/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 06:08:40,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 06:08:40,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 06:08:40,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 06:08:40,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 06:08:40,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 06:08:40,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 06:08:40,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 06:08:40,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 06:08:40,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 06:08:40,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 06:08:40,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 06:08:40,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 06:08:40,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 06:08:40,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 06:08:40,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 06:08:40,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 06:08:40,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 06:08:40,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 06:08:40,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 06:08:40,485 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 06:08:40,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 06:08:40,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 06:08:40,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 06:08:40,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 06:08:40,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 06:08:40,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 06:08:40,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 06:08:40,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 06:08:40,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 06:08:40,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 06:08:40,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 06:08:40,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 06:08:40,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 06:08:40,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 06:08:40,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 06:08:40,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 06:08:40,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 06:08:40,508 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 06:08:40,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 06:08:40,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 06:08:40,509 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 06:08:40,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 06:08:40,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 06:08:40,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 06:08:40,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 06:08:40,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 06:08:40,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 06:08:40,510 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 06:08:40,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 06:08:40,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 06:08:40,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 06:08:40,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 06:08:40,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 06:08:40,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 06:08:40,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 06:08:40,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:08:40,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 06:08:40,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 06:08:40,512 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 06:08:40,512 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 06:08:40,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 06:08:40,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 06:08:40,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 06:08:40,737 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 06:08:40,737 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 06:08:40,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-04-06 06:08:40,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5e50d64/2106fc10983a4ab3a94ec96578ad855d/FLAGc2c8bf50e [2022-04-06 06:08:41,110 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 06:08:41,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-04-06 06:08:41,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5e50d64/2106fc10983a4ab3a94ec96578ad855d/FLAGc2c8bf50e [2022-04-06 06:08:41,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5e50d64/2106fc10983a4ab3a94ec96578ad855d [2022-04-06 06:08:41,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 06:08:41,527 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 06:08:41,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 06:08:41,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 06:08:41,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 06:08:41,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@736877b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41, skipping insertion in model container [2022-04-06 06:08:41,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 06:08:41,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 06:08:41,702 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2022-04-06 06:08:41,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:08:41,743 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 06:08:41,753 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2022-04-06 06:08:41,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:08:41,782 INFO L208 MainTranslator]: Completed translation [2022-04-06 06:08:41,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41 WrapperNode [2022-04-06 06:08:41,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 06:08:41,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 06:08:41,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 06:08:41,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 06:08:41,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 06:08:41,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 06:08:41,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 06:08:41,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 06:08:41,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41" (1/1) ... [2022-04-06 06:08:41,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:08:41,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:41,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 06:08:41,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 06:08:41,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 06:08:41,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 06:08:41,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 06:08:41,890 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 06:08:41,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 06:08:41,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 06:08:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 06:08:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 06:08:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 06:08:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 06:08:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 06:08:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 06:08:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 06:08:41,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 06:08:41,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 06:08:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 06:08:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 06:08:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 06:08:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 06:08:41,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 06:08:41,943 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 06:08:41,944 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 06:08:42,128 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 06:08:42,147 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 06:08:42,147 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 06:08:42,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:42 BoogieIcfgContainer [2022-04-06 06:08:42,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 06:08:42,149 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 06:08:42,149 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 06:08:42,150 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 06:08:42,152 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:42" (1/1) ... [2022-04-06 06:08:42,156 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 06:08:42,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:42 BasicIcfg [2022-04-06 06:08:42,181 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 06:08:42,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 06:08:42,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 06:08:42,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 06:08:42,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:08:41" (1/4) ... [2022-04-06 06:08:42,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:42, skipping insertion in model container [2022-04-06 06:08:42,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:41" (2/4) ... [2022-04-06 06:08:42,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:42, skipping insertion in model container [2022-04-06 06:08:42,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:42" (3/4) ... [2022-04-06 06:08:42,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:08:42, skipping insertion in model container [2022-04-06 06:08:42,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:42" (4/4) ... [2022-04-06 06:08:42,186 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.cJordan [2022-04-06 06:08:42,190 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 06:08:42,190 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 06:08:42,225 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 06:08:42,229 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 06:08:42,230 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 06:08:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 06:08:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:08:42,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:42,259 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:42,260 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:42,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:42,266 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-04-06 06:08:42,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:42,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242529438] [2022-04-06 06:08:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:42,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:42,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:08:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:42,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:08:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:42,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 06:08:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:08:42,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:42,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242529438] [2022-04-06 06:08:42,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242529438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:42,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:42,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 06:08:42,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611532851] [2022-04-06 06:08:42,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:42,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 06:08:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 06:08:42,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:08:42,501 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:08:44,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:44,629 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-04-06 06:08:44,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 06:08:44,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 06:08:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:44,635 INFO L225 Difference]: With dead ends: 38 [2022-04-06 06:08:44,636 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 06:08:44,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:08:44,639 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:44,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 06:08:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 06:08:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 06:08:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 06:08:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-04-06 06:08:44,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-04-06 06:08:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:44,672 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-04-06 06:08:44,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:08:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-04-06 06:08:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 06:08:44,675 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:44,675 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:44,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 06:08:44,676 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:44,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-04-06 06:08:44,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:44,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070730484] [2022-04-06 06:08:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:44,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:44,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:08:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:44,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:08:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:44,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 06:08:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:08:44,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:44,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070730484] [2022-04-06 06:08:44,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070730484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:44,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:44,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 06:08:44,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306062128] [2022-04-06 06:08:44,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:44,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 06:08:44,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:44,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 06:08:44,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 06:08:44,992 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:08:46,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:48,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:08:51,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:08:53,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:08:53,993 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-04-06 06:08:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 06:08:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-06 06:08:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:08:53,995 INFO L225 Difference]: With dead ends: 50 [2022-04-06 06:08:53,995 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 06:08:53,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:08:53,996 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-04-06 06:08:53,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 51 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2022-04-06 06:08:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 06:08:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 06:08:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 06:08:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-04-06 06:08:54,010 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-04-06 06:08:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:08:54,010 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-04-06 06:08:54,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:08:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-04-06 06:08:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 06:08:54,011 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:54,012 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:54,012 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 06:08:54,012 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-04-06 06:08:54,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:54,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175586891] [2022-04-06 06:08:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:54,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:54,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:08:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:08:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:54,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 06:08:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:08:54,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:54,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175586891] [2022-04-06 06:08:54,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175586891] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 06:08:54,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408983138] [2022-04-06 06:08:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:54,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:08:54,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:54,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:08:54,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 06:08:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:54,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 06:08:54,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:08:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 06:08:54,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:08:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 06:08:54,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408983138] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:08:54,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 06:08:54,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-04-06 06:08:54,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739379921] [2022-04-06 06:08:54,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 06:08:54,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 06:08:54,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:54,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 06:08:54,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-04-06 06:08:54,837 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 06:09:01,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:03,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:06,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:08,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:11,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:13,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:16,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:17,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:19,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:20,180 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-04-06 06:09:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 06:09:20,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 26 [2022-04-06 06:09:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:20,182 INFO L225 Difference]: With dead ends: 62 [2022-04-06 06:09:20,182 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 06:09:20,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-04-06 06:09:20,183 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 67 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 137 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:20,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 105 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 593 Invalid, 7 Unknown, 0 Unchecked, 25.1s Time] [2022-04-06 06:09:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 06:09:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-04-06 06:09:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 26 states have call successors, (26), 6 states have call predecessors, (26), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 06:09:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2022-04-06 06:09:20,190 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 26 [2022-04-06 06:09:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:20,191 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2022-04-06 06:09:20,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 06:09:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2022-04-06 06:09:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 06:09:20,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:20,192 INFO L499 BasicCegarLoop]: trace histogram [3, 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] [2022-04-06 06:09:20,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 06:09:20,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:20,397 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:20,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-04-06 06:09:20,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:20,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144668028] [2022-04-06 06:09:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:20,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:20,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:09:20,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059007461] [2022-04-06 06:09:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:20,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:20,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:20,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:09:20,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 06:09:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:09:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:09:20,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:09:20,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144668028] [2022-04-06 06:09:20,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:09:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059007461] [2022-04-06 06:09:20,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059007461] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:20,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:20,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:09:20,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124758391] [2022-04-06 06:09:20,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:20,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:09:20,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:09:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:09:20,606 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:09:22,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:23,402 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2022-04-06 06:09:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:09:23,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 06:09:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:23,404 INFO L225 Difference]: With dead ends: 68 [2022-04-06 06:09:23,404 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 06:09:23,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:09:23,405 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:23,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 06:09:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 06:09:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 06:09:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 06:09:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-04-06 06:09:23,409 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 34 [2022-04-06 06:09:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:23,409 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-04-06 06:09:23,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:09:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-04-06 06:09:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 06:09:23,410 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:23,410 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:09:23,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 06:09:23,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 06:09:23,614 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-04-06 06:09:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:23,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430786918] [2022-04-06 06:09:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:23,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:09:23,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025111156] [2022-04-06 06:09:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:23,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:23,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:23,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:09:23,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 06:09:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:09:23,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 06:09:23,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:09:23,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:23,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430786918] [2022-04-06 06:09:23,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:09:23,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025111156] [2022-04-06 06:09:23,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025111156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:23,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:23,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:09:23,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471044170] [2022-04-06 06:09:23,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:23,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:09:23,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:09:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:09:23,835 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:09:25,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:26,520 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-04-06 06:09:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:09:26,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-06 06:09:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:26,521 INFO L225 Difference]: With dead ends: 55 [2022-04-06 06:09:26,522 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 06:09:26,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:09:26,523 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 5 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:26,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 151 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 06:09:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 06:09:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 06:09:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 06:09:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-04-06 06:09:26,528 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 36 [2022-04-06 06:09:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:26,528 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-04-06 06:09:26,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:09:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-04-06 06:09:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 06:09:26,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:26,529 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:09:26,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 06:09:26,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:26,735 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:26,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-04-06 06:09:26,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94495188] [2022-04-06 06:09:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:26,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:26,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:09:26,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455799124] [2022-04-06 06:09:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:26,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:26,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:26,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:09:26,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 06:09:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 06:09:26,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 06:09:27,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 06:09:31,700 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~q~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 3 .cse0) (* 2 (div (mod c_main_~p~0 4294967296) 2))) 4294967296))) (= .cse1 1))) is different from false [2022-04-06 06:09:52,988 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~q~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 3 .cse0) (* 2 (div (mod c_main_~p~0 4294967296) 2))) 4294967296))) (<= .cse1 (mod c_main_~n~0 4294967296)) (= .cse1 1))) is different from false [2022-04-06 06:09:55,120 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~q~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 3 .cse0) (* 2 (div (mod c_main_~p~0 4294967296) 2))) 4294967296))) (<= .cse1 (mod c_main_~n~0 4294967296)) (= .cse1 1))) is different from true [2022-04-06 06:10:12,128 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~q~0 4) 4294967296)) (.cse2 (mod c_main_~n~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 2 (div (mod c_main_~p~0 4294967296) 2)) (* 3 .cse0)) 4294967296))) (<= .cse1 .cse2) (= 1 .cse1) (not (<= (mod c_main_~q~0 4294967296) .cse2)))) is different from false [2022-04-06 06:10:14,271 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~q~0 4) 4294967296)) (.cse2 (mod c_main_~n~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 2 (div (mod c_main_~p~0 4294967296) 2)) (* 3 .cse0)) 4294967296))) (<= .cse1 .cse2) (= 1 .cse1) (not (<= (mod c_main_~q~0 4294967296) .cse2)))) is different from true [2022-04-06 06:10:31,342 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~q~0 4) 4294967296)) (.cse2 (mod c_main_~n~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 2 (div (mod c_main_~p~0 4294967296) 2)) (* 3 .cse0)) 4294967296))) (<= .cse1 .cse2) (< .cse2 (mod c_main_~q~0 4294967296)))) is different from false [2022-04-06 06:10:33,493 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (* c_main_~q~0 4) 4294967296)) (.cse2 (mod c_main_~n~0 4294967296))) (or (let ((.cse0 (div .cse1 4))) (< (mod (+ (* 4294967295 .cse0) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 2 (div (mod c_main_~p~0 4294967296) 2)) (* 3 .cse0)) 4294967296))) (<= .cse1 .cse2) (< .cse2 (mod c_main_~q~0 4294967296)))) is different from true [2022-04-06 06:10:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 4 not checked. [2022-04-06 06:10:33,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:10:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94495188] [2022-04-06 06:10:33,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:10:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455799124] [2022-04-06 06:10:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455799124] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 06:10:33,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 06:10:33,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2022-04-06 06:10:33,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279828747] [2022-04-06 06:10:33,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 06:10:33,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 06:10:33,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:10:33,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 06:10:33,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=151, Unknown=7, NotChecked=108, Total=306 [2022-04-06 06:10:33,543 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 06:10:40,083 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~n~0 4294967296))) (and (<= .cse0 1) (= c_main_~p~0 0) (= c_main_~q~0 4) (< (mod (+ (* 4294967295 c_main_~h~0) c_main_~r~0) 4294967296) (mod (+ (* 2 c_main_~p~0) (* c_main_~q~0 3)) 4294967296)) (let ((.cse2 (mod c_main_~q~0 4294967296))) (or (let ((.cse1 (div .cse2 4))) (< (mod (+ (* 4294967295 .cse1) c_main_~r~0 (* 4294967295 c_main_~p~0)) 4294967296) (mod (+ (* 3 .cse1) (* 2 (div (mod c_main_~p~0 4294967296) 2))) 4294967296))) (<= .cse2 .cse0) (= .cse2 1))) (<= 1 .cse0) (= c_main_~n~0 c_main_~r~0))) is different from true [2022-04-06 06:10:43,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:10:45,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:10:47,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:10:50,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:10:52,185 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:10:54,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:10:56,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:11:03,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:11:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:11:05,234 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2022-04-06 06:11:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 06:11:05,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 59 [2022-04-06 06:11:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:11:05,247 INFO L225 Difference]: With dead ends: 73 [2022-04-06 06:11:05,247 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 06:11:05,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=67, Invalid=287, Unknown=8, NotChecked=190, Total=552 [2022-04-06 06:11:05,250 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 43 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-04-06 06:11:05,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 280 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 316 Invalid, 7 Unknown, 272 Unchecked, 25.1s Time] [2022-04-06 06:11:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 06:11:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2022-04-06 06:11:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 06:11:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-04-06 06:11:05,258 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 59 [2022-04-06 06:11:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:11:05,258 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-04-06 06:11:05,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 16 states have internal predecessors, (33), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 06:11:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-04-06 06:11:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 06:11:05,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:11:05,260 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:11:05,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 06:11:05,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:11:05,466 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:11:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:11:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1266975567, now seen corresponding path program 2 times [2022-04-06 06:11:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:11:05,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248502309] [2022-04-06 06:11:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:11:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:11:05,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:11:05,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10302041] [2022-04-06 06:11:05,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 06:11:05,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:11:05,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:11:05,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:11:05,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process