/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_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 23:13:14,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 23:13:14,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 23:13:14,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 23:13:14,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 23:13:14,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 23:13:14,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 23:13:14,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 23:13:14,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 23:13:14,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 23:13:14,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 23:13:14,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 23:13:14,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 23:13:14,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 23:13:14,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 23:13:14,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 23:13:14,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 23:13:14,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 23:13:14,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 23:13:14,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 23:13:14,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 23:13:14,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 23:13:14,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 23:13:14,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 23:13:14,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 23:13:14,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 23:13:14,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 23:13:14,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 23:13:14,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 23:13:14,497 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 23:13:14,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 23:13:14,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 23:13:14,498 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 23:13:14,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 23:13:14,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 23:13:14,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 23:13:14,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 23:13:14,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 23:13:14,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 23:13:14,499 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 23:13:14,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 23:13:14,499 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 23:13:14,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 23:13:14,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 23:13:14,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 23:13:14,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 23:13:14,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 23:13:14,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:13:14,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 23:13:14,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 23:13:14,500 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 23:13:14,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 23:13:14,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 23:13:14,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 23:13:14,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 23:13:14,644 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 23:13:14,644 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 23:13:14,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-02-14 23:13:14,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4696e8750/d7e4d19ec5e7449ebb8232c60e36fde1/FLAG49dbd79e0 [2022-02-14 23:13:15,062 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 23:13:15,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound100.c [2022-02-14 23:13:15,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4696e8750/d7e4d19ec5e7449ebb8232c60e36fde1/FLAG49dbd79e0 [2022-02-14 23:13:15,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4696e8750/d7e4d19ec5e7449ebb8232c60e36fde1 [2022-02-14 23:13:15,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 23:13:15,077 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 23:13:15,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 23:13:15,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 23:13:15,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 23:13:15,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395d8796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15, skipping insertion in model container [2022-02-14 23:13:15,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 23:13:15,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 23:13:15,214 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_unwindbound100.c[537,550] [2022-02-14 23:13:15,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:13:15,247 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 23:13:15,258 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_unwindbound100.c[537,550] [2022-02-14 23:13:15,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:13:15,279 INFO L208 MainTranslator]: Completed translation [2022-02-14 23:13:15,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15 WrapperNode [2022-02-14 23:13:15,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 23:13:15,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 23:13:15,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 23:13:15,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 23:13:15,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 23:13:15,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 23:13:15,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 23:13:15,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 23:13:15,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:13:15,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:15,337 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) [2022-02-14 23:13:15,359 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 [2022-02-14 23:13:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 23:13:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 23:13:15,368 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 23:13:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 23:13:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 23:13:15,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 23:13:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 23:13:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 23:13:15,369 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 23:13:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 23:13:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 23:13:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 23:13:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 23:13:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 23:13:15,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 23:13:15,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 23:13:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 23:13:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 23:13:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 23:13:15,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 23:13:15,417 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 23:13:15,418 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 23:13:15,568 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 23:13:15,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 23:13:15,572 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 23:13:15,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:13:15 BoogieIcfgContainer [2022-02-14 23:13:15,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 23:13:15,574 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 23:13:15,574 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 23:13:15,575 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 23:13:15,577 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:13:15" (1/1) ... [2022-02-14 23:13:15,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:13:15 BasicIcfg [2022-02-14 23:13:15,589 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 23:13:15,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 23:13:15,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 23:13:15,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 23:13:15,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:13:15" (1/4) ... [2022-02-14 23:13:15,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbc006a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:13:15, skipping insertion in model container [2022-02-14 23:13:15,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:13:15" (2/4) ... [2022-02-14 23:13:15,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbc006a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:13:15, skipping insertion in model container [2022-02-14 23:13:15,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:13:15" (3/4) ... [2022-02-14 23:13:15,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbc006a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 11:13:15, skipping insertion in model container [2022-02-14 23:13:15,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:13:15" (4/4) ... [2022-02-14 23:13:15,593 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound100.cJordan [2022-02-14 23:13:15,597 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 23:13:15,597 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 23:13:15,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 23:13:15,627 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 23:13:15,627 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 23:13:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:13:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 23:13:15,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:15,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:15,645 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-02-14 23:13:15,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:15,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817050375] [2022-02-14 23:13:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:15,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:15,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:13:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:15,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:13:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:13:15,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:15,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817050375] [2022-02-14 23:13:15,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817050375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:13:15,835 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:13:15,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 23:13:15,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252663134] [2022-02-14 23:13:15,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:13:15,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 23:13:15,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 23:13:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:13:15,860 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 23:13:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:15,926 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-02-14 23:13:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 23:13:15,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-14 23:13:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:15,934 INFO L225 Difference]: With dead ends: 38 [2022-02-14 23:13:15,934 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 23:13:15,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:13:15,937 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:15,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:13:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 23:13:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-02-14 23:13:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 23:13:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-14 23:13:15,962 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-02-14 23:13:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:15,962 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-14 23:13:15,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 23:13:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-14 23:13:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 23:13:15,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:15,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:15,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 23:13:15,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-02-14 23:13:15,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:15,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243671640] [2022-02-14 23:13:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:15,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:16,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:13:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:16,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:13:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:13:16,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:16,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243671640] [2022-02-14 23:13:16,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243671640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:13:16,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:13:16,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:13:16,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410066574] [2022-02-14 23:13:16,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:13:16,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:13:16,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:13:16,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:13:16,097 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 23:13:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:16,257 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-02-14 23:13:16,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:13:16,257 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-14 23:13:16,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:16,259 INFO L225 Difference]: With dead ends: 45 [2022-02-14 23:13:16,259 INFO L226 Difference]: Without dead ends: 45 [2022-02-14 23:13:16,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:13:16,263 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:16,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:13:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-14 23:13:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-02-14 23:13:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 23:13:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-02-14 23:13:16,278 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-02-14 23:13:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:16,281 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-02-14 23:13:16,282 INFO L471 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 23:13:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-02-14 23:13:16,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-14 23:13:16,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:16,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:16,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 23:13:16,286 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:16,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-02-14 23:13:16,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:16,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442322516] [2022-02-14 23:13:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:16,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:16,295 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:16,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351655689] [2022-02-14 23:13:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:16,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:16,298 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) [2022-02-14 23:13:16,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 23:13:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 23:13:16,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:13:16,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:13:16,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:16,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442322516] [2022-02-14 23:13:16,426 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:16,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351655689] [2022-02-14 23:13:16,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351655689] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:13:16,426 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:13:16,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 23:13:16,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235982395] [2022-02-14 23:13:16,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:13:16,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 23:13:16,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 23:13:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 23:13:16,427 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 23:13:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:16,434 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-02-14 23:13:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 23:13:16,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-14 23:13:16,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:16,435 INFO L225 Difference]: With dead ends: 38 [2022-02-14 23:13:16,435 INFO L226 Difference]: Without dead ends: 38 [2022-02-14 23:13:16,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 23:13:16,436 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:16,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:13:16,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-14 23:13:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-14 23:13:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 23:13:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-02-14 23:13:16,439 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-02-14 23:13:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:16,439 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-02-14 23:13:16,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 23:13:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-02-14 23:13:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 23:13:16,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:16,440 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:16,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 23:13:16,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:16,657 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-02-14 23:13:16,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:16,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349767203] [2022-02-14 23:13:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:16,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:16,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:13:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:16,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:13:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:16,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-14 23:13:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:13:16,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:16,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349767203] [2022-02-14 23:13:16,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349767203] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:13:16,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:13:16,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:13:16,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445985606] [2022-02-14 23:13:16,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:13:16,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:13:16,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:13:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:13:16,753 INFO L87 Difference]: Start difference. First operand 38 states and 47 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 23:13:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:16,874 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-02-14 23:13:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:13:16,874 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-14 23:13:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:16,875 INFO L225 Difference]: With dead ends: 50 [2022-02-14 23:13:16,875 INFO L226 Difference]: Without dead ends: 50 [2022-02-14 23:13:16,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:13:16,876 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:16,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:13:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-14 23:13:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-02-14 23:13:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 23:13:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-02-14 23:13:16,880 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-02-14 23:13:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:16,880 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-02-14 23:13:16,880 INFO L471 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 23:13:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-02-14 23:13:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 23:13:16,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:16,881 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:16,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 23:13:16,881 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-02-14 23:13:16,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:16,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417100919] [2022-02-14 23:13:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:16,890 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:16,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391718072] [2022-02-14 23:13:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:16,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:16,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:16,891 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) [2022-02-14 23:13:16,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 23:13:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:16,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:13:16,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 23:13:17,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:13:17,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:17,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417100919] [2022-02-14 23:13:17,043 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:17,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391718072] [2022-02-14 23:13:17,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391718072] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:13:17,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:13:17,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:13:17,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777225688] [2022-02-14 23:13:17,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:13:17,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:13:17,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:17,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:13:17,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:13:17,045 INFO L87 Difference]: Start difference. First operand 42 states and 50 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:13:19,076 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 [] [2022-02-14 23:13:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:19,225 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-02-14 23:13:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:13:19,235 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-14 23:13:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:19,236 INFO L225 Difference]: With dead ends: 57 [2022-02-14 23:13:19,236 INFO L226 Difference]: Without dead ends: 56 [2022-02-14 23:13:19,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:13:19,237 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:19,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-14 23:13:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-14 23:13:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-14 23:13:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 23:13:19,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-02-14 23:13:19,242 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-02-14 23:13:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:19,242 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-02-14 23:13:19,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:13:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-02-14 23:13:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-14 23:13:19,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:19,243 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2022-02-14 23:13:19,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 23:13:19,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:19,459 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:19,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-02-14 23:13:19,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:19,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809235186] [2022-02-14 23:13:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:19,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:19,468 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:19,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146973394] [2022-02-14 23:13:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:19,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:19,469 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) [2022-02-14 23:13:19,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 23:13:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:19,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:13:19,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:13:19,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:13:19,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:19,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809235186] [2022-02-14 23:13:19,652 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:19,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146973394] [2022-02-14 23:13:19,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146973394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:13:19,653 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:13:19,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:13:19,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491208773] [2022-02-14 23:13:19,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:13:19,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:13:19,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:19,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:13:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:13:19,654 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 23:13:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:19,680 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-02-14 23:13:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:13:19,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-02-14 23:13:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:19,681 INFO L225 Difference]: With dead ends: 69 [2022-02-14 23:13:19,681 INFO L226 Difference]: Without dead ends: 69 [2022-02-14 23:13:19,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:13:19,682 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:19,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:13:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-14 23:13:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-02-14 23:13:19,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 23:13:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-02-14 23:13:19,686 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-02-14 23:13:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:19,687 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-02-14 23:13:19,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 23:13:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-02-14 23:13:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-14 23:13:19,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:19,688 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2022-02-14 23:13:19,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 23:13:19,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:19,904 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-02-14 23:13:19,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:19,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024561890] [2022-02-14 23:13:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:19,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:19,912 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:19,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001733594] [2022-02-14 23:13:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:19,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:19,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:19,914 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) [2022-02-14 23:13:19,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 23:13:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 23:13:19,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:13:20,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:13:20,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:20,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024561890] [2022-02-14 23:13:20,122 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:20,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001733594] [2022-02-14 23:13:20,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001733594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:13:20,122 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:13:20,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:13:20,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258118903] [2022-02-14 23:13:20,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:13:20,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:13:20,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:20,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:13:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:13:20,123 INFO L87 Difference]: Start difference. First operand 68 states and 79 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:13:20,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:20,253 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2022-02-14 23:13:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:13:20,254 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-14 23:13:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:20,255 INFO L225 Difference]: With dead ends: 80 [2022-02-14 23:13:20,255 INFO L226 Difference]: Without dead ends: 79 [2022-02-14 23:13:20,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 23:13:20,256 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:20,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:13:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-14 23:13:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-02-14 23:13:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 23:13:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-02-14 23:13:20,261 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-02-14 23:13:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:20,261 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-02-14 23:13:20,261 INFO L471 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:13:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-02-14 23:13:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-14 23:13:20,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:20,262 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2022-02-14 23:13:20,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 23:13:20,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:20,467 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-02-14 23:13:20,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:20,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594171818] [2022-02-14 23:13:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:20,476 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:20,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532242372] [2022-02-14 23:13:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:20,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:20,477 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) [2022-02-14 23:13:20,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 23:13:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:13:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:13:20,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:13:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:13:20,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:20,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594171818] [2022-02-14 23:13:20,705 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:20,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532242372] [2022-02-14 23:13:20,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532242372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:13:20,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:13:20,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 23:13:20,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098723266] [2022-02-14 23:13:20,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:13:20,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 23:13:20,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:20,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 23:13:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 23:13:20,707 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-14 23:13:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:20,852 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2022-02-14 23:13:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 23:13:20,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-02-14 23:13:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:20,854 INFO L225 Difference]: With dead ends: 146 [2022-02-14 23:13:20,854 INFO L226 Difference]: Without dead ends: 146 [2022-02-14 23:13:20,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:13:20,855 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 54 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:20,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 248 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:13:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-14 23:13:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-02-14 23:13:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 23:13:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-02-14 23:13:20,867 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-02-14 23:13:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:20,868 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-02-14 23:13:20,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-14 23:13:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-02-14 23:13:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-14 23:13:20,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:20,869 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:13:20,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 23:13:21,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:21,077 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:21,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-02-14 23:13:21,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:21,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833261496] [2022-02-14 23:13:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:21,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:21,086 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:21,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753720744] [2022-02-14 23:13:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:21,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:21,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:21,088 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:13:21,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 23:13:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:21,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 23:13:21,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 23:13:21,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:13:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 23:13:21,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:21,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833261496] [2022-02-14 23:13:21,596 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:21,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753720744] [2022-02-14 23:13:21,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753720744] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 23:13:21,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:13:21,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-14 23:13:21,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640234606] [2022-02-14 23:13:21,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:13:21,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:13:21,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:13:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:13:21,598 INFO L87 Difference]: Start difference. First operand 138 states and 166 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-14 23:13:23,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:13:25,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:13:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:25,930 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2022-02-14 23:13:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:13:25,931 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-02-14 23:13:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:25,932 INFO L225 Difference]: With dead ends: 160 [2022-02-14 23:13:25,932 INFO L226 Difference]: Without dead ends: 160 [2022-02-14 23:13:25,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 23:13:25,932 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:25,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 145 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-02-14 23:13:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-14 23:13:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-02-14 23:13:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 23:13:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-02-14 23:13:25,941 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-02-14 23:13:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:25,941 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-02-14 23:13:25,941 INFO L471 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-14 23:13:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-02-14 23:13:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 23:13:25,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:25,942 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1] [2022-02-14 23:13:25,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 23:13:26,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:26,146 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:26,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:26,147 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-02-14 23:13:26,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:26,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143236948] [2022-02-14 23:13:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:26,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:26,154 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:26,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732713372] [2022-02-14 23:13:26,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:26,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:26,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:13:26,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 23:13:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:13:26,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 23:13:26,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:13:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 23:13:26,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:13:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 23:13:26,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:13:26,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143236948] [2022-02-14 23:13:26,429 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:13:26,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732713372] [2022-02-14 23:13:26,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732713372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:13:26,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:13:26,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-14 23:13:26,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829021762] [2022-02-14 23:13:26,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:13:26,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 23:13:26,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:13:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 23:13:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:13:26,430 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-14 23:13:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:13:26,614 INFO L93 Difference]: Finished difference Result 257 states and 309 transitions. [2022-02-14 23:13:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 23:13:26,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-02-14 23:13:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:13:26,616 INFO L225 Difference]: With dead ends: 257 [2022-02-14 23:13:26,616 INFO L226 Difference]: Without dead ends: 257 [2022-02-14 23:13:26,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-14 23:13:26,617 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 102 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:13:26,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 250 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:13:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-14 23:13:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-02-14 23:13:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-14 23:13:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-02-14 23:13:26,628 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-02-14 23:13:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:13:26,628 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-02-14 23:13:26,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-14 23:13:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-02-14 23:13:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 23:13:26,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:13:26,645 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-02-14 23:13:26,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 23:13:26,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:26,863 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:13:26,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:13:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-02-14 23:13:26,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:13:26,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272254711] [2022-02-14 23:13:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:26,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:13:26,871 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:13:26,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430023429] [2022-02-14 23:13:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:13:26,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:13:26,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:13:26,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 23:13:26,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process