/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/hard-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 07:22:26,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 07:22:26,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 07:22:26,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 07:22:26,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 07:22:26,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 07:22:26,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 07:22:26,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 07:22:26,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 07:22:26,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 07:22:26,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 07:22:26,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 07:22:26,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 07:22:26,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 07:22:26,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 07:22:26,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 07:22:26,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 07:22:26,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 07:22:26,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 07:22:26,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 07:22:26,695 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 07:22:26,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 07:22:26,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 07:22:26,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 07:22:26,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 07:22:26,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 07:22:26,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 07:22:26,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 07:22:26,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 07:22:26,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 07:22:26,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 07:22:26,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 07:22:26,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 07:22:26,726 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 07:22:26,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 07:22:26,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 07:22:26,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 07:22:26,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 07:22:26,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 07:22:26,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 07:22:26,728 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 07:22:26,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 07:22:26,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 07:22:26,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 07:22:26,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 07:22:26,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 07:22:26,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 07:22:26,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 07:22:26,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:22:26,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 07:22:26,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 07:22:26,730 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 07:22:26,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 07:22:26,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 07:22:26,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 07:22:26,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 07:22:26,937 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 07:22:26,938 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 07:22:26,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2022-04-06 07:22:27,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41f81426a/f8f2a2276c1543ce97a4321c3847adb3/FLAG47477516d [2022-04-06 07:22:27,322 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 07:22:27,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2022-04-06 07:22:27,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41f81426a/f8f2a2276c1543ce97a4321c3847adb3/FLAG47477516d [2022-04-06 07:22:27,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41f81426a/f8f2a2276c1543ce97a4321c3847adb3 [2022-04-06 07:22:27,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 07:22:27,740 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 07:22:27,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 07:22:27,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 07:22:27,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 07:22:27,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:27,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3971b3e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27, skipping insertion in model container [2022-04-06 07:22:27,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:27,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 07:22:27,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 07:22:27,897 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/hard-u_valuebound100.c[537,550] [2022-04-06 07:22:27,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:22:27,942 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 07:22:27,952 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/hard-u_valuebound100.c[537,550] [2022-04-06 07:22:27,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:22:27,970 INFO L208 MainTranslator]: Completed translation [2022-04-06 07:22:27,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27 WrapperNode [2022-04-06 07:22:27,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 07:22:27,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 07:22:27,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 07:22:27,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 07:22:27,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:27,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:27,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:27,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:27,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:28,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:28,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:28,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 07:22:28,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 07:22:28,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 07:22:28,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 07:22:28,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27" (1/1) ... [2022-04-06 07:22:28,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:22:28,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:22:28,055 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 07:22:28,063 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 07:22:28,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 07:22:28,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 07:22:28,087 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 07:22:28,087 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 07:22:28,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 07:22:28,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 07:22:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 07:22:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 07:22:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 07:22:28,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 07:22:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 07:22:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 07:22:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 07:22:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 07:22:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 07:22:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 07:22:28,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 07:22:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 07:22:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 07:22:28,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 07:22:28,140 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 07:22:28,142 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 07:22:28,283 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 07:22:28,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 07:22:28,288 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 07:22:28,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:22:28 BoogieIcfgContainer [2022-04-06 07:22:28,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 07:22:28,291 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 07:22:28,291 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 07:22:28,292 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 07:22:28,294 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:22:28" (1/1) ... [2022-04-06 07:22:28,296 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 07:22:28,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:22:28 BasicIcfg [2022-04-06 07:22:28,317 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 07:22:28,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 07:22:28,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 07:22:28,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 07:22:28,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:22:27" (1/4) ... [2022-04-06 07:22:28,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bd0918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:22:28, skipping insertion in model container [2022-04-06 07:22:28,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:22:27" (2/4) ... [2022-04-06 07:22:28,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bd0918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:22:28, skipping insertion in model container [2022-04-06 07:22:28,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:22:28" (3/4) ... [2022-04-06 07:22:28,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bd0918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:22:28, skipping insertion in model container [2022-04-06 07:22:28,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:22:28" (4/4) ... [2022-04-06 07:22:28,324 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.cJordan [2022-04-06 07:22:28,328 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 07:22:28,329 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 07:22:28,366 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 07:22:28,372 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 07:22:28,373 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 07:22:28,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 07:22:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 07:22:28,415 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:22:28,416 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:22:28,416 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:22:28,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:22:28,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-04-06 07:22:28,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:22:28,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904978087] [2022-04-06 07:22:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:28,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:22:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:28,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:22:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:28,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:22:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:28,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 07:22:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:28,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 07:22:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:22:28,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:22:28,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904978087] [2022-04-06 07:22:28,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904978087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:22:28,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:22:28,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 07:22:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100817352] [2022-04-06 07:22:28,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:22:28,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 07:22:28,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:22:28,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 07:22:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 07:22:28,739 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 07:22:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:22:28,836 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-04-06 07:22:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 07:22:28,839 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 07:22:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:22:28,854 INFO L225 Difference]: With dead ends: 38 [2022-04-06 07:22:28,854 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 07:22:28,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 07:22:28,861 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:22:28,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:22:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 07:22:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 07:22:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 07:22:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-04-06 07:22:28,912 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-04-06 07:22:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:22:28,913 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-04-06 07:22:28,914 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 07:22:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-04-06 07:22:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 07:22:28,916 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:22:28,916 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:22:28,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 07:22:28,917 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:22:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:22:28,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-04-06 07:22:28,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:22:28,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127828014] [2022-04-06 07:22:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:28,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:22:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:22:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:22:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 07:22:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 07:22:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:22:29,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:22:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127828014] [2022-04-06 07:22:29,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127828014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:22:29,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:22:29,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:22:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445048957] [2022-04-06 07:22:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:22:29,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:22:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:22:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:22:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:22:29,112 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 07:22:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:22:29,277 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-04-06 07:22:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 07:22:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-06 07:22:29,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:22:29,279 INFO L225 Difference]: With dead ends: 44 [2022-04-06 07:22:29,279 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 07:22:29,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:22:29,281 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:22:29,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:22:29,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 07:22:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-06 07:22:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 07:22:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-06 07:22:29,290 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-04-06 07:22:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:22:29,291 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-06 07:22:29,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 07:22:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-06 07:22:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 07:22:29,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:22:29,292 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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 07:22:29,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 07:22:29,293 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:22:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:22:29,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-04-06 07:22:29,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:22:29,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629088513] [2022-04-06 07:22:29,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:29,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:22:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:22:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:22:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 07:22:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 07:22:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 07:22:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:22:29,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:22:29,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629088513] [2022-04-06 07:22:29,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629088513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:22:29,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:22:29,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:22:29,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840359347] [2022-04-06 07:22:29,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:22:29,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:22:29,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:22:29,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:22:29,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:22:29,440 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 07:22:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:22:29,606 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-04-06 07:22:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 07:22:29,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 33 [2022-04-06 07:22:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:22:29,607 INFO L225 Difference]: With dead ends: 48 [2022-04-06 07:22:29,608 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 07:22:29,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:22:29,609 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:22:29,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:22:29,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 07:22:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-04-06 07:22:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 07:22:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-04-06 07:22:29,616 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-04-06 07:22:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:22:29,617 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-04-06 07:22:29,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 07:22:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-04-06 07:22:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 07:22:29,618 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:22:29,618 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:22:29,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 07:22:29,618 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:22:29,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:22:29,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-04-06 07:22:29,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:22:29,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227012770] [2022-04-06 07:22:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:29,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:22:29,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:22:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949890537] [2022-04-06 07:22:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:29,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:22:29,635 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 07:22:29,654 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 07:22:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:22:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:22:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 07:22:29,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:22:29,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:22:29,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227012770] [2022-04-06 07:22:29,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:22:29,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949890537] [2022-04-06 07:22:29,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949890537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:22:29,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:22:29,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:22:29,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340823495] [2022-04-06 07:22:29,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:22:29,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:22:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:22:29,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:22:29,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:22:29,861 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 07:22:31,911 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 07:22:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:22:32,104 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-04-06 07:22:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:22:32,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-04-06 07:22:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:22:32,106 INFO L225 Difference]: With dead ends: 56 [2022-04-06 07:22:32,106 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 07:22:32,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 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 07:22:32,108 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 07:22:32,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 142 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 07:22:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 07:22:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 07:22:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 07:22:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-04-06 07:22:32,115 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2022-04-06 07:22:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:22:32,115 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-04-06 07:22:32,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 07:22:32,116 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-04-06 07:22:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 07:22:32,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:22:32,117 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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 07:22:32,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 07:22:32,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:32,331 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:22:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:22:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-04-06 07:22:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:22:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854953915] [2022-04-06 07:22:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:22:32,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:22:32,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726458636] [2022-04-06 07:22:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:32,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:22:32,346 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 07:22:32,359 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 07:22:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:32,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 07:22:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:22:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 07:22:32,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:22:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 07:22:33,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:22:33,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854953915] [2022-04-06 07:22:33,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:22:33,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726458636] [2022-04-06 07:22:33,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726458636] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 07:22:33,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 07:22:33,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-06 07:22:33,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709558289] [2022-04-06 07:22:33,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:22:33,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:22:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:22:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:22:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:22:33,056 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 07:22:35,180 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 07:22:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:22:35,338 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-04-06 07:22:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:22:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-04-06 07:22:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:22:35,339 INFO L225 Difference]: With dead ends: 66 [2022-04-06 07:22:35,340 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 07:22:35,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 07:22:35,341 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 07:22:35,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 07:22:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 07:22:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-04-06 07:22:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 07:22:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-04-06 07:22:35,348 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 45 [2022-04-06 07:22:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:22:35,348 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-04-06 07:22:35,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 07:22:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-04-06 07:22:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 07:22:35,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:22:35,350 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 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] [2022-04-06 07:22:35,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 07:22:35,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:35,560 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:22:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:22:35,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-04-06 07:22:35,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:22:35,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541140974] [2022-04-06 07:22:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:35,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:22:35,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:22:35,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947502035] [2022-04-06 07:22:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:35,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:35,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:22:35,573 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 07:22:35,591 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 07:22:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:35,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 07:22:35,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:22:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 07:22:36,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:22:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 4 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 07:22:38,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:22:38,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541140974] [2022-04-06 07:22:38,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:22:38,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947502035] [2022-04-06 07:22:38,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947502035] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:22:38,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:22:38,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-04-06 07:22:38,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962644223] [2022-04-06 07:22:38,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:22:38,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 07:22:38,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:22:38,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 07:22:38,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2022-04-06 07:22:38,512 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 07:22:40,818 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 07:22:43,851 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 07:22:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:22:44,890 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-04-06 07:22:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 07:22:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 55 [2022-04-06 07:22:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:22:44,893 INFO L225 Difference]: With dead ends: 83 [2022-04-06 07:22:44,893 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 07:22:44,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=46, Invalid=163, Unknown=1, NotChecked=0, Total=210 [2022-04-06 07:22:44,894 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 33 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-04-06 07:22:44,897 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 314 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 261 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-04-06 07:22:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 07:22:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2022-04-06 07:22:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 47 states have internal predecessors, (53), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 07:22:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2022-04-06 07:22:44,906 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 55 [2022-04-06 07:22:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:22:44,906 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2022-04-06 07:22:44,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 07:22:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2022-04-06 07:22:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 07:22:44,907 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:22:44,907 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:22:44,919 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 07:22:45,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:45,109 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:22:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:22:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash 810354846, now seen corresponding path program 1 times [2022-04-06 07:22:45,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:22:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073696181] [2022-04-06 07:22:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:22:45,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:22:45,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664753567] [2022-04-06 07:22:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:45,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:22:45,126 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 07:22:45,158 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 07:22:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:22:45,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 07:22:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:22:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 07:22:45,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:22:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 07:22:46,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:22:46,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073696181] [2022-04-06 07:22:46,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:22:46,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664753567] [2022-04-06 07:22:46,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664753567] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 07:22:46,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 07:22:46,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-06 07:22:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923009543] [2022-04-06 07:22:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:22:46,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:22:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:22:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:22:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:22:46,209 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 07:22:48,943 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 07:22:51,301 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 07:22:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:22:51,479 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-04-06 07:22:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:22:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-04-06 07:22:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:22:51,482 INFO L225 Difference]: With dead ends: 84 [2022-04-06 07:22:51,482 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 07:22:51,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-06 07:22:51,483 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-04-06 07:22:51,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 177 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2022-04-06 07:22:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 07:22:51,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-06 07:22:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 43 states have (on average 1.186046511627907) internal successors, (51), 46 states have internal predecessors, (51), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 07:22:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2022-04-06 07:22:51,491 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 56 [2022-04-06 07:22:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:22:51,492 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2022-04-06 07:22:51,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 07:22:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2022-04-06 07:22:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 07:22:51,493 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:22:51,493 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:22:51,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 07:22:51,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:51,713 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:22:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:22:51,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2022-04-06 07:22:51,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:22:51,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102188286] [2022-04-06 07:22:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:51,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:22:51,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:22:51,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138326709] [2022-04-06 07:22:51,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:22:51,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:22:51,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:22:51,724 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 07:22:51,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process