/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/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 14:36:54,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 14:36:54,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 14:36:54,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 14:36:54,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 14:36:54,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 14:36:54,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 14:36:54,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 14:36:54,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 14:36:54,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 14:36:54,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 14:36:54,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 14:36:54,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 14:36:54,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 14:36:54,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 14:36:54,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 14:36:54,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 14:36:54,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 14:36:54,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 14:36:54,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 14:36:54,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 14:36:54,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 14:36:54,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 14:36:54,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 14:36:54,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 14:36:54,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 14:36:54,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 14:36:54,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 14:36:54,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 14:36:54,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 14:36:54,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 14:36:54,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 14:36:54,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 14:36:54,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 14:36:54,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 14:36:54,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 14:36:54,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 14:36:54,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 14:36:54,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 14:36:54,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 14:36:54,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 14:36:54,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 14:36:54,526 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 14:36:54,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 14:36:54,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 14:36:54,527 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 14:36:54,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 14:36:54,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 14:36:54,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 14:36:54,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 14:36:54,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 14:36:54,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 14:36:54,528 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 14:36:54,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 14:36:54,528 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 14:36:54,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 14:36:54,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 14:36:54,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 14:36:54,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 14:36:54,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 14:36:54,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:36:54,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 14:36:54,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 14:36:54,530 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 14:36:54,530 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 14:36:54,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 14:36:54,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 14:36:54,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 14:36:54,740 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 14:36:54,741 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 14:36:54,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-01-31 14:36:54,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6910cf393/180313dfaa474803886932bccf8fbf13/FLAGcc5610fb0 [2022-01-31 14:36:55,123 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 14:36:55,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-01-31 14:36:55,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6910cf393/180313dfaa474803886932bccf8fbf13/FLAGcc5610fb0 [2022-01-31 14:36:55,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6910cf393/180313dfaa474803886932bccf8fbf13 [2022-01-31 14:36:55,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 14:36:55,572 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 14:36:55,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 14:36:55,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 14:36:55,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 14:36:55,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6580a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55, skipping insertion in model container [2022-01-31 14:36:55,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 14:36:55,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 14:36:55,743 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/fermat2-ll_unwindbound100.c[524,537] [2022-01-31 14:36:55,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:36:55,788 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 14:36:55,800 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/fermat2-ll_unwindbound100.c[524,537] [2022-01-31 14:36:55,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:36:55,822 INFO L208 MainTranslator]: Completed translation [2022-01-31 14:36:55,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55 WrapperNode [2022-01-31 14:36:55,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 14:36:55,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 14:36:55,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 14:36:55,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 14:36:55,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 14:36:55,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 14:36:55,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 14:36:55,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 14:36:55,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55" (1/1) ... [2022-01-31 14:36:55,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:36:55,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:36:55,877 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 14:36:55,879 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 14:36:55,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 14:36:55,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 14:36:55,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 14:36:55,911 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 14:36:55,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 14:36:55,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 14:36:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 14:36:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 14:36:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 14:36:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 14:36:55,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 14:36:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 14:36:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 14:36:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 14:36:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 14:36:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 14:36:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 14:36:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 14:36:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 14:36:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 14:36:55,956 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 14:36:55,957 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 14:36:56,105 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 14:36:56,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 14:36:56,110 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 14:36:56,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:36:56 BoogieIcfgContainer [2022-01-31 14:36:56,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 14:36:56,111 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 14:36:56,112 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 14:36:56,114 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 14:36:56,116 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:36:56" (1/1) ... [2022-01-31 14:36:56,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:36:56 BasicIcfg [2022-01-31 14:36:56,130 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 14:36:56,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 14:36:56,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 14:36:56,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 14:36:56,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:36:55" (1/4) ... [2022-01-31 14:36:56,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668d7b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:36:56, skipping insertion in model container [2022-01-31 14:36:56,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:36:55" (2/4) ... [2022-01-31 14:36:56,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668d7b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:36:56, skipping insertion in model container [2022-01-31 14:36:56,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:36:56" (3/4) ... [2022-01-31 14:36:56,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668d7b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:36:56, skipping insertion in model container [2022-01-31 14:36:56,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:36:56" (4/4) ... [2022-01-31 14:36:56,135 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.cJordan [2022-01-31 14:36:56,139 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 14:36:56,139 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 14:36:56,167 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 14:36:56,171 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 14:36:56,171 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 14:36:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 14:36:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 14:36:56,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:36:56,184 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:36:56,184 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:36:56,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:36:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2022-01-31 14:36:56,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:36:56,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933550045] [2022-01-31 14:36:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:56,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:36:56,247 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:36:56,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663225895] [2022-01-31 14:36:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:56,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:36:56,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:36:56,249 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 14:36:56,250 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 14:36:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:36:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-31 14:36:56,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:36:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 14:36:56,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:36:56,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:36:56,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933550045] [2022-01-31 14:36:56,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:36:56,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663225895] [2022-01-31 14:36:56,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663225895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:36:56,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:36:56,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-31 14:36:56,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528977334] [2022-01-31 14:36:56,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:36:56,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-31 14:36:56,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:36:56,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-31 14:36:56,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 14:36:56,382 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:36:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:36:56,391 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 14:36:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-31 14:36:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 14:36:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:36:56,396 INFO L225 Difference]: With dead ends: 30 [2022-01-31 14:36:56,396 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 14:36:56,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-31 14:36:56,399 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:36:56,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:36:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 14:36:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 14:36:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 14:36:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-01-31 14:36:56,420 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-01-31 14:36:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:36:56,420 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-01-31 14:36:56,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:36:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-01-31 14:36:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 14:36:56,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:36:56,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:36:56,440 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 14:36:56,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-31 14:36:56,638 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:36:56,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:36:56,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2022-01-31 14:36:56,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:36:56,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273745922] [2022-01-31 14:36:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:56,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:36:56,651 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:36:56,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695966509] [2022-01-31 14:36:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:56,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:36:56,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:36:56,653 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 14:36:56,654 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 14:36:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:36:56,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:36:56,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:36:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:36:56,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:36:56,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:36:56,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273745922] [2022-01-31 14:36:56,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:36:56,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695966509] [2022-01-31 14:36:56,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695966509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:36:56,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:36:56,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 14:36:56,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631863608] [2022-01-31 14:36:56,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:36:56,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 14:36:56,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:36:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 14:36:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 14:36:56,768 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:36:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:36:56,776 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-01-31 14:36:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 14:36:56,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-01-31 14:36:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:36:56,777 INFO L225 Difference]: With dead ends: 27 [2022-01-31 14:36:56,777 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 14:36:56,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 14:36:56,778 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:36:56,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:36:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 14:36:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 14:36:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 14:36:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 14:36:56,782 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-01-31 14:36:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:36:56,782 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 14:36:56,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 14:36:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 14:36:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 14:36:56,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:36:56,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:36:56,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 14:36:57,006 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,SelfDestructingSolverStorable1 [2022-01-31 14:36:57,006 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:36:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:36:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2022-01-31 14:36:57,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:36:57,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625317819] [2022-01-31 14:36:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:57,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:36:57,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:36:57,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532320742] [2022-01-31 14:36:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:57,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:36:57,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:36:57,030 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 14:36:57,031 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 14:36:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:36:57,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 14:36:57,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:36:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:36:57,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:36:57,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:36:57,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625317819] [2022-01-31 14:36:57,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:36:57,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532320742] [2022-01-31 14:36:57,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532320742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:36:57,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:36:57,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:36:57,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934411378] [2022-01-31 14:36:57,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:36:57,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:36:57,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:36:57,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:36:57,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:36:57,392 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 14:36:59,429 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 14:36:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:36:59,437 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-01-31 14:36:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:36:59,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-01-31 14:36:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:36:59,439 INFO L225 Difference]: With dead ends: 35 [2022-01-31 14:36:59,439 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 14:36:59,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 14:36:59,440 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:36:59,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 14:36:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 14:36:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-01-31 14:36:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 14:36:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-31 14:36:59,444 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-01-31 14:36:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:36:59,445 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-31 14:36:59,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 14:36:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-31 14:36:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 14:36:59,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:36:59,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:36:59,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 14:36:59,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:36:59,667 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:36:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:36:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2022-01-31 14:36:59,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:36:59,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502297077] [2022-01-31 14:36:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:59,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:36:59,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:36:59,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046416311] [2022-01-31 14:36:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:59,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:36:59,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:36:59,678 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 14:36:59,693 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 14:36:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:36:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 14:36:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:36:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:36:59,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:36:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:36:59,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:36:59,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502297077] [2022-01-31 14:36:59,948 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:36:59,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046416311] [2022-01-31 14:36:59,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046416311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:36:59,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:36:59,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-01-31 14:36:59,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912440604] [2022-01-31 14:36:59,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:36:59,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:36:59,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:36:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:36:59,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:36:59,950 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:37:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:37:00,007 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-01-31 14:37:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 14:37:00,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-01-31 14:37:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:37:00,008 INFO L225 Difference]: With dead ends: 37 [2022-01-31 14:37:00,008 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 14:37:00,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-31 14:37:00,010 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:37:00,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 112 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:37:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 14:37:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-31 14:37:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 14:37:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 14:37:00,013 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-01-31 14:37:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:37:00,013 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 14:37:00,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-31 14:37:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 14:37:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 14:37:00,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:37:00,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:37:00,030 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 14:37:00,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:00,227 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:37:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:37:00,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2022-01-31 14:37:00,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:37:00,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143940191] [2022-01-31 14:37:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:37:00,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:37:00,235 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:37:00,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619414424] [2022-01-31 14:37:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:37:00,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:00,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:37:00,236 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 14:37:00,237 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 14:37:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:37:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:37:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:37:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:37:00,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:37:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:37:00,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:37:00,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143940191] [2022-01-31 14:37:00,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:37:00,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619414424] [2022-01-31 14:37:00,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619414424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:37:00,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:37:00,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 14:37:00,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131336677] [2022-01-31 14:37:00,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:37:00,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 14:37:00,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:37:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 14:37:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 14:37:00,382 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 14:37:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:37:00,424 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-01-31 14:37:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 14:37:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2022-01-31 14:37:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:37:00,425 INFO L225 Difference]: With dead ends: 56 [2022-01-31 14:37:00,425 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 14:37:00,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 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 14:37:00,426 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:37:00,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 94 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:37:00,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 14:37:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 14:37:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 14:37:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-01-31 14:37:00,431 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2022-01-31 14:37:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:37:00,432 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-01-31 14:37:00,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 14:37:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-01-31 14:37:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 14:37:00,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:37:00,433 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:37:00,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 14:37:00,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:00,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:37:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:37:00,659 INFO L85 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 2 times [2022-01-31 14:37:00,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:37:00,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933148711] [2022-01-31 14:37:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:37:00,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:37:00,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:37:00,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742381925] [2022-01-31 14:37:00,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:37:00,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:00,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:37:00,693 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 14:37:00,695 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 14:37:00,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:37:00,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:37:00,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 14:37:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:37:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:37:00,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:37:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 14:37:01,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:37:01,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933148711] [2022-01-31 14:37:01,042 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:37:01,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742381925] [2022-01-31 14:37:01,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742381925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:37:01,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:37:01,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 14:37:01,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551430270] [2022-01-31 14:37:01,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:37:01,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 14:37:01,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:37:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 14:37:01,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:37:01,044 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-01-31 14:37:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:37:01,170 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-01-31 14:37:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 14:37:01,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-01-31 14:37:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:37:01,171 INFO L225 Difference]: With dead ends: 110 [2022-01-31 14:37:01,171 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 14:37:01,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-01-31 14:37:01,172 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 102 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:37:01,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 142 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:37:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 14:37:01,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-01-31 14:37:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 14:37:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-01-31 14:37:01,180 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 59 [2022-01-31 14:37:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:37:01,180 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-01-31 14:37:01,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-01-31 14:37:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-01-31 14:37:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 14:37:01,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:37:01,182 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:37:01,198 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 14:37:01,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:01,399 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:37:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:37:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash 191644600, now seen corresponding path program 3 times [2022-01-31 14:37:01,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:37:01,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317396553] [2022-01-31 14:37:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:37:01,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:37:01,410 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:37:01,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119215835] [2022-01-31 14:37:01,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:37:01,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:37:01,411 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 14:37:01,412 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 14:37:03,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 14:37:03,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:37:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 14:37:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:37:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:37:03,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:37:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-01-31 14:37:04,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:37:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317396553] [2022-01-31 14:37:04,046 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:37:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119215835] [2022-01-31 14:37:04,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119215835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:37:04,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:37:04,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 14:37:04,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052249340] [2022-01-31 14:37:04,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:37:04,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 14:37:04,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:37:04,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 14:37:04,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-31 14:37:04,048 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-01-31 14:37:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:37:04,383 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2022-01-31 14:37:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 14:37:04,383 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 113 [2022-01-31 14:37:04,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:37:04,385 INFO L225 Difference]: With dead ends: 218 [2022-01-31 14:37:04,385 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 14:37:04,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 14:37:04,386 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 335 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:37:04,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 238 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:37:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 14:37:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-01-31 14:37:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 14:37:04,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-01-31 14:37:04,397 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 113 [2022-01-31 14:37:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:37:04,397 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-01-31 14:37:04,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-01-31 14:37:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-01-31 14:37:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 14:37:04,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:37:04,400 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:37:04,407 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 14:37:04,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:04,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:37:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:37:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash -698087944, now seen corresponding path program 4 times [2022-01-31 14:37:04,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:37:04,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397158315] [2022-01-31 14:37:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:37:04,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:37:04,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:37:04,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023954099] [2022-01-31 14:37:04,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 14:37:04,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:04,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:37:04,641 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 14:37:04,642 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 14:37:04,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 14:37:04,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:37:04,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 14:37:04,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:37:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:37:05,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:37:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-01-31 14:37:06,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:37:06,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397158315] [2022-01-31 14:37:06,229 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:37:06,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023954099] [2022-01-31 14:37:06,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023954099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:37:06,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:37:06,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 14:37:06,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532470309] [2022-01-31 14:37:06,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:37:06,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 14:37:06,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:37:06,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 14:37:06,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 14:37:06,232 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-01-31 14:37:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:37:07,288 INFO L93 Difference]: Finished difference Result 434 states and 481 transitions. [2022-01-31 14:37:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 14:37:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 221 [2022-01-31 14:37:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:37:07,292 INFO L225 Difference]: With dead ends: 434 [2022-01-31 14:37:07,292 INFO L226 Difference]: Without dead ends: 434 [2022-01-31 14:37:07,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 14:37:07,295 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 631 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 14:37:07,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 506 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 14:37:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-01-31 14:37:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-01-31 14:37:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 14:37:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-01-31 14:37:07,324 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 221 [2022-01-31 14:37:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:37:07,324 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-01-31 14:37:07,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-01-31 14:37:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-01-31 14:37:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-01-31 14:37:07,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:37:07,339 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:37:07,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 14:37:07,539 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,SelfDestructingSolverStorable7 [2022-01-31 14:37:07,540 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:37:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:37:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -619812232, now seen corresponding path program 5 times [2022-01-31 14:37:07,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:37:07,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317431965] [2022-01-31 14:37:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:37:07,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:37:07,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:37:07,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461996664] [2022-01-31 14:37:07,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 14:37:07,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:07,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:37:07,557 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 14:37:07,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 14:37:09,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-31 14:37:09,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:37:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 14:37:09,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:37:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 14:37:11,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:37:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-01-31 14:37:13,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:37:13,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317431965] [2022-01-31 14:37:13,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:37:13,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461996664] [2022-01-31 14:37:13,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461996664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:37:13,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:37:13,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-31 14:37:13,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371816202] [2022-01-31 14:37:13,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:37:13,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 14:37:13,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:37:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 14:37:13,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 14:37:13,166 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-01-31 14:37:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:37:16,755 INFO L93 Difference]: Finished difference Result 866 states and 961 transitions. [2022-01-31 14:37:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-01-31 14:37:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) Word has length 437 [2022-01-31 14:37:16,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:37:16,758 INFO L225 Difference]: With dead ends: 866 [2022-01-31 14:37:16,758 INFO L226 Difference]: Without dead ends: 866 [2022-01-31 14:37:16,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 14:37:16,766 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1290 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 14:37:16,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1290 Valid, 850 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 14:37:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-01-31 14:37:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-01-31 14:37:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 670 states have (on average 1.1417910447761195) internal successors, (765), 670 states have internal predecessors, (765), 99 states have call successors, (99), 98 states have call predecessors, (99), 96 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 14:37:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 961 transitions. [2022-01-31 14:37:16,792 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 961 transitions. Word has length 437 [2022-01-31 14:37:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:37:16,794 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 961 transitions. [2022-01-31 14:37:16,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-01-31 14:37:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 961 transitions. [2022-01-31 14:37:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-01-31 14:37:16,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:37:16,811 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:37:16,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 14:37:17,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:17,020 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:37:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:37:17,020 INFO L85 PathProgramCache]: Analyzing trace with hash 151958392, now seen corresponding path program 6 times [2022-01-31 14:37:17,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:37:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012164109] [2022-01-31 14:37:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:37:17,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:37:17,050 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:37:17,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524171956] [2022-01-31 14:37:17,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 14:37:17,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:37:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:37:17,064 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:37:17,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process