20 01:00:03,323 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-03-20 01:00:03,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:03,323 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-03-20 01:00:03,323 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 01:00:03,323 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-03-20 01:00:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 01:00:03,324 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:03,325 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:00:03,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 01:00:03,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 01:00:03,541 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash -941589367, now seen corresponding path program 1 times [2022-03-20 01:00:03,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:03,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803978470] [2022-03-20 01:00:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:03,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:03,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:03,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564681301] [2022-03-20 01:00:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:03,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:03,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:03,553 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:03,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 01:00:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 01:00:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 01:00:03,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:00:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-03-20 01:00:03,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 01:00:03,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:03,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803978470] [2022-03-20 01:00:03,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:03,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564681301] [2022-03-20 01:00:03,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564681301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 01:00:03,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 01:00:03,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 01:00:03,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121743832] [2022-03-20 01:00:03,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 01:00:03,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 01:00:03,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 01:00:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:00:03,729 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 01:00:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:00:03,781 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-03-20 01:00:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 01:00:03,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-03-20 01:00:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:00:03,782 INFO L225 Difference]: With dead ends: 116 [2022-03-20 01:00:03,782 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 01:00:03,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 01:00:03,782 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:00:03,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 129 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 01:00:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 01:00:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-20 01:00:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 01:00:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-03-20 01:00:03,790 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-03-20 01:00:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:00:03,790 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-03-20 01:00:03,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 01:00:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-03-20 01:00:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 01:00:03,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:00:03,791 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:00:03,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 01:00:04,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:04,004 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:00:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:00:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 3 times [2022-03-20 01:00:04,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:00:04,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229895266] [2022-03-20 01:00:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:00:04,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:00:04,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:00:04,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197325287] [2022-03-20 01:00:04,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 01:00:04,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:00:04,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:00:04,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:00:04,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 01:00:04,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 01:00:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:00:04,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 01:00:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:00:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-03-20 01:00:04,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:00:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 01:00:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:51,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229895266] [2022-03-20 01:00:51,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:51,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197325287] [2022-03-20 01:00:51,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197325287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:00:51,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:00:51,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-03-20 01:00:51,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891004490] [2022-03-20 01:00:51,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:00:51,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 01:00:51,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 01:00:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=419, Unknown=2, NotChecked=0, Total=506 [2022-03-20 01:00:51,851 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-03-20 01:01:57,091 WARN L232 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 196 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:01:59,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:01,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:04:05,798 WARN L232 SmtUtils]: Spent 2.06m on a formula simplification. DAG size of input: 172 DAG size of output: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:04:08,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:05:09,321 WARN L232 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 195 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:05:11,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:05:12,971 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:05:16,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:05:24,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:05:27,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:05:29,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:05:32,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:05:36,892 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 [] [2022-03-20 01:05:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:05:36,939 INFO L93 Difference]: Finished difference Result 218 states and 285 transitions. [2022-03-20 01:05:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 01:05:36,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) Word has length 105 [2022-03-20 01:05:36,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:05:36,940 INFO L225 Difference]: With dead ends: 218 [2022-03-20 01:05:36,940 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 01:05:36,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 269.2s TimeCoverageRelationStatistics Valid=198, Invalid=922, Unknown=2, NotChecked=0, Total=1122 [2022-03-20 01:05:36,941 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 121 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 268 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:05:36,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 544 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 762 Invalid, 8 Unknown, 0 Unchecked, 28.0s Time] [2022-03-20 01:05:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 01:05:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 153. [2022-03-20 01:05:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 97 states have internal predecessors, (102), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 01:05:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2022-03-20 01:05:36,979 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 105 [2022-03-20 01:05:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:05:36,983 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2022-03-20 01:05:36,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 11 states have call predecessors, (31), 9 states have call successors, (31) [2022-03-20 01:05:36,984 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2022-03-20 01:05:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 01:05:36,998 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:05:36,998 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:05:37,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 01:05:37,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 01:05:37,200 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:05:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:05:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 2 times [2022-03-20 01:05:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:05:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758548896] [2022-03-20 01:05:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:05:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:05:37,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:05:37,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349335727] [2022-03-20 01:05:37,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:05:37,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:05:37,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:05:37,236 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:05:37,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 01:05:37,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:05:37,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:05:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 01:05:37,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:05:38,264 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 01:05:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 106 proven. 30 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-20 01:05:38,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:05:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-20 01:05:39,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:05:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758548896] [2022-03-20 01:05:39,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:05:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349335727] [2022-03-20 01:05:39,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349335727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:05:39,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:05:39,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-03-20 01:05:39,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369064555] [2022-03-20 01:05:39,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:05:39,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 01:05:39,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:05:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 01:05:39,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-20 01:05:39,434 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 01:05:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:05:40,494 INFO L93 Difference]: Finished difference Result 224 states and 274 transitions. [2022-03-20 01:05:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 01:05:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 116 [2022-03-20 01:05:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:05:40,495 INFO L225 Difference]: With dead ends: 224 [2022-03-20 01:05:40,495 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 01:05:40,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-20 01:05:40,496 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 40 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 01:05:40,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 410 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 01:05:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 01:05:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 134. [2022-03-20 01:05:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 86 states have internal predecessors, (90), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (33), 29 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 01:05:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2022-03-20 01:05:40,528 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 116 [2022-03-20 01:05:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:05:40,529 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2022-03-20 01:05:40,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 01:05:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2022-03-20 01:05:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 01:05:40,531 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:05:40,531 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:05:40,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 01:05:40,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 01:05:40,739 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:05:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:05:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 4 times [2022-03-20 01:05:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:05:40,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098521704] [2022-03-20 01:05:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:05:40,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:05:40,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:05:40,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841467016] [2022-03-20 01:05:40,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 01:05:40,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:05:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:05:40,748 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:05:40,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 01:05:40,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 01:05:40,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:05:40,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 01:05:40,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:05:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-20 01:05:41,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:06:32,327 WARN L232 SmtUtils]: Spent 7.12s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:07:53,766 WARN L232 SmtUtils]: Spent 33.08s on a formula simplification that was a NOOP. DAG size: 451 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:09:52,373 WARN L232 SmtUtils]: Spent 18.55s on a formula simplification. DAG size of input: 123 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:10:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-20 01:10:31,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:10:31,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098521704] [2022-03-20 01:10:31,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:10:31,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841467016] [2022-03-20 01:10:31,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841467016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:10:31,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:10:31,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-03-20 01:10:31,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843181138] [2022-03-20 01:10:31,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:10:31,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 01:10:31,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:10:31,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 01:10:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=518, Unknown=1, NotChecked=0, Total=650 [2022-03-20 01:10:31,874 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 17 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (40), 15 states have call predecessors, (40), 15 states have call successors, (40)