/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/verifythis/elimination_max.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 01:21:01,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 01:21:01,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 01:21:01,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 01:21:01,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 01:21:01,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 01:21:01,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 01:21:01,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 01:21:01,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 01:21:01,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 01:21:01,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 01:21:01,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 01:21:01,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 01:21:01,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 01:21:01,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 01:21:01,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 01:21:01,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 01:21:01,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 01:21:01,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 01:21:01,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 01:21:01,460 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 01:21:01,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 01:21:01,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 01:21:01,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 01:21:01,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 01:21:01,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 01:21:01,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 01:21:01,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 01:21:01,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 01:21:01,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 01:21:01,495 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 01:21:01,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 01:21:01,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 01:21:01,497 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 01:21:01,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 01:21:01,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 01:21:01,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 01:21:01,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 01:21:01,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 01:21:01,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 01:21:01,498 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 01:21:01,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 01:21:01,498 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 01:21:01,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 01:21:01,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 01:21:01,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 01:21:01,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 01:21:01,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 01:21:01,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:21:01,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 01:21:01,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 01:21:01,500 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 01:21:01,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 01:21:01,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 01:21:01,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 01:21:01,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 01:21:01,680 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 01:21:01,680 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 01:21:01,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max.c [2022-04-05 01:21:01,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a0480a35/22bd1a6fd6a34a25b8ffb435a339af8e/FLAG56b194cf7 [2022-04-05 01:21:02,067 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 01:21:02,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max.c [2022-04-05 01:21:02,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a0480a35/22bd1a6fd6a34a25b8ffb435a339af8e/FLAG56b194cf7 [2022-04-05 01:21:02,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a0480a35/22bd1a6fd6a34a25b8ffb435a339af8e [2022-04-05 01:21:02,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 01:21:02,485 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 01:21:02,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 01:21:02,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 01:21:02,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 01:21:02,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a4498b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02, skipping insertion in model container [2022-04-05 01:21:02,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 01:21:02,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 01:21:02,612 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max.c[485,498] [2022-04-05 01:21:02,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:21:02,642 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 01:21:02,651 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max.c[485,498] [2022-04-05 01:21:02,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:21:02,676 INFO L208 MainTranslator]: Completed translation [2022-04-05 01:21:02,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02 WrapperNode [2022-04-05 01:21:02,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 01:21:02,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 01:21:02,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 01:21:02,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 01:21:02,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 01:21:02,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 01:21:02,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 01:21:02,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 01:21:02,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:21:02,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:21:02,744 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) [2022-04-05 01:21:02,765 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 [2022-04-05 01:21:02,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 01:21:02,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 01:21:02,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 01:21:02,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 01:21:02,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 01:21:02,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 01:21:02,776 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-04-05 01:21:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-04-05 01:21:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-04-05 01:21:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 01:21:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 01:21:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 01:21:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 01:21:02,777 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 01:21:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 01:21:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 01:21:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 01:21:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-05 01:21:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-04-05 01:21:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 01:21:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 01:21:02,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 01:21:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 01:21:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 01:21:02,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 01:21:02,845 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 01:21:02,846 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 01:21:02,966 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 01:21:02,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 01:21:02,970 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 01:21:02,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:21:02 BoogieIcfgContainer [2022-04-05 01:21:02,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 01:21:02,972 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 01:21:02,972 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 01:21:02,972 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 01:21:02,988 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:21:02" (1/1) ... [2022-04-05 01:21:02,990 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 01:21:03,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:21:03 BasicIcfg [2022-04-05 01:21:03,004 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 01:21:03,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 01:21:03,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 01:21:03,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 01:21:03,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 01:21:02" (1/4) ... [2022-04-05 01:21:03,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c805370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:21:03, skipping insertion in model container [2022-04-05 01:21:03,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:21:02" (2/4) ... [2022-04-05 01:21:03,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c805370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:21:03, skipping insertion in model container [2022-04-05 01:21:03,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:21:02" (3/4) ... [2022-04-05 01:21:03,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c805370 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:21:03, skipping insertion in model container [2022-04-05 01:21:03,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:21:03" (4/4) ... [2022-04-05 01:21:03,015 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.cJordan [2022-04-05 01:21:03,018 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 01:21:03,018 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 01:21:03,058 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 01:21:03,064 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 [2022-04-05 01:21:03,064 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 01:21:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 01:21:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 01:21:03,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:21:03,084 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, 1, 1, 1, 1, 1] [2022-04-05 01:21:03,084 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:21:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:21:03,088 INFO L85 PathProgramCache]: Analyzing trace with hash 64952803, now seen corresponding path program 1 times [2022-04-05 01:21:03,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:21:03,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664029815] [2022-04-05 01:21:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:21:03,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:21:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:21:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:21:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 01:21:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-05 01:21:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 01:21:03,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:21:03,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664029815] [2022-04-05 01:21:03,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664029815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:21:03,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:21:03,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 01:21:03,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399042701] [2022-04-05 01:21:03,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:21:03,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 01:21:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:21:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 01:21:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 01:21:03,305 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 01:21:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:21:03,417 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-04-05 01:21:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:21:03,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 4 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 29 [2022-04-05 01:21:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:21:03,433 INFO L225 Difference]: With dead ends: 39 [2022-04-05 01:21:03,433 INFO L226 Difference]: Without dead ends: 34 [2022-04-05 01:21:03,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:21:03,436 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:21:03,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 38 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:21:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-05 01:21:03,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-05 01:21:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 01:21:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-05 01:21:03,468 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2022-04-05 01:21:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:21:03,469 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-05 01:21:03,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 01:21:03,469 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-05 01:21:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 01:21:03,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:21:03,470 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, 1, 1, 1, 1, 1] [2022-04-05 01:21:03,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 01:21:03,471 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:21:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:21:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2146770526, now seen corresponding path program 1 times [2022-04-05 01:21:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:21:03,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051177731] [2022-04-05 01:21:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:21:03,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:21:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:21:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:21:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 01:21:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-05 01:21:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 01:21:03,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:21:03,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051177731] [2022-04-05 01:21:03,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051177731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:21:03,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:21:03,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-05 01:21:03,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863173746] [2022-04-05 01:21:03,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:21:03,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 01:21:03,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:21:03,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 01:21:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-04-05 01:21:03,734 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 01:21:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:21:03,960 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-05 01:21:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 01:21:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-04-05 01:21:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:21:03,962 INFO L225 Difference]: With dead ends: 38 [2022-04-05 01:21:03,962 INFO L226 Difference]: Without dead ends: 38 [2022-04-05 01:21:03,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-04-05 01:21:03,963 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:21:03,964 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 39 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:21:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-05 01:21:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-05 01:21:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 01:21:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-04-05 01:21:03,968 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2022-04-05 01:21:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:21:03,969 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-04-05 01:21:03,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 01:21:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-04-05 01:21:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 01:21:03,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:21:03,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:21:03,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 01:21:03,970 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:21:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:21:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash -359953696, now seen corresponding path program 1 times [2022-04-05 01:21:03,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:21:03,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345780730] [2022-04-05 01:21:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:21:03,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:21:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:04,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:21:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:04,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:21:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:04,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 01:21:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:04,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-05 01:21:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:04,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-05 01:21:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:21:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 01:21:04,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:21:04,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345780730] [2022-04-05 01:21:04,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345780730] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:21:04,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:21:04,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-05 01:21:04,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366486023] [2022-04-05 01:21:04,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:21:04,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 01:21:04,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:21:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 01:21:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-04-05 01:21:04,094 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:21:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:21:04,290 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-05 01:21:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 01:21:04,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-04-05 01:21:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:21:04,291 INFO L225 Difference]: With dead ends: 36 [2022-04-05 01:21:04,291 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 01:21:04,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-04-05 01:21:04,292 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 61 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 01:21:04,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 38 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 01:21:04,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 01:21:04,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 01:21:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 01:21:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 01:21:04,294 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-04-05 01:21:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:21:04,294 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 01:21:04,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:21:04,294 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 01:21:04,294 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 01:21:04,296 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 01:21:04,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 01:21:04,299 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-04-05 01:21:04,299 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 01:21:04,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:21:04 BasicIcfg [2022-04-05 01:21:04,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 01:21:04,302 INFO L158 Benchmark]: Toolchain (without parser) took 1816.29ms. Allocated memory was 175.1MB in the beginning and 210.8MB in the end (delta: 35.7MB). Free memory was 153.0MB in the beginning and 138.2MB in the end (delta: 14.8MB). Peak memory consumption was 48.6MB. Max. memory is 8.0GB. [2022-04-05 01:21:04,302 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 175.1MB. Free memory is still 138.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 01:21:04,302 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.86ms. Allocated memory is still 175.1MB. Free memory was 152.7MB in the beginning and 151.1MB in the end (delta: 1.5MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. [2022-04-05 01:21:04,303 INFO L158 Benchmark]: Boogie Preprocessor took 41.60ms. Allocated memory is still 175.1MB. Free memory was 151.1MB in the beginning and 149.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 01:21:04,303 INFO L158 Benchmark]: RCFGBuilder took 251.30ms. Allocated memory is still 175.1MB. Free memory was 149.7MB in the beginning and 138.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 01:21:04,303 INFO L158 Benchmark]: IcfgTransformer took 33.00ms. Allocated memory is still 175.1MB. Free memory was 138.1MB in the beginning and 136.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 01:21:04,303 INFO L158 Benchmark]: TraceAbstraction took 1295.80ms. Allocated memory was 175.1MB in the beginning and 210.8MB in the end (delta: 35.7MB). Free memory was 136.0MB in the beginning and 138.2MB in the end (delta: -2.2MB). Peak memory consumption was 32.8MB. Max. memory is 8.0GB. [2022-04-05 01:21:04,305 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 175.1MB. Free memory is still 138.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 190.86ms. Allocated memory is still 175.1MB. Free memory was 152.7MB in the beginning and 151.1MB in the end (delta: 1.5MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.60ms. Allocated memory is still 175.1MB. Free memory was 151.1MB in the beginning and 149.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 251.30ms. Allocated memory is still 175.1MB. Free memory was 149.7MB in the beginning and 138.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 33.00ms. Allocated memory is still 175.1MB. Free memory was 138.1MB in the beginning and 136.8MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1295.80ms. Allocated memory was 175.1MB in the beginning and 210.8MB in the end (delta: 35.7MB). Free memory was 136.0MB in the beginning and 138.2MB in the end (delta: -2.2MB). Peak memory consumption was 32.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 166 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 163 mSDsluCounter, 115 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 28 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 495 IncrementalHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 87 mSDtfsCounter, 495 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 279 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-05 01:21:04,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...