/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench/divbin.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:51:21,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:51:21,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:51:21,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 15:51:21,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 15:51:21,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 15:51:21,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 15:51:21,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 15:51:21,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 15:51:21,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 15:51:21,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 15:51:21,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 15:51:21,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 15:51:21,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 15:51:21,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 15:51:21,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 15:51:21,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 15:51:21,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 15:51:21,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 15:51:21,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 15:51:21,378 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 15:51:21,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 15:51:21,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 15:51:21,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 15:51:21,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 15:51:21,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 15:51:21,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 15:51:21,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 15:51:21,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 15:51:21,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 15:51:21,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-17 15:51:21,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-17 15:51:21,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-17 15:51:21,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-17 15:51:21,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-17 15:51:21,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-17 15:51:21,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-17 15:51:21,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-17 15:51:21,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-17 15:51:21,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:51:21,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:51:21,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:51:21,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:51:21,400 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:51:21,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:51:21,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:51:21,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:51:21,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:51:21,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:51:21,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:51:21,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:51:21,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:51:21,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:51:21,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:51:21,402 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:51:21,403 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:51:21,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:51:21,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:51:21,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:51:21,595 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:51:21,595 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:51:21,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/divbin.i [2022-03-17 15:51:21,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e021049/aab8ee014d2a487a98f6b27689ed4870/FLAGed4f2bc04 [2022-03-17 15:51:21,990 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:51:21,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/divbin.i [2022-03-17 15:51:21,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e021049/aab8ee014d2a487a98f6b27689ed4870/FLAGed4f2bc04 [2022-03-17 15:51:22,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42e021049/aab8ee014d2a487a98f6b27689ed4870 [2022-03-17 15:51:22,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:51:22,423 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:51:22,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:51:22,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:51:22,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:51:22,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480cff66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22, skipping insertion in model container [2022-03-17 15:51:22,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:51:22,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:51:22,541 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/divbin.i[950,963] [2022-03-17 15:51:22,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:51:22,554 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:51:22,561 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/divbin.i[950,963] [2022-03-17 15:51:22,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:51:22,572 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:51:22,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22 WrapperNode [2022-03-17 15:51:22,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:51:22,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:51:22,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:51:22,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:51:22,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:51:22,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:51:22,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:51:22,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:51:22,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:51:22,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:22,611 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) [2022-03-17 15:51:22,615 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 [2022-03-17 15:51:22,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:51:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:51:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:51:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:51:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:51:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:51:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:51:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:51:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 15:51:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 15:51:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:51:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:51:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 15:51:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:51:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:51:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:51:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:51:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:51:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:51:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:51:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:51:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:51:22,677 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:51:22,678 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:51:22,809 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:51:22,828 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:51:22,829 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 15:51:22,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:51:22 BoogieIcfgContainer [2022-03-17 15:51:22,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:51:22,830 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:51:22,830 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:51:22,838 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:51:22,844 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:51:22" (1/1) ... [2022-03-17 15:51:22,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:51:22 BasicIcfg [2022-03-17 15:51:22,857 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:51:22,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:51:22,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:51:22,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:51:22,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:51:22" (1/4) ... [2022-03-17 15:51:22,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b24ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:51:22, skipping insertion in model container [2022-03-17 15:51:22,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:51:22" (2/4) ... [2022-03-17 15:51:22,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b24ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:51:22, skipping insertion in model container [2022-03-17 15:51:22,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:51:22" (3/4) ... [2022-03-17 15:51:22,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b24ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:51:22, skipping insertion in model container [2022-03-17 15:51:22,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:51:22" (4/4) ... [2022-03-17 15:51:22,866 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin.iJordan [2022-03-17 15:51:22,870 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:51:22,870 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:51:22,910 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:51:22,916 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 15:51:22,916 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:51:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 15:51:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 15:51:22,941 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:22,942 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:22,942 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash 227793864, now seen corresponding path program 1 times [2022-03-17 15:51:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:22,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064251179] [2022-03-17 15:51:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:22,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:23,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:23,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 15:51:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:23,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 15:51:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:51:23,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:23,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064251179] [2022-03-17 15:51:23,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064251179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:51:23,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:51:23,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:51:23,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049148414] [2022-03-17 15:51:23,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:23,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:51:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:23,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:51:23,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:51:23,165 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 15:51:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:23,216 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-17 15:51:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:51:23,218 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 15:51:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:23,222 INFO L225 Difference]: With dead ends: 31 [2022-03-17 15:51:23,223 INFO L226 Difference]: Without dead ends: 26 [2022-03-17 15:51:23,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:51:23,226 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:23,227 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:51:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-17 15:51:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-17 15:51:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 15:51:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-03-17 15:51:23,259 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 23 [2022-03-17 15:51:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:23,260 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-03-17 15:51:23,260 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 15:51:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-03-17 15:51:23,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 15:51:23,262 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:23,262 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:23,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:51:23,262 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:23,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1977749520, now seen corresponding path program 1 times [2022-03-17 15:51:23,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:23,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334625059] [2022-03-17 15:51:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:23,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:23,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:51:23,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090849711] [2022-03-17 15:51:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:23,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:23,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:23,300 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) [2022-03-17 15:51:23,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:51:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 15:51:23,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:51:23,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:51:23,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:23,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334625059] [2022-03-17 15:51:23,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:51:23,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090849711] [2022-03-17 15:51:23,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090849711] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:23,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 15:51:23,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 15:51:23,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496774333] [2022-03-17 15:51:23,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:23,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:51:23,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:51:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 15:51:23,775 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 15:51:25,844 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 [] [2022-03-17 15:51:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:25,946 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-03-17 15:51:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 15:51:25,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-17 15:51:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:25,952 INFO L225 Difference]: With dead ends: 36 [2022-03-17 15:51:25,952 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 15:51:25,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-17 15:51:25,953 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:25,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 110 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-17 15:51:25,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 15:51:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 15:51:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 15:51:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-03-17 15:51:25,958 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2022-03-17 15:51:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:25,958 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-03-17 15:51:25,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 15:51:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-03-17 15:51:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 15:51:25,959 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:25,959 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:25,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:26,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:26,161 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:26,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:26,161 INFO L85 PathProgramCache]: Analyzing trace with hash 154407786, now seen corresponding path program 1 times [2022-03-17 15:51:26,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:26,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565555807] [2022-03-17 15:51:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:26,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:26,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:51:26,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808042963] [2022-03-17 15:51:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:26,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:26,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:26,173 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) [2022-03-17 15:51:26,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:51:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:26,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 15:51:26,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 15:51:26,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:51:26,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:26,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565555807] [2022-03-17 15:51:26,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:51:26,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808042963] [2022-03-17 15:51:26,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808042963] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:26,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 15:51:26,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 15:51:26,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712079715] [2022-03-17 15:51:26,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:26,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:51:26,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:26,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:51:26,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-17 15:51:26,613 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 15:51:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:26,637 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-03-17 15:51:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:51:26,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-17 15:51:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:26,639 INFO L225 Difference]: With dead ends: 41 [2022-03-17 15:51:26,639 INFO L226 Difference]: Without dead ends: 41 [2022-03-17 15:51:26,640 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-17 15:51:26,640 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:26,641 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-03-17 15:51:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-17 15:51:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-17 15:51:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 15:51:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-03-17 15:51:26,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2022-03-17 15:51:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:26,646 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-03-17 15:51:26,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 15:51:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-03-17 15:51:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 15:51:26,649 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:26,649 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:26,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:26,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 15:51:26,860 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:26,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1097850398, now seen corresponding path program 1 times [2022-03-17 15:51:26,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:26,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554875198] [2022-03-17 15:51:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:26,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:26,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:51:26,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120485547] [2022-03-17 15:51:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:26,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:26,872 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) [2022-03-17 15:51:26,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:51:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:26,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 15:51:26,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:51:26,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 15:51:26,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:26,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554875198] [2022-03-17 15:51:26,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:51:26,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120485547] [2022-03-17 15:51:26,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120485547] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:51:26,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:51:26,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:51:26,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177800137] [2022-03-17 15:51:26,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:26,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:51:26,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:51:26,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:51:26,951 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 15:51:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:26,966 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-03-17 15:51:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:51:26,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-17 15:51:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:26,969 INFO L225 Difference]: With dead ends: 41 [2022-03-17 15:51:26,969 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 15:51:26,969 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:51:26,972 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:26,972 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:51:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 15:51:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-17 15:51:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 15:51:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-17 15:51:26,986 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 32 [2022-03-17 15:51:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:26,986 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-17 15:51:26,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 15:51:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-17 15:51:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 15:51:26,987 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:26,987 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-17 15:51:27,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:27,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:27,192 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:27,193 INFO L85 PathProgramCache]: Analyzing trace with hash 71689796, now seen corresponding path program 1 times [2022-03-17 15:51:27,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:27,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765613067] [2022-03-17 15:51:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:27,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:27,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:51:27,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506901213] [2022-03-17 15:51:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:27,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:27,204 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) [2022-03-17 15:51:27,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 15:51:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 15:51:27,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:51:27,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:51:27,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:27,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765613067] [2022-03-17 15:51:27,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 15:51:27,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506901213] [2022-03-17 15:51:27,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506901213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:51:27,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:51:27,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-17 15:51:27,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271100933] [2022-03-17 15:51:27,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 15:51:27,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 15:51:27,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:27,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 15:51:27,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 15:51:27,413 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 15:51:29,469 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 [] [2022-03-17 15:51:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:29,557 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-03-17 15:51:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 15:51:29,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-03-17 15:51:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:29,558 INFO L225 Difference]: With dead ends: 38 [2022-03-17 15:51:29,558 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 15:51:29,558 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-17 15:51:29,559 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:29,559 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 149 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-17 15:51:29,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 15:51:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-17 15:51:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 15:51:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-17 15:51:29,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 32 [2022-03-17 15:51:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:29,562 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-17 15:51:29,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 15:51:29,562 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-17 15:51:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 15:51:29,562 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:29,562 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:29,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:29,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:29,775 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1313859480, now seen corresponding path program 1 times [2022-03-17 15:51:29,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:29,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667240778] [2022-03-17 15:51:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:29,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:29,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 15:51:29,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820936574] [2022-03-17 15:51:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:29,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:29,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:29,786 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) [2022-03-17 15:51:29,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process