/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-scaling/dijkstra-u_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 06:08:20,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 06:08:20,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 06:08:20,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 06:08:20,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 06:08:20,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 06:08:20,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 06:08:20,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 06:08:20,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 06:08:20,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 06:08:20,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 06:08:20,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 06:08:20,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 06:08:20,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 06:08:20,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 06:08:20,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 06:08:20,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 06:08:20,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 06:08:20,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 06:08:20,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 06:08:20,669 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 06:08:20,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 06:08:20,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 06:08:20,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 06:08:20,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 06:08:20,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 06:08:20,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 06:08:20,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 06:08:20,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 06:08:20,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 06:08:20,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 06:08:20,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 06:08:20,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 06:08:20,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 06:08:20,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 06:08:20,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 06:08:20,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 06:08:20,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 06:08:20,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 06:08:20,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 06:08:20,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 06:08:20,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 06:08:20,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 06:08:20,699 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 06:08:20,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 06:08:20,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 06:08:20,700 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 06:08:20,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 06:08:20,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 06:08:20,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 06:08:20,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 06:08:20,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 06:08:20,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 06:08:20,701 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 06:08:20,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 06:08:20,702 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 06:08:20,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 06:08:20,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 06:08:20,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 06:08:20,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 06:08:20,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 06:08:20,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:08:20,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 06:08:20,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 06:08:20,703 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 06:08:20,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 06:08:20,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 06:08:20,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 06:08:20,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 06:08:20,927 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 06:08:20,928 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 06:08:20,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2022-04-06 06:08:20,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee417cd82/c2d3dcd6cc4d4254afb4e236aee5c5b7/FLAG8d18789b0 [2022-04-06 06:08:21,356 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 06:08:21,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound5.c [2022-04-06 06:08:21,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee417cd82/c2d3dcd6cc4d4254afb4e236aee5c5b7/FLAG8d18789b0 [2022-04-06 06:08:21,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee417cd82/c2d3dcd6cc4d4254afb4e236aee5c5b7 [2022-04-06 06:08:21,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 06:08:21,378 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 06:08:21,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 06:08:21,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 06:08:21,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 06:08:21,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d3ceea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21, skipping insertion in model container [2022-04-06 06:08:21,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 06:08:21,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 06:08:21,559 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/dijkstra-u_unwindbound5.c[525,538] [2022-04-06 06:08:21,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:08:21,604 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 06:08:21,616 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/dijkstra-u_unwindbound5.c[525,538] [2022-04-06 06:08:21,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:08:21,652 INFO L208 MainTranslator]: Completed translation [2022-04-06 06:08:21,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21 WrapperNode [2022-04-06 06:08:21,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 06:08:21,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 06:08:21,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 06:08:21,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 06:08:21,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 06:08:21,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 06:08:21,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 06:08:21,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 06:08:21,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21" (1/1) ... [2022-04-06 06:08:21,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:08:21,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:21,728 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) [2022-04-06 06:08:21,735 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 [2022-04-06 06:08:21,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 06:08:21,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 06:08:21,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 06:08:21,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 06:08:21,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 06:08:21,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 06:08:21,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 06:08:21,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 06:08:21,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 06:08:21,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 06:08:21,819 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 06:08:21,820 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 06:08:21,994 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 06:08:21,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 06:08:21,999 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 06:08:22,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:22 BoogieIcfgContainer [2022-04-06 06:08:22,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 06:08:22,001 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 06:08:22,001 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 06:08:22,001 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 06:08:22,003 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:22" (1/1) ... [2022-04-06 06:08:22,005 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 06:08:22,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:22 BasicIcfg [2022-04-06 06:08:22,019 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 06:08:22,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 06:08:22,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 06:08:22,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 06:08:22,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:08:21" (1/4) ... [2022-04-06 06:08:22,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab02068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:22, skipping insertion in model container [2022-04-06 06:08:22,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:21" (2/4) ... [2022-04-06 06:08:22,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab02068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:22, skipping insertion in model container [2022-04-06 06:08:22,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:22" (3/4) ... [2022-04-06 06:08:22,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab02068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:08:22, skipping insertion in model container [2022-04-06 06:08:22,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:22" (4/4) ... [2022-04-06 06:08:22,038 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound5.cJordan [2022-04-06 06:08:22,042 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 06:08:22,042 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 06:08:22,078 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 06:08:22,084 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 [2022-04-06 06:08:22,085 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 06:08:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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) [2022-04-06 06:08:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 06:08:22,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:22,102 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:22,102 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:22,107 INFO L85 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2022-04-06 06:08:22,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:22,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052563600] [2022-04-06 06:08:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:22,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:22,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:08:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:22,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:08:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:22,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052563600] [2022-04-06 06:08:22,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052563600] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:22,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:22,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 06:08:22,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968654549] [2022-04-06 06:08:22,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:22,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 06:08:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 06:08:22,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:08:22,324 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:08:32,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.75s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:34,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:34,499 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-04-06 06:08:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 06:08:34,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 06:08:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:34,507 INFO L225 Difference]: With dead ends: 40 [2022-04-06 06:08:34,508 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 06:08:34,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:08:34,510 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:34,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 12.2s Time] [2022-04-06 06:08:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 06:08:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 06:08:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-04-06 06:08:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-04-06 06:08:34,534 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-04-06 06:08:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:34,535 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-04-06 06:08:34,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:08:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-04-06 06:08:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 06:08:34,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:34,536 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:34,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 06:08:34,536 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2022-04-06 06:08:34,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:34,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826198101] [2022-04-06 06:08:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:34,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:34,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:08:34,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397787725] [2022-04-06 06:08:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:34,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:34,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:34,549 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) [2022-04-06 06:08:34,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 06:08:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 06:08:34,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:08:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:34,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:08:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:34,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826198101] [2022-04-06 06:08:34,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:08:34,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397787725] [2022-04-06 06:08:34,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397787725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:34,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:34,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 06:08:34,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121201915] [2022-04-06 06:08:34,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:34,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 06:08:34,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:34,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 06:08:34,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:08:34,668 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 06:08:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:34,678 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-04-06 06:08:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 06:08:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-06 06:08:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:34,679 INFO L225 Difference]: With dead ends: 36 [2022-04-06 06:08:34,679 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 06:08:34,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 06:08:34,680 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:34,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:08:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 06:08:34,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 06:08:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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) [2022-04-06 06:08:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-04-06 06:08:34,685 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-04-06 06:08:34,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:34,686 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-04-06 06:08:34,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 06:08:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-04-06 06:08:34,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 06:08:34,686 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:34,687 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:34,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 06:08:34,899 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 [2022-04-06 06:08:34,900 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2022-04-06 06:08:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:34,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147435359] [2022-04-06 06:08:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:34,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:08:34,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464580372] [2022-04-06 06:08:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:34,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:34,916 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) [2022-04-06 06:08:34,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 06:08:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:34,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:08:34,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:08:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:35,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:08:35,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:35,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147435359] [2022-04-06 06:08:35,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:08:35,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464580372] [2022-04-06 06:08:35,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464580372] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:35,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:35,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:08:35,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369095920] [2022-04-06 06:08:35,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:35,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:08:35,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:35,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:08:35,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:08:35,033 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 06:08:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:35,049 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2022-04-06 06:08:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:08:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-04-06 06:08:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:35,051 INFO L225 Difference]: With dead ends: 40 [2022-04-06 06:08:35,051 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 06:08:35,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:08:35,052 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:35,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 120 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 06:08:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 06:08:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-04-06 06:08:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-04-06 06:08:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-04-06 06:08:35,061 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-04-06 06:08:35,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:35,062 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-04-06 06:08:35,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 06:08:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-04-06 06:08:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 06:08:35,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:35,062 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:35,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 06:08:35,271 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 [2022-04-06 06:08:35,272 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2022-04-06 06:08:35,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:35,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319849640] [2022-04-06 06:08:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:35,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:35,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:08:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:35,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:08:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319849640] [2022-04-06 06:08:35,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319849640] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:35,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:35,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 06:08:35,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904642388] [2022-04-06 06:08:35,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:35,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 06:08:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 06:08:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 06:08:35,495 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:08:38,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:42,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:08:44,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:47,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:50,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:08:52,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:08:54,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:55,289 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-04-06 06:08:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 06:08:55,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-04-06 06:08:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:55,291 INFO L225 Difference]: With dead ends: 53 [2022-04-06 06:08:55,292 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 06:08:55,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:08:55,293 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 24 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 37 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:55,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 107 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 201 Invalid, 7 Unknown, 0 Unchecked, 19.7s Time] [2022-04-06 06:08:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 06:08:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 06:08:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 06:08:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-04-06 06:08:55,300 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-04-06 06:08:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:55,300 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-04-06 06:08:55,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:08:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-04-06 06:08:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:08:55,301 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:55,301 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:55,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 06:08:55,301 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:55,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885951, now seen corresponding path program 1 times [2022-04-06 06:08:55,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:55,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224388093] [2022-04-06 06:08:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:55,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:55,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:08:55,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126444998] [2022-04-06 06:08:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:55,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:55,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:55,310 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) [2022-04-06 06:08:55,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 06:08:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:08:55,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:08:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:55,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:08:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:08:55,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:55,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224388093] [2022-04-06 06:08:55,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:08:55,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126444998] [2022-04-06 06:08:55,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126444998] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:08:55,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:08:55,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 06:08:55,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622364944] [2022-04-06 06:08:55,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:08:55,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 06:08:55,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 06:08:55,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 06:08:55,504 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 06:08:58,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:59,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:59,735 INFO L93 Difference]: Finished difference Result 85 states and 114 transitions. [2022-04-06 06:08:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 06:08:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-04-06 06:08:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:59,737 INFO L225 Difference]: With dead ends: 85 [2022-04-06 06:08:59,737 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 06:08:59,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 06:08:59,738 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 76 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:59,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 177 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 06:08:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 06:08:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-04-06 06:08:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 06:08:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-04-06 06:08:59,745 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 23 [2022-04-06 06:08:59,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:59,745 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-04-06 06:08:59,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 06:08:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-04-06 06:08:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 06:08:59,746 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:59,746 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:59,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 06:08:59,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:59,947 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:59,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:59,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1731080004, now seen corresponding path program 1 times [2022-04-06 06:08:59,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:59,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902258629] [2022-04-06 06:08:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:59,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:59,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:08:59,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702567442] [2022-04-06 06:08:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:59,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:59,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:59,972 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) [2022-04-06 06:08:59,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 06:09:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:00,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:09:00,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:09:00,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:09:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:09:00,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:00,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902258629] [2022-04-06 06:09:00,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:09:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702567442] [2022-04-06 06:09:00,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702567442] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:09:00,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:09:00,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 06:09:00,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669080088] [2022-04-06 06:09:00,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:09:00,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 06:09:00,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:00,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 06:09:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 06:09:00,127 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 06:09:03,145 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 [] [2022-04-06 06:09:06,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:08,034 INFO L93 Difference]: Finished difference Result 99 states and 130 transitions. [2022-04-06 06:09:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 06:09:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-04-06 06:09:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:08,036 INFO L225 Difference]: With dead ends: 99 [2022-04-06 06:09:08,036 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 06:09:08,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:09:08,037 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 82 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 32 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:08,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 289 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 83 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-04-06 06:09:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 06:09:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-04-06 06:09:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 06:09:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-04-06 06:09:08,045 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 24 [2022-04-06 06:09:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:08,045 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-04-06 06:09:08,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 06:09:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-04-06 06:09:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 06:09:08,046 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:08,046 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:09:08,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 06:09:08,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:08,259 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1729947946, now seen corresponding path program 1 times [2022-04-06 06:09:08,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:08,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259788469] [2022-04-06 06:09:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:08,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:08,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:09:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:08,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:09:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:09:08,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:08,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259788469] [2022-04-06 06:09:08,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259788469] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 06:09:08,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799516615] [2022-04-06 06:09:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:08,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:08,434 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) [2022-04-06 06:09:08,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 06:09:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:08,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 06:09:08,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:09:08,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:09:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:09:08,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799516615] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:09:08,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 06:09:08,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-04-06 06:09:08,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069672696] [2022-04-06 06:09:08,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 06:09:08,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 06:09:08,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:08,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 06:09:08,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-06 06:09:08,716 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:09:12,987 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 [] [2022-04-06 06:09:14,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:18,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:20,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:23,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:31,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.51s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:34,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:35,404 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2022-04-06 06:09:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 06:09:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-04-06 06:09:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:35,406 INFO L225 Difference]: With dead ends: 130 [2022-04-06 06:09:35,406 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 06:09:35,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-04-06 06:09:35,407 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 66 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 168 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:35,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 174 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 559 Invalid, 7 Unknown, 0 Unchecked, 26.6s Time] [2022-04-06 06:09:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 06:09:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2022-04-06 06:09:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 75 states have internal predecessors, (86), 39 states have call successors, (39), 11 states have call predecessors, (39), 10 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 06:09:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2022-04-06 06:09:35,417 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 24 [2022-04-06 06:09:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:35,417 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2022-04-06 06:09:35,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:09:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2022-04-06 06:09:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 06:09:35,418 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:35,418 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-04-06 06:09:35,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 06:09:35,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:35,628 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2026335537, now seen corresponding path program 1 times [2022-04-06 06:09:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:35,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623692977] [2022-04-06 06:09:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:35,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:35,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:09:35,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016656494] [2022-04-06 06:09:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:35,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:35,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:35,656 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) [2022-04-06 06:09:35,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 06:09:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:35,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:09:35,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:09:35,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:09:35,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:35,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623692977] [2022-04-06 06:09:35,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:09:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016656494] [2022-04-06 06:09:35,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016656494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:35,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:35,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:09:35,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28211643] [2022-04-06 06:09:35,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:35,892 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:09:35,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:35,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:09:35,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:09:35,893 INFO L87 Difference]: Start difference. First operand 119 states and 160 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, (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) [2022-04-06 06:09:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:36,418 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2022-04-06 06:09:36,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:09:36,419 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, (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 31 [2022-04-06 06:09:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:36,420 INFO L225 Difference]: With dead ends: 123 [2022-04-06 06:09:36,420 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 06:09:36,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:09:36,420 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:36,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 154 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 06:09:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 06:09:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-04-06 06:09:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.25) internal successors, (75), 65 states have internal predecessors, (75), 32 states have call successors, (32), 9 states have call predecessors, (32), 8 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 06:09:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 136 transitions. [2022-04-06 06:09:36,427 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 136 transitions. Word has length 31 [2022-04-06 06:09:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:36,427 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 136 transitions. [2022-04-06 06:09:36,427 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, (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) [2022-04-06 06:09:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 136 transitions. [2022-04-06 06:09:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 06:09:36,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:36,428 INFO L499 BasicCegarLoop]: trace histogram [3, 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] [2022-04-06 06:09:36,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 06:09:36,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:36,634 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash -266035918, now seen corresponding path program 1 times [2022-04-06 06:09:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:36,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976377610] [2022-04-06 06:09:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:36,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:36,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:09:36,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116643230] [2022-04-06 06:09:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:36,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:36,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:36,647 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) [2022-04-06 06:09:36,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 06:09:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:36,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:09:36,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 06:09:36,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:09:36,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976377610] [2022-04-06 06:09:36,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:09:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116643230] [2022-04-06 06:09:36,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116643230] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:36,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:36,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:09:36,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798216367] [2022-04-06 06:09:36,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:36,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:09:36,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:09:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:09:36,800 INFO L87 Difference]: Start difference. First operand 101 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 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) [2022-04-06 06:09:37,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:37,467 INFO L93 Difference]: Finished difference Result 117 states and 147 transitions. [2022-04-06 06:09:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:09:37,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 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 34 [2022-04-06 06:09:37,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:37,469 INFO L225 Difference]: With dead ends: 117 [2022-04-06 06:09:37,469 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 06:09:37,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:09:37,470 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:37,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 06:09:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 06:09:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2022-04-06 06:09:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 70 states have internal predecessors, (76), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 06:09:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2022-04-06 06:09:37,476 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 34 [2022-04-06 06:09:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:37,476 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2022-04-06 06:09:37,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 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) [2022-04-06 06:09:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2022-04-06 06:09:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 06:09:37,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:37,477 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:09:37,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 06:09:37,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:37,700 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1209382940, now seen corresponding path program 1 times [2022-04-06 06:09:37,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:37,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136432438] [2022-04-06 06:09:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:37,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:37,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:09:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:37,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:09:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:09:37,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:37,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136432438] [2022-04-06 06:09:37,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136432438] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 06:09:37,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083754303] [2022-04-06 06:09:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:37,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:37,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:37,778 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) [2022-04-06 06:09:37,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 06:09:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:37,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 06:09:37,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:09:37,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:09:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 06:09:37,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083754303] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:09:37,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 06:09:37,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-04-06 06:09:37,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015211533] [2022-04-06 06:09:37,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 06:09:37,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 06:09:37,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:37,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 06:09:37,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-04-06 06:09:37,946 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:09:41,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:43,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:45,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:47,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:50,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:53,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:56,786 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 [] [2022-04-06 06:09:56,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:56,838 INFO L93 Difference]: Finished difference Result 144 states and 178 transitions. [2022-04-06 06:09:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 06:09:56,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-04-06 06:09:56,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:56,840 INFO L225 Difference]: With dead ends: 144 [2022-04-06 06:09:56,840 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 06:09:56,840 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-04-06 06:09:56,841 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 62 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 40 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:56,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 142 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 221 Invalid, 5 Unknown, 0 Unchecked, 18.8s Time] [2022-04-06 06:09:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 06:09:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2022-04-06 06:09:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 86 states have internal predecessors, (95), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 06:09:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 172 transitions. [2022-04-06 06:09:56,848 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 172 transitions. Word has length 32 [2022-04-06 06:09:56,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:56,848 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 172 transitions. [2022-04-06 06:09:56,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:09:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 172 transitions. [2022-04-06 06:09:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 06:09:56,849 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:56,849 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:09:56,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 06:09:57,065 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,SelfDestructingSolverStorable9 [2022-04-06 06:09:57,065 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:57,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash -55903719, now seen corresponding path program 2 times [2022-04-06 06:09:57,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:57,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613870211] [2022-04-06 06:09:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:57,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:57,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:09:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:09:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 06:09:57,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:57,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613870211] [2022-04-06 06:09:57,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613870211] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:57,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:57,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 06:09:57,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4787376] [2022-04-06 06:09:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:57,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 06:09:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 06:09:57,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:09:57,133 INFO L87 Difference]: Start difference. First operand 138 states and 172 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:10:04,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.96s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:10:10,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.89s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:10:15,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.90s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:10:21,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.90s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:10:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:10:22,467 INFO L93 Difference]: Finished difference Result 137 states and 169 transitions. [2022-04-06 06:10:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 06:10:22,467 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-04-06 06:10:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:10:22,468 INFO L225 Difference]: With dead ends: 137 [2022-04-06 06:10:22,468 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 06:10:22,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 06:10:22,469 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2022-04-06 06:10:22,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 106 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 4 Unknown, 0 Unchecked, 25.3s Time] [2022-04-06 06:10:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 06:10:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-04-06 06:10:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 78 states have internal predecessors, (86), 39 states have call successors, (39), 16 states have call predecessors, (39), 15 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 06:10:22,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2022-04-06 06:10:22,475 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 35 [2022-04-06 06:10:22,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:10:22,475 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2022-04-06 06:10:22,475 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 06:10:22,475 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2022-04-06 06:10:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 06:10:22,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:10:22,477 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1] [2022-04-06 06:10:22,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 06:10:22,477 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:10:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:10:22,477 INFO L85 PathProgramCache]: Analyzing trace with hash -926681017, now seen corresponding path program 1 times [2022-04-06 06:10:22,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:10:22,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171352986] [2022-04-06 06:10:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:10:22,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:10:22,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:10:22,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867311218] [2022-04-06 06:10:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:10:22,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:10:22,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:10:22,485 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) [2022-04-06 06:10:22,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process