/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_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:44:31,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:44:31,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:44:31,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:44:31,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:44:31,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:44:31,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:44:31,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:44:31,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:44:31,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:44:31,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:44:31,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:44:31,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:44:31,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:44:31,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:44:31,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:44:31,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:44:31,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:44:31,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:44:31,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:44:31,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:44:31,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:44:31,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:44:31,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:44:31,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 13:44:31,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 13:44:31,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 13:44:31,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 13:44:31,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 13:44:31,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 13:44:31,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 13:44:31,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 13:44:31,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 13:44:31,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 13:44:31,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 13:44:31,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 13:44:31,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 13:44:31,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 13:44:31,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:44:31,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:44:31,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:44:31,638 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:44:31,647 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:44:31,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:44:31,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:44:31,648 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:44:31,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:44:31,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:44:31,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:44:31,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:44:31,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:44:31,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:44:31,649 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:44:31,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:44:31,650 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:44:31,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:44:31,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:44:31,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:44:31,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:44:31,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:44:31,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:44:31,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:44:31,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:44:31,651 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:44:31,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:44:31,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:44:31,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:44:31,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:44:31,940 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:44:31,943 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:44:31,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2022-01-31 13:44:32,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21a0cc081/0a0182c78bbe44d9a579bd2b788d6b9f/FLAG6b5d437c2 [2022-01-31 13:44:32,402 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:44:32,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2022-01-31 13:44:32,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21a0cc081/0a0182c78bbe44d9a579bd2b788d6b9f/FLAG6b5d437c2 [2022-01-31 13:44:32,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21a0cc081/0a0182c78bbe44d9a579bd2b788d6b9f [2022-01-31 13:44:32,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:44:32,814 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:44:32,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:44:32,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:44:32,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:44:32,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:44:32" (1/1) ... [2022-01-31 13:44:32,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b1cc419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:32, skipping insertion in model container [2022-01-31 13:44:32,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:44:32" (1/1) ... [2022-01-31 13:44:32,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:44:32,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:44:32,972 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_unwindbound10.c[525,538] [2022-01-31 13:44:33,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:44:33,013 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:44:33,024 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_unwindbound10.c[525,538] [2022-01-31 13:44:33,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:44:33,064 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:44:33,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33 WrapperNode [2022-01-31 13:44:33,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:44:33,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:44:33,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:44:33,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:44:33,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33" (1/1) ... [2022-01-31 13:44:33,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33" (1/1) ... [2022-01-31 13:44:33,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33" (1/1) ... [2022-01-31 13:44:33,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33" (1/1) ... [2022-01-31 13:44:33,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33" (1/1) ... [2022-01-31 13:44:33,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33" (1/1) ... [2022-01-31 13:44:33,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33" (1/1) ... [2022-01-31 13:44:33,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:44:33,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:44:33,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:44:33,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:44:33,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33" (1/1) ... [2022-01-31 13:44:33,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:44:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:44:33,144 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) [2022-01-31 13:44:33,171 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 [2022-01-31 13:44:33,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:44:33,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:44:33,182 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:44:33,182 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 13:44:33,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:44:33,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:44:33,183 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 13:44:33,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:44:33,183 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:44:33,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:44:33,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 13:44:33,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 13:44:33,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:44:33,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:44:33,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:44:33,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:44:33,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:44:33,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:44:33,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:44:33,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:44:33,246 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:44:33,247 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:44:33,445 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:44:33,450 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:44:33,450 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 13:44:33,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:44:33 BoogieIcfgContainer [2022-01-31 13:44:33,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:44:33,452 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:44:33,453 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:44:33,459 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:44:33,462 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:44:33" (1/1) ... [2022-01-31 13:44:33,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:44:33 BasicIcfg [2022-01-31 13:44:33,500 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:44:33,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:44:33,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:44:33,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:44:33,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:44:32" (1/4) ... [2022-01-31 13:44:33,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671a7e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:44:33, skipping insertion in model container [2022-01-31 13:44:33,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:44:33" (2/4) ... [2022-01-31 13:44:33,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671a7e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:44:33, skipping insertion in model container [2022-01-31 13:44:33,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:44:33" (3/4) ... [2022-01-31 13:44:33,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671a7e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:44:33, skipping insertion in model container [2022-01-31 13:44:33,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:44:33" (4/4) ... [2022-01-31 13:44:33,505 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound10.cJordan [2022-01-31 13:44:33,509 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:44:33,509 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:44:33,542 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:44:33,547 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 13:44:33,547 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:44:33,556 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) [2022-01-31 13:44:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 13:44:33,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:44:33,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:44:33,563 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:44:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:44:33,567 INFO L85 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2022-01-31 13:44:33,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:44:33,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022349696] [2022-01-31 13:44:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:33,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:44:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:33,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:44:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:33,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:44:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:44:33,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:44:33,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022349696] [2022-01-31 13:44:33,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022349696] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:44:33,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:44:33,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:44:33,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973322393] [2022-01-31 13:44:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:44:33,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:44:33,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:44:33,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:44:33,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:44:33,780 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) [2022-01-31 13:44:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:44:34,489 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-01-31 13:44:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:44:34,492 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 [2022-01-31 13:44:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:44:34,498 INFO L225 Difference]: With dead ends: 40 [2022-01-31 13:44:34,498 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 13:44:34,499 INFO L932 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 [2022-01-31 13:44:34,502 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 13:44:34,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 13:44:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 13:44:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-01-31 13:44:34,541 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) [2022-01-31 13:44:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-01-31 13:44:34,544 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-01-31 13:44:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:44:34,545 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-01-31 13:44:34,545 INFO L471 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) [2022-01-31 13:44:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-01-31 13:44:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 13:44:34,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:44:34,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:44:34,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:44:34,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:44:34,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:44:34,550 INFO L85 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2022-01-31 13:44:34,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:44:34,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253649772] [2022-01-31 13:44:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:34,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:44:34,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:44:34,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927611804] [2022-01-31 13:44:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:34,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:44:34,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:44:34,588 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) [2022-01-31 13:44:34,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 13:44:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:34,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 13:44:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:44:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:44:34,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:44:34,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:44:34,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253649772] [2022-01-31 13:44:34,715 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:44:34,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927611804] [2022-01-31 13:44:34,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927611804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:44:34,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:44:34,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 13:44:34,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556119123] [2022-01-31 13:44:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:44:34,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 13:44:34,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:44:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 13:44:34,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 13:44:34,718 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) [2022-01-31 13:44:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:44:34,731 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-01-31 13:44:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 13:44:34,731 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 [2022-01-31 13:44:34,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:44:34,732 INFO L225 Difference]: With dead ends: 36 [2022-01-31 13:44:34,732 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 13:44:34,733 INFO L932 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 [2022-01-31 13:44:34,734 INFO L933 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 [2022-01-31 13:44:34,735 INFO L934 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] [2022-01-31 13:44:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 13:44:34,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 13:44:34,740 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) [2022-01-31 13:44:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-01-31 13:44:34,741 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-01-31 13:44:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:44:34,742 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-01-31 13:44:34,742 INFO L471 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) [2022-01-31 13:44:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-01-31 13:44:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 13:44:34,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:44:34,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:44:34,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 13:44:34,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:44:34,944 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:44:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:44:34,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2022-01-31 13:44:34,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:44:34,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054842671] [2022-01-31 13:44:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:34,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:44:34,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:44:34,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887892174] [2022-01-31 13:44:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:34,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:44:34,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:44:34,965 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) [2022-01-31 13:44:34,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 13:44:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:35,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:44:35,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:44:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:44:35,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:44:35,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:44:35,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054842671] [2022-01-31 13:44:35,068 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:44:35,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887892174] [2022-01-31 13:44:35,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887892174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:44:35,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:44:35,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:44:35,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121962128] [2022-01-31 13:44:35,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:44:35,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:44:35,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:44:35,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:44:35,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:44:35,070 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) [2022-01-31 13:44:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:44:35,090 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2022-01-31 13:44:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:44:35,090 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 [2022-01-31 13:44:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:44:35,091 INFO L225 Difference]: With dead ends: 40 [2022-01-31 13:44:35,091 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 13:44:35,092 INFO L932 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 [2022-01-31 13:44:35,093 INFO L933 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 [2022-01-31 13:44:35,093 INFO L934 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] [2022-01-31 13:44:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 13:44:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-31 13:44:35,098 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) [2022-01-31 13:44:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-01-31 13:44:35,099 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-01-31 13:44:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:44:35,099 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-01-31 13:44:35,099 INFO L471 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) [2022-01-31 13:44:35,100 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-01-31 13:44:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 13:44:35,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:44:35,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:44:35,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 13:44:35,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 13:44:35,309 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:44:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:44:35,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2022-01-31 13:44:35,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:44:35,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524705065] [2022-01-31 13:44:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:35,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:44:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:35,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:44:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:35,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:44:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:35,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:44:35,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:44:35,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524705065] [2022-01-31 13:44:35,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524705065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:44:35,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:44:35,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 13:44:35,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981939520] [2022-01-31 13:44:35,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:44:35,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 13:44:35,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:44:35,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 13:44:35,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 13:44:35,513 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) [2022-01-31 13:44:40,633 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 [] [2022-01-31 13:44:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:44:41,504 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-01-31 13:44:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 13:44:41,504 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 [2022-01-31 13:44:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:44:41,506 INFO L225 Difference]: With dead ends: 53 [2022-01-31 13:44:41,506 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 13:44:41,506 INFO L932 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 [2022-01-31 13:44:41,507 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 24 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-01-31 13:44:41,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 148 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-01-31 13:44:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 13:44:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-31 13:44:41,515 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) [2022-01-31 13:44:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-01-31 13:44:41,516 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-01-31 13:44:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:44:41,516 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-01-31 13:44:41,517 INFO L471 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) [2022-01-31 13:44:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-01-31 13:44:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 13:44:41,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:44:41,518 INFO L514 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] [2022-01-31 13:44:41,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 13:44:41,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:44:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:44:41,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885951, now seen corresponding path program 1 times [2022-01-31 13:44:41,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:44:41,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80119356] [2022-01-31 13:44:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:41,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:44:41,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:44:41,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135508166] [2022-01-31 13:44:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:41,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:44:41,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:44:41,536 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) [2022-01-31 13:44:41,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 13:44:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:41,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:44:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:44:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:44:41,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:44:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:44:41,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:44:41,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80119356] [2022-01-31 13:44:41,768 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:44:41,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135508166] [2022-01-31 13:44:41,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135508166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:44:41,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:44:41,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 13:44:41,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95434682] [2022-01-31 13:44:41,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:44:41,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:44:41,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:44:41,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:44:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:44:41,772 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) [2022-01-31 13:44:44,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:44:46,185 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:44:48,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:44:50,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:44:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:44:51,389 INFO L93 Difference]: Finished difference Result 85 states and 114 transitions. [2022-01-31 13:44:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 13:44:51,390 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 [2022-01-31 13:44:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:44:51,391 INFO L225 Difference]: With dead ends: 85 [2022-01-31 13:44:51,391 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 13:44:51,392 INFO L932 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 [2022-01-31 13:44:51,393 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 76 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 29 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-01-31 13:44:51,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 177 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 45 Invalid, 4 Unknown, 0 Unchecked, 9.6s Time] [2022-01-31 13:44:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 13:44:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-01-31 13:44:51,401 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) [2022-01-31 13:44:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-01-31 13:44:51,402 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 23 [2022-01-31 13:44:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:44:51,403 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-01-31 13:44:51,403 INFO L471 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) [2022-01-31 13:44:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-01-31 13:44:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 13:44:51,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:44:51,404 INFO L514 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] [2022-01-31 13:44:51,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 13:44:51,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:44:51,616 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:44:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:44:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1731080004, now seen corresponding path program 1 times [2022-01-31 13:44:51,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:44:51,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710789063] [2022-01-31 13:44:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:51,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:44:51,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:44:51,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609941010] [2022-01-31 13:44:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:44:51,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:44:51,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:44:51,628 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) [2022-01-31 13:44:51,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 13:44:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:44:51,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 13:44:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:44:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:44:51,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:44:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:44:51,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:44:51,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710789063] [2022-01-31 13:44:51,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:44:51,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609941010] [2022-01-31 13:44:51,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609941010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:44:51,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:44:51,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-31 13:44:51,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129711234] [2022-01-31 13:44:51,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:44:51,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 13:44:51,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:44:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 13:44:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:44:51,865 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2022-01-31 13:44:54,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:44:57,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:45:00,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:45:02,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:06,128 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 [] [2022-01-31 13:45:07,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:45:07,503 INFO L93 Difference]: Finished difference Result 129 states and 178 transitions. [2022-01-31 13:45:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 13:45:07,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 [2022-01-31 13:45:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:45:07,506 INFO L225 Difference]: With dead ends: 129 [2022-01-31 13:45:07,506 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 13:45:07,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:45:07,507 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 143 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 58 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-01-31 13:45:07,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 331 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 131 Invalid, 5 Unknown, 0 Unchecked, 15.6s Time] [2022-01-31 13:45:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 13:45:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2022-01-31 13:45:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 70 states have internal predecessors, (87), 46 states have call successors, (46), 9 states have call predecessors, (46), 8 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-01-31 13:45:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2022-01-31 13:45:07,529 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 24 [2022-01-31 13:45:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:45:07,530 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2022-01-31 13:45:07,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2022-01-31 13:45:07,530 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2022-01-31 13:45:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 13:45:07,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:07,531 INFO L514 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] [2022-01-31 13:45:07,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 13:45:07,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:07,756 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1729947946, now seen corresponding path program 1 times [2022-01-31 13:45:07,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:07,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259040580] [2022-01-31 13:45:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:07,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:07,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:45:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:45:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:45:07,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:45:07,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259040580] [2022-01-31 13:45:07,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259040580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:45:07,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370829313] [2022-01-31 13:45:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:07,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:07,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:45:07,960 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) [2022-01-31 13:45:07,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 13:45:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:08,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 13:45:08,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:45:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:45:08,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:45:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:45:08,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370829313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:45:08,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:45:08,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-31 13:45:08,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485204939] [2022-01-31 13:45:08,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:45:08,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 13:45:08,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:45:08,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 13:45:08,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-31 13:45:08,363 INFO L87 Difference]: Start difference. First operand 120 states and 173 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) [2022-01-31 13:45:12,052 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 [] [2022-01-31 13:45:14,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:16,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:18,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:21,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:22,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:27,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:30,018 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 [] [2022-01-31 13:45:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:45:30,736 INFO L93 Difference]: Finished difference Result 181 states and 265 transitions. [2022-01-31 13:45:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 13:45:30,737 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 [2022-01-31 13:45:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:45:30,738 INFO L225 Difference]: With dead ends: 181 [2022-01-31 13:45:30,738 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 13:45:30,739 INFO L932 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 [2022-01-31 13:45:30,740 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 60 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 154 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:45:30,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 276 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 420 Invalid, 6 Unknown, 0 Unchecked, 22.3s Time] [2022-01-31 13:45:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 13:45:30,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2022-01-31 13:45:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 97 states have internal predecessors, (114), 65 states have call successors, (65), 12 states have call predecessors, (65), 11 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2022-01-31 13:45:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 236 transitions. [2022-01-31 13:45:30,759 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 236 transitions. Word has length 24 [2022-01-31 13:45:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:45:30,759 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 236 transitions. [2022-01-31 13:45:30,759 INFO L471 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) [2022-01-31 13:45:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 236 transitions. [2022-01-31 13:45:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 13:45:30,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:30,760 INFO L514 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] [2022-01-31 13:45:30,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 13:45:30,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:30,976 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:30,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2026335537, now seen corresponding path program 1 times [2022-01-31 13:45:30,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:30,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117500784] [2022-01-31 13:45:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:30,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:30,984 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:45:30,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827674693] [2022-01-31 13:45:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:30,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:30,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:45:30,988 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) [2022-01-31 13:45:31,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 13:45:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:31,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 13:45:31,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:45:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:45:31,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:45:31,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:45:31,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117500784] [2022-01-31 13:45:31,250 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:45:31,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827674693] [2022-01-31 13:45:31,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827674693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:45:31,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:45:31,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:45:31,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464303643] [2022-01-31 13:45:31,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:45:31,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:45:31,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:45:31,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:45:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:45:31,252 INFO L87 Difference]: Start difference. First operand 166 states and 236 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) [2022-01-31 13:45:33,601 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 [] [2022-01-31 13:45:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:45:34,085 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2022-01-31 13:45:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:45:34,087 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 [2022-01-31 13:45:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:45:34,089 INFO L225 Difference]: With dead ends: 170 [2022-01-31 13:45:34,089 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 13:45:34,089 INFO L932 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 [2022-01-31 13:45:34,090 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 13:45:34,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 13:45:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 13:45:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-01-31 13:45:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.2875) internal successors, (103), 87 states have internal predecessors, (103), 58 states have call successors, (58), 10 states have call predecessors, (58), 9 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 13:45:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 212 transitions. [2022-01-31 13:45:34,103 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 212 transitions. Word has length 31 [2022-01-31 13:45:34,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:45:34,103 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 212 transitions. [2022-01-31 13:45:34,104 INFO L471 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) [2022-01-31 13:45:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 212 transitions. [2022-01-31 13:45:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 13:45:34,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:34,105 INFO L514 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] [2022-01-31 13:45:34,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 13:45:34,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:34,309 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash -266035918, now seen corresponding path program 1 times [2022-01-31 13:45:34,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:34,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379367878] [2022-01-31 13:45:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:34,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:34,318 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:45:34,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528431705] [2022-01-31 13:45:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:34,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:34,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:45:34,320 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) [2022-01-31 13:45:34,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 13:45:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:34,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:45:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:45:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 13:45:34,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:45:34,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:45:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379367878] [2022-01-31 13:45:34,555 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:45:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528431705] [2022-01-31 13:45:34,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528431705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:45:34,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:45:34,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:45:34,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092126409] [2022-01-31 13:45:34,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:45:34,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:45:34,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:45:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:45:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:45:34,557 INFO L87 Difference]: Start difference. First operand 148 states and 212 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) [2022-01-31 13:45:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:45:35,099 INFO L93 Difference]: Finished difference Result 172 states and 230 transitions. [2022-01-31 13:45:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:45:35,100 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 [2022-01-31 13:45:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:45:35,101 INFO L225 Difference]: With dead ends: 172 [2022-01-31 13:45:35,101 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 13:45:35,101 INFO L932 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 [2022-01-31 13:45:35,102 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 13:45:35,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 172 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 13:45:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 13:45:35,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2022-01-31 13:45:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 91 states have (on average 1.1758241758241759) internal successors, (107), 95 states have internal predecessors, (107), 55 states have call successors, (55), 16 states have call predecessors, (55), 15 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 13:45:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 213 transitions. [2022-01-31 13:45:35,114 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 213 transitions. Word has length 34 [2022-01-31 13:45:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:45:35,115 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 213 transitions. [2022-01-31 13:45:35,115 INFO L471 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) [2022-01-31 13:45:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 213 transitions. [2022-01-31 13:45:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 13:45:35,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:35,119 INFO L514 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] [2022-01-31 13:45:35,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 13:45:35,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:35,320 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1209382940, now seen corresponding path program 1 times [2022-01-31 13:45:35,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:35,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524315973] [2022-01-31 13:45:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:35,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:35,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:45:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:35,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:45:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:45:35,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:45:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524315973] [2022-01-31 13:45:35,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524315973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:45:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8675527] [2022-01-31 13:45:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:35,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:35,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:45:35,421 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) [2022-01-31 13:45:35,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 13:45:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:35,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 13:45:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:45:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:45:35,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:45:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:45:35,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8675527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:45:35,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:45:35,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-01-31 13:45:35,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678214471] [2022-01-31 13:45:35,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:45:35,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 13:45:35,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:45:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 13:45:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 13:45:35,712 INFO L87 Difference]: Start difference. First operand 162 states and 213 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:45:38,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:45:40,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:42,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:44,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:49,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:51,047 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:55,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:58,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:46:00,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:46:03,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:46:06,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.54s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:46:10,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:46:12,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:46:14,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:46:17,061 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:46:19,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:46:20,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:46:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:46:22,661 INFO L93 Difference]: Finished difference Result 367 states and 477 transitions. [2022-01-31 13:46:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 13:46:22,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-01-31 13:46:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:46:22,664 INFO L225 Difference]: With dead ends: 367 [2022-01-31 13:46:22,664 INFO L226 Difference]: Without dead ends: 367 [2022-01-31 13:46:22,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2022-01-31 13:46:22,665 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 225 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 169 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.7s IncrementalHoareTripleChecker+Time [2022-01-31 13:46:22,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 175 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 479 Invalid, 14 Unknown, 0 Unchecked, 46.7s Time] [2022-01-31 13:46:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-31 13:46:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 351. [2022-01-31 13:46:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 206 states have internal predecessors, (233), 121 states have call successors, (121), 35 states have call predecessors, (121), 34 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2022-01-31 13:46:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 466 transitions. [2022-01-31 13:46:22,688 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 466 transitions. Word has length 32 [2022-01-31 13:46:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:46:22,688 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 466 transitions. [2022-01-31 13:46:22,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 13:46:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 466 transitions. [2022-01-31 13:46:22,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 13:46:22,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:46:22,690 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:46:22,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 13:46:22,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 13:46:22,904 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:46:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:46:22,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1556551492, now seen corresponding path program 2 times [2022-01-31 13:46:22,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:46:22,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115648477] [2022-01-31 13:46:22,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:46:22,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:46:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:46:22,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:46:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:46:22,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:46:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:46:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-31 13:46:22,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:46:22,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115648477] [2022-01-31 13:46:22,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115648477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:46:22,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:46:22,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 13:46:22,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164097218] [2022-01-31 13:46:22,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:46:22,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 13:46:22,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:46:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 13:46:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:46:22,999 INFO L87 Difference]: Start difference. First operand 351 states and 466 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) [2022-01-31 13:46:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:46:25,315 INFO L93 Difference]: Finished difference Result 350 states and 463 transitions. [2022-01-31 13:46:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:46:25,315 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 50 [2022-01-31 13:46:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:46:25,317 INFO L225 Difference]: With dead ends: 350 [2022-01-31 13:46:25,318 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 13:46:25,318 INFO L932 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 [2022-01-31 13:46:25,318 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:46:25,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 106 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 13:46:25,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 13:46:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 343. [2022-01-31 13:46:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 188 states have (on average 1.1914893617021276) internal successors, (224), 198 states have internal predecessors, (224), 120 states have call successors, (120), 35 states have call predecessors, (120), 34 states have return successors, (111), 109 states have call predecessors, (111), 111 states have call successors, (111) [2022-01-31 13:46:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 455 transitions. [2022-01-31 13:46:25,356 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 455 transitions. Word has length 50 [2022-01-31 13:46:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:46:25,356 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 455 transitions. [2022-01-31 13:46:25,356 INFO L471 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) [2022-01-31 13:46:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 455 transitions. [2022-01-31 13:46:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 13:46:25,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:46:25,358 INFO L514 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] [2022-01-31 13:46:25,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 13:46:25,358 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:46:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:46:25,359 INFO L85 PathProgramCache]: Analyzing trace with hash -926681017, now seen corresponding path program 1 times [2022-01-31 13:46:25,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:46:25,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343492194] [2022-01-31 13:46:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:46:25,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:46:25,376 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:46:25,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887617535] [2022-01-31 13:46:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:46:25,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:46:25,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:46:25,378 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) [2022-01-31 13:46:25,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process