/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 21:35:10,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 21:35:10,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 21:35:10,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 21:35:10,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 21:35:10,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 21:35:10,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 21:35:10,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 21:35:10,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 21:35:10,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 21:35:10,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 21:35:10,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 21:35:10,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 21:35:10,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 21:35:10,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 21:35:10,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 21:35:10,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 21:35:10,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 21:35:10,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 21:35:10,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 21:35:10,527 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 21:35:10,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 21:35:10,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 21:35:10,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 21:35:10,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 21:35:10,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 21:35:10,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 21:35:10,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 21:35:10,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 21:35:10,542 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 21:35:10,567 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 21:35:10,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 21:35:10,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 21:35:10,569 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 21:35:10,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 21:35:10,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 21:35:10,570 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 21:35:10,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 21:35:10,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 21:35:10,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 21:35:10,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 21:35:10,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 21:35:10,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 21:35:10,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 21:35:10,571 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 21:35:10,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 21:35:10,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 21:35:10,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 21:35:10,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 21:35:10,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:35:10,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 21:35:10,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 21:35:10,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 21:35:10,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 21:35:10,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 21:35:10,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 21:35:10,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 21:35:10,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 21:35:10,574 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 21:35:10,574 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 21:35:10,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 21:35:10,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 21:35:10,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 21:35:10,809 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 21:35:10,811 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 21:35:10,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-03-17 21:35:10,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d83d4f0f/32e2014d68aa412688ef704b2ac0d5f0/FLAG291d56195 [2022-03-17 21:35:11,216 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 21:35:11,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-03-17 21:35:11,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d83d4f0f/32e2014d68aa412688ef704b2ac0d5f0/FLAG291d56195 [2022-03-17 21:35:11,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d83d4f0f/32e2014d68aa412688ef704b2ac0d5f0 [2022-03-17 21:35:11,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 21:35:11,238 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 21:35:11,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 21:35:11,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 21:35:11,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 21:35:11,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f882a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11, skipping insertion in model container [2022-03-17 21:35:11,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 21:35:11,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 21:35:11,400 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/egcd3-ll_valuebound50.c[490,503] [2022-03-17 21:35:11,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:35:11,422 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 21:35:11,433 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/egcd3-ll_valuebound50.c[490,503] [2022-03-17 21:35:11,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:35:11,450 INFO L208 MainTranslator]: Completed translation [2022-03-17 21:35:11,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11 WrapperNode [2022-03-17 21:35:11,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 21:35:11,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 21:35:11,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 21:35:11,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 21:35:11,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 21:35:11,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 21:35:11,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 21:35:11,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 21:35:11,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:35:11,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:11,515 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) [2022-03-17 21:35:11,517 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 [2022-03-17 21:35:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 21:35:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 21:35:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 21:35:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 21:35:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 21:35:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 21:35:11,542 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 21:35:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 21:35:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 21:35:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 21:35:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 21:35:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 21:35:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 21:35:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 21:35:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 21:35:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 21:35:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 21:35:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 21:35:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 21:35:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 21:35:11,589 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 21:35:11,590 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 21:35:11,710 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 21:35:11,715 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 21:35:11,716 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-17 21:35:11,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:35:11 BoogieIcfgContainer [2022-03-17 21:35:11,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 21:35:11,718 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 21:35:11,718 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 21:35:11,722 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 21:35:11,724 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:35:11" (1/1) ... [2022-03-17 21:35:11,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:35:11 BasicIcfg [2022-03-17 21:35:11,748 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 21:35:11,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 21:35:11,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 21:35:11,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 21:35:11,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:35:11" (1/4) ... [2022-03-17 21:35:11,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb2a6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:35:11, skipping insertion in model container [2022-03-17 21:35:11,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:35:11" (2/4) ... [2022-03-17 21:35:11,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb2a6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:35:11, skipping insertion in model container [2022-03-17 21:35:11,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:35:11" (3/4) ... [2022-03-17 21:35:11,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb2a6e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:35:11, skipping insertion in model container [2022-03-17 21:35:11,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:35:11" (4/4) ... [2022-03-17 21:35:11,768 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.cqvasr [2022-03-17 21:35:11,772 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 21:35:11,772 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 21:35:11,849 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 21:35:11,858 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 21:35:11,858 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 21:35:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 21:35:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 21:35:11,882 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:11,883 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:11,885 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-03-17 21:35:11,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:11,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769703453] [2022-03-17 21:35:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:12,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:35:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:12,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:35:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:12,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 21:35:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:12,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 21:35:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:12,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-17 21:35:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:35:12,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:12,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769703453] [2022-03-17 21:35:12,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769703453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:35:12,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:35:12,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 21:35:12,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014778332] [2022-03-17 21:35:12,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:12,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 21:35:12,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 21:35:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:35:12,128 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:35:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:12,197 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-17 21:35:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 21:35:12,200 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 21:35:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:12,206 INFO L225 Difference]: With dead ends: 73 [2022-03-17 21:35:12,206 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 21:35:12,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:35:12,212 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:12,213 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 21:35:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 21:35:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 21:35:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-17 21:35:12,276 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-17 21:35:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:12,276 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-17 21:35:12,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:35:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-17 21:35:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 21:35:12,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:12,278 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:12,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 21:35:12,278 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-03-17 21:35:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:12,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997489093] [2022-03-17 21:35:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:12,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:12,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285095139] [2022-03-17 21:35:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:12,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:12,331 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) [2022-03-17 21:35:12,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 21:35:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:35:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:35:12,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:35:12,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:12,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997489093] [2022-03-17 21:35:12,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285095139] [2022-03-17 21:35:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285095139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:35:12,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:35:12,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 21:35:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658021066] [2022-03-17 21:35:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:12,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:35:12,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:35:12,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:35:12,520 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:35:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:12,591 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-17 21:35:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:35:12,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-17 21:35:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:12,593 INFO L225 Difference]: With dead ends: 54 [2022-03-17 21:35:12,593 INFO L226 Difference]: Without dead ends: 47 [2022-03-17 21:35:12,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:35:12,595 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:12,596 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-17 21:35:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-17 21:35:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 21:35:12,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-17 21:35:12,607 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-17 21:35:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:12,607 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-17 21:35:12,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:35:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-17 21:35:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 21:35:12,609 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:12,609 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 21:35:12,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:12,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:12,820 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:12,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-03-17 21:35:12,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:12,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794508977] [2022-03-17 21:35:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:12,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:12,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:12,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918491316] [2022-03-17 21:35:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:12,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:12,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:12,849 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) [2022-03-17 21:35:12,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 21:35:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:12,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 21:35:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:35:13,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:35:13,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794508977] [2022-03-17 21:35:13,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:13,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918491316] [2022-03-17 21:35:13,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918491316] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:35:13,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:35:13,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 21:35:13,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320640223] [2022-03-17 21:35:13,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:13,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:35:13,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:13,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:35:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:35:13,327 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:35:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:13,376 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-17 21:35:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:35:13,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-03-17 21:35:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:13,380 INFO L225 Difference]: With dead ends: 53 [2022-03-17 21:35:13,380 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 21:35:13,381 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:35:13,384 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:13,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 21:35:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-17 21:35:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 21:35:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-17 21:35:13,399 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-17 21:35:13,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:13,400 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-17 21:35:13,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:35:13,400 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-17 21:35:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 21:35:13,401 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:13,401 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 21:35:13,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:13,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 21:35:13,611 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:13,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-03-17 21:35:13,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:13,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493656604] [2022-03-17 21:35:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:13,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:13,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:13,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826983789] [2022-03-17 21:35:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:13,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:13,637 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) [2022-03-17 21:35:13,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 21:35:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:13,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:35:13,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:35:13,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:35:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:13,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493656604] [2022-03-17 21:35:13,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:13,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826983789] [2022-03-17 21:35:13,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826983789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:35:13,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:35:13,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 21:35:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291053985] [2022-03-17 21:35:13,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:35:13,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 21:35:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 21:35:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:35:13,877 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:35:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:14,044 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-17 21:35:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 21:35:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-17 21:35:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:14,048 INFO L225 Difference]: With dead ends: 103 [2022-03-17 21:35:14,050 INFO L226 Difference]: Without dead ends: 96 [2022-03-17 21:35:14,050 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:35:14,057 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:14,057 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 295 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:35:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-17 21:35:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-17 21:35:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 21:35:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-17 21:35:14,082 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-17 21:35:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:14,083 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-17 21:35:14,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:35:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-17 21:35:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 21:35:14,085 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:14,086 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 21:35:14,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:14,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:14,308 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:14,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-03-17 21:35:14,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:14,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910566465] [2022-03-17 21:35:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:14,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:14,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:14,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986337260] [2022-03-17 21:35:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:14,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:14,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:14,340 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) [2022-03-17 21:35:14,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 21:35:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:14,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 21:35:14,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:35:14,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:35:14,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:14,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910566465] [2022-03-17 21:35:14,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:14,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986337260] [2022-03-17 21:35:14,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986337260] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:35:14,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:35:14,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-17 21:35:14,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887196027] [2022-03-17 21:35:14,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:14,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 21:35:14,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 21:35:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:35:14,931 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:35:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:15,001 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-17 21:35:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 21:35:15,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-17 21:35:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:15,003 INFO L225 Difference]: With dead ends: 79 [2022-03-17 21:35:15,003 INFO L226 Difference]: Without dead ends: 77 [2022-03-17 21:35:15,003 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-17 21:35:15,004 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:15,004 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-17 21:35:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-17 21:35:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 21:35:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-17 21:35:15,017 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-17 21:35:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:15,018 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-17 21:35:15,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:35:15,018 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-17 21:35:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 21:35:15,019 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:15,019 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 21:35:15,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:15,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:15,234 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:15,235 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-03-17 21:35:15,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:15,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419631179] [2022-03-17 21:35:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:15,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:15,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946256258] [2022-03-17 21:35:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:15,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:15,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:15,276 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) [2022-03-17 21:35:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 21:35:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:15,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-17 21:35:15,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:35:15,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:35:15,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:15,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419631179] [2022-03-17 21:35:15,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946256258] [2022-03-17 21:35:15,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946256258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:35:15,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:35:15,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-17 21:35:15,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965152461] [2022-03-17 21:35:15,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:35:15,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 21:35:15,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:15,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 21:35:15,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-17 21:35:15,830 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 21:35:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:16,254 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-03-17 21:35:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 21:35:16,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-03-17 21:35:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:16,256 INFO L225 Difference]: With dead ends: 118 [2022-03-17 21:35:16,256 INFO L226 Difference]: Without dead ends: 116 [2022-03-17 21:35:16,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-17 21:35:16,258 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:16,258 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 347 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 21:35:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-17 21:35:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-03-17 21:35:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 21:35:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-03-17 21:35:16,279 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-03-17 21:35:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:16,279 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-03-17 21:35:16,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 21:35:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-03-17 21:35:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 21:35:16,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:16,281 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:16,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:16,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:16,500 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-03-17 21:35:16,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:16,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611972501] [2022-03-17 21:35:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:16,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:16,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:16,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137158550] [2022-03-17 21:35:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:16,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:16,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:16,514 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) [2022-03-17 21:35:16,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 21:35:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:16,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:35:16,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 21:35:16,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:35:16,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:16,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611972501] [2022-03-17 21:35:16,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:16,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137158550] [2022-03-17 21:35:16,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137158550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:35:16,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:35:16,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:35:16,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762736582] [2022-03-17 21:35:16,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:16,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:35:16,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:35:16,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:35:16,646 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:35:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:16,698 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-03-17 21:35:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:35:16,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-17 21:35:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:16,700 INFO L225 Difference]: With dead ends: 151 [2022-03-17 21:35:16,700 INFO L226 Difference]: Without dead ends: 149 [2022-03-17 21:35:16,701 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:35:16,701 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:16,702 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-17 21:35:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-03-17 21:35:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-17 21:35:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-03-17 21:35:16,747 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-03-17 21:35:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:16,748 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-03-17 21:35:16,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:35:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-03-17 21:35:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 21:35:16,753 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:16,753 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:16,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:16,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:16,976 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-03-17 21:35:16,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:16,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352695010] [2022-03-17 21:35:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:16,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:16,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:16,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780541112] [2022-03-17 21:35:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:16,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:16,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:16,989 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) [2022-03-17 21:35:16,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 21:35:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:17,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-17 21:35:17,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:35:17,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:35:17,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:17,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352695010] [2022-03-17 21:35:17,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:17,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780541112] [2022-03-17 21:35:17,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780541112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:35:17,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:35:17,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-03-17 21:35:17,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039340259] [2022-03-17 21:35:17,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:35:17,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 21:35:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 21:35:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-17 21:35:17,580 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 21:35:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:18,148 INFO L93 Difference]: Finished difference Result 194 states and 277 transitions. [2022-03-17 21:35:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-17 21:35:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-03-17 21:35:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:18,155 INFO L225 Difference]: With dead ends: 194 [2022-03-17 21:35:18,155 INFO L226 Difference]: Without dead ends: 192 [2022-03-17 21:35:18,155 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-03-17 21:35:18,156 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:18,156 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 370 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 356 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-03-17 21:35:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-17 21:35:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 166. [2022-03-17 21:35:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 104 states have (on average 1.2692307692307692) internal successors, (132), 108 states have internal predecessors, (132), 53 states have call successors, (53), 9 states have call predecessors, (53), 8 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-17 21:35:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 236 transitions. [2022-03-17 21:35:18,184 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 236 transitions. Word has length 47 [2022-03-17 21:35:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:18,184 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 236 transitions. [2022-03-17 21:35:18,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 21:35:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 236 transitions. [2022-03-17 21:35:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 21:35:18,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:18,185 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:18,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:18,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:18,400 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-03-17 21:35:18,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:18,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35218384] [2022-03-17 21:35:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:18,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:18,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:18,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714081643] [2022-03-17 21:35:18,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:35:18,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:18,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:18,412 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) [2022-03-17 21:35:18,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 21:35:18,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:35:18,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:35:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 21:35:18,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:35:18,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:35:18,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35218384] [2022-03-17 21:35:18,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714081643] [2022-03-17 21:35:18,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714081643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:35:18,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:35:18,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:35:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181353493] [2022-03-17 21:35:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:18,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:35:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:18,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:35:18,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:35:18,527 INFO L87 Difference]: Start difference. First operand 166 states and 236 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:35:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:18,602 INFO L93 Difference]: Finished difference Result 212 states and 296 transitions. [2022-03-17 21:35:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:35:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-17 21:35:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:18,603 INFO L225 Difference]: With dead ends: 212 [2022-03-17 21:35:18,603 INFO L226 Difference]: Without dead ends: 136 [2022-03-17 21:35:18,604 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 21:35:18,605 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:18,605 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-17 21:35:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2022-03-17 21:35:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 72 states have internal predecessors, (82), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-17 21:35:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2022-03-17 21:35:18,639 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 47 [2022-03-17 21:35:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:18,639 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2022-03-17 21:35:18,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:35:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2022-03-17 21:35:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-17 21:35:18,640 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:18,640 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2022-03-17 21:35:18,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:18,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 21:35:18,848 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:18,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-03-17 21:35:18,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242498571] [2022-03-17 21:35:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:18,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:18,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:18,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204946528] [2022-03-17 21:35:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:18,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:18,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:35:18,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 21:35:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:35:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 21:35:19,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:35:19,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:19,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242498571] [2022-03-17 21:35:19,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:19,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204946528] [2022-03-17 21:35:19,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204946528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:35:19,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:35:19,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:35:19,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202555926] [2022-03-17 21:35:19,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:19,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:35:19,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:19,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:35:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:35:19,013 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:35:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:19,074 INFO L93 Difference]: Finished difference Result 163 states and 230 transitions. [2022-03-17 21:35:19,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:35:19,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-17 21:35:19,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:19,076 INFO L225 Difference]: With dead ends: 163 [2022-03-17 21:35:19,076 INFO L226 Difference]: Without dead ends: 161 [2022-03-17 21:35:19,076 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:35:19,077 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:19,077 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-17 21:35:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 144. [2022-03-17 21:35:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 85 states have internal predecessors, (90), 57 states have call successors, (57), 10 states have call predecessors, (57), 9 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-17 21:35:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 202 transitions. [2022-03-17 21:35:19,107 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 202 transitions. Word has length 52 [2022-03-17 21:35:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:19,108 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 202 transitions. [2022-03-17 21:35:19,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:35:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 202 transitions. [2022-03-17 21:35:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 21:35:19,109 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:19,109 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:19,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:19,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 21:35:19,325 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-03-17 21:35:19,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:19,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140545932] [2022-03-17 21:35:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:19,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:19,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:19,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166598186] [2022-03-17 21:35:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:19,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:19,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:19,337 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:35:19,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 21:35:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:19,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-17 21:35:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-17 21:35:19,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-17 21:35:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:20,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140545932] [2022-03-17 21:35:20,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:20,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166598186] [2022-03-17 21:35:20,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166598186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:35:20,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:35:20,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-17 21:35:20,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25088040] [2022-03-17 21:35:20,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:35:20,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 21:35:20,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 21:35:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-17 21:35:20,201 INFO L87 Difference]: Start difference. First operand 144 states and 202 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:35:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:24,384 INFO L93 Difference]: Finished difference Result 331 states and 487 transitions. [2022-03-17 21:35:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 21:35:24,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-03-17 21:35:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:24,387 INFO L225 Difference]: With dead ends: 331 [2022-03-17 21:35:24,387 INFO L226 Difference]: Without dead ends: 326 [2022-03-17 21:35:24,388 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 21:35:24,388 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 148 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:24,389 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 488 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-17 21:35:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-17 21:35:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-03-17 21:35:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-17 21:35:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 351 transitions. [2022-03-17 21:35:24,453 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 351 transitions. Word has length 64 [2022-03-17 21:35:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:24,453 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 351 transitions. [2022-03-17 21:35:24,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:35:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 351 transitions. [2022-03-17 21:35:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-17 21:35:24,454 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:24,454 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:24,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:24,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 21:35:24,675 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:24,676 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-03-17 21:35:24,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:24,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108820306] [2022-03-17 21:35:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:24,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:24,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:24,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655860511] [2022-03-17 21:35:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:24,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:24,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:24,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:35:24,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 21:35:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 21:35:24,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-17 21:35:24,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-17 21:35:25,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:25,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108820306] [2022-03-17 21:35:25,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:25,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655860511] [2022-03-17 21:35:25,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655860511] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:35:25,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:35:25,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-17 21:35:25,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548736087] [2022-03-17 21:35:25,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:25,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:35:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:35:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 21:35:25,042 INFO L87 Difference]: Start difference. First operand 250 states and 351 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 21:35:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:25,134 INFO L93 Difference]: Finished difference Result 256 states and 356 transitions. [2022-03-17 21:35:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:35:25,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-03-17 21:35:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:25,138 INFO L225 Difference]: With dead ends: 256 [2022-03-17 21:35:25,138 INFO L226 Difference]: Without dead ends: 254 [2022-03-17 21:35:25,140 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:35:25,140 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:25,141 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-17 21:35:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-17 21:35:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-17 21:35:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2022-03-17 21:35:25,205 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 74 [2022-03-17 21:35:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:25,206 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2022-03-17 21:35:25,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 21:35:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2022-03-17 21:35:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 21:35:25,206 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:25,207 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:25,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-17 21:35:25,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 21:35:25,431 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:25,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-03-17 21:35:25,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:25,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164878623] [2022-03-17 21:35:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:25,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:25,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:25,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827164644] [2022-03-17 21:35:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:25,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:25,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:25,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:35:25,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 21:35:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:25,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-17 21:35:25,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 21:35:25,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 21:35:25,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164878623] [2022-03-17 21:35:25,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:25,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827164644] [2022-03-17 21:35:25,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827164644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:35:25,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:35:25,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-17 21:35:25,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124554874] [2022-03-17 21:35:25,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:35:25,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 21:35:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 21:35:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-17 21:35:25,964 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:35:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:26,395 INFO L93 Difference]: Finished difference Result 323 states and 461 transitions. [2022-03-17 21:35:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 21:35:26,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-03-17 21:35:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:26,397 INFO L225 Difference]: With dead ends: 323 [2022-03-17 21:35:26,397 INFO L226 Difference]: Without dead ends: 321 [2022-03-17 21:35:26,397 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-17 21:35:26,398 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 73 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:26,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 332 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 21:35:26,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-17 21:35:26,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 258. [2022-03-17 21:35:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 159 states have internal predecessors, (181), 89 states have call successors, (89), 17 states have call predecessors, (89), 16 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-17 21:35:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 357 transitions. [2022-03-17 21:35:26,462 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 357 transitions. Word has length 72 [2022-03-17 21:35:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:26,463 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 357 transitions. [2022-03-17 21:35:26,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:35:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 357 transitions. [2022-03-17 21:35:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 21:35:26,468 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:26,468 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:26,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 21:35:26,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 21:35:26,691 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:26,692 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-03-17 21:35:26,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:26,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46287671] [2022-03-17 21:35:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:26,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:26,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:26,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905832416] [2022-03-17 21:35:26,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:35:26,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:26,704 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:35:26,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 21:35:26,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:35:26,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:35:26,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 21:35:26,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 21:35:26,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:35:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:26,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46287671] [2022-03-17 21:35:26,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:26,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905832416] [2022-03-17 21:35:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905832416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:35:26,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:35:26,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:35:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410989745] [2022-03-17 21:35:26,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:35:26,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:35:26,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:35:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:35:26,879 INFO L87 Difference]: Start difference. First operand 258 states and 357 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 21:35:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:26,979 INFO L93 Difference]: Finished difference Result 444 states and 610 transitions. [2022-03-17 21:35:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:35:26,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-17 21:35:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:26,981 INFO L225 Difference]: With dead ends: 444 [2022-03-17 21:35:26,981 INFO L226 Difference]: Without dead ends: 266 [2022-03-17 21:35:26,983 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:35:26,983 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:26,984 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:35:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-17 21:35:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 257. [2022-03-17 21:35:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 161 states have internal predecessors, (187), 81 states have call successors, (81), 17 states have call predecessors, (81), 16 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-17 21:35:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 347 transitions. [2022-03-17 21:35:27,077 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 347 transitions. Word has length 77 [2022-03-17 21:35:27,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:27,077 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 347 transitions. [2022-03-17 21:35:27,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 21:35:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 347 transitions. [2022-03-17 21:35:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 21:35:27,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:27,078 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:27,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-17 21:35:27,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 21:35:27,279 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-03-17 21:35:27,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:27,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998094281] [2022-03-17 21:35:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:27,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:27,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:27,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937680972] [2022-03-17 21:35:27,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:35:27,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:27,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:27,289 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:35:27,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 21:35:27,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 21:35:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:35:27,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-17 21:35:27,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 21:35:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:35:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 21:35:29,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:35:29,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998094281] [2022-03-17 21:35:29,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:35:29,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937680972] [2022-03-17 21:35:29,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937680972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:35:29,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:35:29,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-03-17 21:35:29,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253095429] [2022-03-17 21:35:29,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:35:29,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 21:35:29,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:35:29,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 21:35:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-03-17 21:35:29,245 INFO L87 Difference]: Start difference. First operand 257 states and 347 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-17 21:35:40,626 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 [] [2022-03-17 21:35:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:35:53,803 INFO L93 Difference]: Finished difference Result 424 states and 583 transitions. [2022-03-17 21:35:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-17 21:35:53,803 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 77 [2022-03-17 21:35:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:35:53,807 INFO L225 Difference]: With dead ends: 424 [2022-03-17 21:35:53,807 INFO L226 Difference]: Without dead ends: 422 [2022-03-17 21:35:53,809 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2022-03-17 21:35:53,810 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 258 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 434 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-03-17 21:35:53,810 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 718 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 949 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2022-03-17 21:35:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-03-17 21:35:53,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 359. [2022-03-17 21:35:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 218 states have (on average 1.1926605504587156) internal successors, (260), 219 states have internal predecessors, (260), 119 states have call successors, (119), 22 states have call predecessors, (119), 21 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-03-17 21:35:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 496 transitions. [2022-03-17 21:35:53,908 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 496 transitions. Word has length 77 [2022-03-17 21:35:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:35:53,908 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 496 transitions. [2022-03-17 21:35:53,908 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-17 21:35:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 496 transitions. [2022-03-17 21:35:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 21:35:53,909 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:35:53,909 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:35:53,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-17 21:35:54,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:54,110 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:35:54,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:35:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-03-17 21:35:54,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:35:54,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242262617] [2022-03-17 21:35:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:54,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:35:54,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:35:54,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777164259] [2022-03-17 21:35:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:35:54,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:35:54,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:35:54,124 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:35:54,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 21:35:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:35:54,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-17 21:35:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:35:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 21:35:55,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:36:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 73 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-17 21:36:08,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:36:08,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242262617] [2022-03-17 21:36:08,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:36:08,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777164259] [2022-03-17 21:36:08,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777164259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:36:08,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:36:08,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-17 21:36:08,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129644622] [2022-03-17 21:36:08,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:36:08,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 21:36:08,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:36:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 21:36:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-03-17 21:36:08,083 INFO L87 Difference]: Start difference. First operand 359 states and 496 transitions. Second operand has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-17 21:36:15,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:36:16,410 INFO L93 Difference]: Finished difference Result 470 states and 642 transitions. [2022-03-17 21:36:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-17 21:36:16,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 91 [2022-03-17 21:36:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:36:16,413 INFO L225 Difference]: With dead ends: 470 [2022-03-17 21:36:16,413 INFO L226 Difference]: Without dead ends: 466 [2022-03-17 21:36:16,414 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=503, Invalid=2047, Unknown=0, NotChecked=0, Total=2550 [2022-03-17 21:36:16,414 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 140 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:36:16,414 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 476 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-03-17 21:36:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-03-17 21:36:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 370. [2022-03-17 21:36:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 213 states have (on average 1.192488262910798) internal successors, (254), 213 states have internal predecessors, (254), 130 states have call successors, (130), 27 states have call predecessors, (130), 26 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2022-03-17 21:36:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 513 transitions. [2022-03-17 21:36:16,550 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 513 transitions. Word has length 91 [2022-03-17 21:36:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:36:16,551 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 513 transitions. [2022-03-17 21:36:16,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-17 21:36:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 513 transitions. [2022-03-17 21:36:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-17 21:36:16,553 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:36:16,553 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:36:16,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 21:36:16,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 21:36:16,776 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:36:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:36:16,776 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-03-17 21:36:16,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:36:16,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858708890] [2022-03-17 21:36:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:36:16,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:36:16,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:36:16,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891329669] [2022-03-17 21:36:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:36:16,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:36:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:36:16,785 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:36:16,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 21:36:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:36:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 21:36:16,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:36:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-17 21:36:17,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:36:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-17 21:36:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:36:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858708890] [2022-03-17 21:36:18,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:36:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891329669] [2022-03-17 21:36:18,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891329669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:36:18,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:36:18,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-17 21:36:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178076620] [2022-03-17 21:36:18,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:36:18,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 21:36:18,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:36:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 21:36:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-17 21:36:18,017 INFO L87 Difference]: Start difference. First operand 370 states and 513 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 21:36:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:36:19,653 INFO L93 Difference]: Finished difference Result 897 states and 1392 transitions. [2022-03-17 21:36:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 21:36:19,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-03-17 21:36:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:36:19,657 INFO L225 Difference]: With dead ends: 897 [2022-03-17 21:36:19,657 INFO L226 Difference]: Without dead ends: 895 [2022-03-17 21:36:19,658 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-03-17 21:36:19,658 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 80 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-17 21:36:19,658 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 507 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-17 21:36:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-03-17 21:36:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 823. [2022-03-17 21:36:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 395 states have (on average 1.3063291139240507) internal successors, (516), 395 states have internal predecessors, (516), 398 states have call successors, (398), 30 states have call predecessors, (398), 29 states have return successors, (397), 397 states have call predecessors, (397), 397 states have call successors, (397) [2022-03-17 21:36:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1311 transitions. [2022-03-17 21:36:19,964 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1311 transitions. Word has length 94 [2022-03-17 21:36:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:36:19,964 INFO L478 AbstractCegarLoop]: Abstraction has 823 states and 1311 transitions. [2022-03-17 21:36:19,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 21:36:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1311 transitions. [2022-03-17 21:36:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-17 21:36:19,966 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:36:19,966 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:36:19,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 21:36:20,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 21:36:20,179 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:36:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:36:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-03-17 21:36:20,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:36:20,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118806634] [2022-03-17 21:36:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:36:20,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:36:20,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:36:20,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360960029] [2022-03-17 21:36:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:36:20,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:36:20,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:36:20,190 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:36:20,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 21:36:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:36:20,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-17 21:36:20,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:36:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 21:36:20,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:36:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-17 21:36:21,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:36:21,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118806634] [2022-03-17 21:36:21,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:36:21,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360960029] [2022-03-17 21:36:21,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360960029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:36:21,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:36:21,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-17 21:36:21,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318836021] [2022-03-17 21:36:21,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:36:21,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 21:36:21,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:36:21,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 21:36:21,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-17 21:36:21,290 INFO L87 Difference]: Start difference. First operand 823 states and 1311 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-17 21:36:25,612 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 [] [2022-03-17 21:36:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:36:29,250 INFO L93 Difference]: Finished difference Result 934 states and 1497 transitions. [2022-03-17 21:36:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 21:36:29,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) Word has length 94 [2022-03-17 21:36:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:36:29,251 INFO L225 Difference]: With dead ends: 934 [2022-03-17 21:36:29,251 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 21:36:29,254 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-03-17 21:36:29,254 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 90 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 223 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:36:29,254 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 435 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 492 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-03-17 21:36:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 21:36:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 21:36:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 21:36:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 21:36:29,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2022-03-17 21:36:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:36:29,256 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 21:36:29,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-17 21:36:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 21:36:29,256 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 21:36:29,258 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 21:36:29,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-17 21:36:29,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 21:36:29,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 21:36:35,228 WARN L232 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 459 DAG size of output: 464 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-17 21:36:40,452 WARN L232 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 463 DAG size of output: 460 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-17 21:36:50,157 WARN L232 SmtUtils]: Spent 9.70s on a formula simplification. DAG size of input: 408 DAG size of output: 403 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-17 21:36:55,247 WARN L232 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 464 DAG size of output: 463 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-17 21:37:02,207 WARN L232 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 480 DAG size of output: 468 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-17 21:37:09,138 WARN L232 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 480 DAG size of output: 468 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-17 21:37:23,322 WARN L232 SmtUtils]: Spent 13.03s on a formula simplification. DAG size of input: 166 DAG size of output: 54 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-17 21:38:16,605 WARN L232 SmtUtils]: Spent 53.28s on a formula simplification. DAG size of input: 387 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-17 21:39:30,209 WARN L232 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 383 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-17 21:39:45,297 WARN L232 SmtUtils]: Spent 15.08s on a formula simplification. DAG size of input: 329 DAG size of output: 65 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-17 21:40:34,806 WARN L232 SmtUtils]: Spent 49.51s on a formula simplification. DAG size of input: 386 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-17 21:41:35,145 WARN L232 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 396 DAG size of output: 53 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-17 21:42:20,210 WARN L232 SmtUtils]: Spent 45.06s on a formula simplification. DAG size of input: 396 DAG size of output: 53 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-17 21:42:20,213 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 21:42:20,213 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 21:42:20,213 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 21:42:20,213 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 21:42:20,213 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 21:42:20,213 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 21:42:20,213 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 21:42:20,213 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-03-17 21:42:20,213 INFO L882 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-03-17 21:42:20,213 INFO L882 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-03-17 21:42:20,213 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-03-17 21:42:20,213 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2022-03-17 21:42:20,213 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-03-17 21:42:20,213 INFO L882 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-03-17 21:42:20,214 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-17 21:42:20,214 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 50)) [2022-03-17 21:42:20,214 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 50)) [2022-03-17 21:42:20,214 INFO L882 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-03-17 21:42:20,214 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse1 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~a~0 .cse1)) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (or (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (not (<= (* main_~b~0 3) main_~c~0)) (<= (* main_~b~0 4) main_~c~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 (or (= .cse1 (+ (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0))) (<= main_~b~0 main_~c~0)) .cse2 .cse3) (and (= main_~s~0 1) .cse0 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-03-17 21:42:20,214 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse0 (* main_~q~0 main_~x~0)) (.cse1 (* main_~y~0 main_~s~0))) (let ((.cse2 (= main_~b~0 (+ .cse0 .cse1)))) (and (< main_~b~0 main_~a~0) (<= 1 main_~x~0) (= (+ .cse0 main_~a~0 .cse1) (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (or .cse2 (= main_~b~0 0)) (or .cse2 (<= main_~b~0 main_~c~0)) (<= 1 main_~y~0) (<= main_~y~0 50)))) [2022-03-17 21:42:20,214 INFO L882 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2022-03-17 21:42:20,214 INFO L882 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2022-03-17 21:42:20,214 INFO L878 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse15 (* main_~y~0 main_~r~0)) (.cse16 (* main_~p~0 main_~x~0)) (.cse12 (* main_~q~0 main_~x~0)) (.cse11 (* main_~y~0 main_~s~0))) (let ((.cse17 (= main_~b~0 (+ .cse12 .cse11))) (.cse18 (<= 1 main_~x~0)) (.cse0 (= main_~k~0 0)) (.cse10 (= main_~v~0 (* main_~d~0 main_~b~0))) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~a~0 (+ .cse15 .cse16))) (.cse13 (* main_~k~0 main_~y~0 main_~s~0)) (.cse14 (* main_~q~0 main_~k~0 main_~x~0)) (.cse3 (<= 1 main_~a~0)) (.cse4 (= main_~b~0 main_~y~0)) (.cse5 (= main_~q~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (= main_~a~0 main_~x~0)) (.cse8 (<= main_~y~0 50)) (.cse9 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (= main_~c~0 main_~x~0) .cse8 .cse9) (and (< main_~b~0 main_~a~0) .cse10 (= (+ (* 2 .cse11) (* .cse12 2) .cse13 main_~c~0 .cse14) (+ .cse15 .cse16 (* main_~b~0 2))) .cse17 .cse18 .cse2 .cse6 .cse8) (and (= main_~c~0 main_~a~0) .cse17 .cse18 .cse0 .cse2 (< main_~b~0 main_~c~0) .cse6 .cse8) (and .cse10 .cse1 .cse2 (= (+ (* main_~d~0 main_~y~0 main_~s~0) .cse13 main_~c~0 .cse14 (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse15 main_~v~0 .cse16)) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9)))) [2022-03-17 21:42:20,214 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2022-03-17 21:42:20,214 INFO L882 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2022-03-17 21:42:20,214 INFO L882 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2022-03-17 21:42:20,215 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2022-03-17 21:42:20,215 INFO L878 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-03-17 21:42:20,215 INFO L882 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2022-03-17 21:42:20,215 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-03-17 21:42:20,215 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse1 (= main_~a~0 (+ .cse4 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse1 .cse2 .cse3) (and .cse0 (= main_~s~0 1) .cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5)) (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-03-17 21:42:20,215 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ .cse4 .cse5))) (.cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse0 .cse1 .cse2 .cse3) (and (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0))) (= main_~s~0 1) .cse0 .cse1 (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-03-17 21:42:20,215 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~r~0)) (.cse5 (* main_~p~0 main_~x~0))) (let ((.cse0 (= main_~a~0 (+ main_~c~0 (* main_~b~0 main_~k~0)))) (.cse1 (= main_~a~0 (+ .cse4 .cse5))) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 50))) (or (and (< main_~b~0 main_~a~0) (= main_~v~0 (* main_~d~0 main_~b~0)) .cse0 (= main_~b~0 (+ (* main_~q~0 main_~x~0) (* main_~y~0 main_~s~0))) (<= 1 main_~x~0) .cse1 .cse2 .cse3) (and .cse0 (= main_~s~0 1) .cse1 (= (+ (* main_~d~0 main_~y~0 main_~s~0) (* main_~k~0 main_~y~0 main_~s~0) main_~c~0 (* main_~q~0 main_~k~0 main_~x~0) (* main_~d~0 main_~q~0 main_~x~0)) (+ .cse4 main_~v~0 .cse5)) (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 (= main_~a~0 main_~x~0) .cse3 (= main_~p~0 1))))) [2022-03-17 21:42:20,215 INFO L882 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2022-03-17 21:42:20,215 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-03-17 21:42:20,215 INFO L882 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-03-17 21:42:20,215 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-03-17 21:42:20,216 INFO L882 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-03-17 21:42:20,216 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-03-17 21:42:20,216 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-03-17 21:42:20,218 INFO L718 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:42:20,219 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 21:42:20,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:42:20 BasicIcfg [2022-03-17 21:42:20,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 21:42:20,236 INFO L158 Benchmark]: Toolchain (without parser) took 428997.38ms. Allocated memory was 199.2MB in the beginning and 393.2MB in the end (delta: 194.0MB). Free memory was 141.9MB in the beginning and 330.0MB in the end (delta: -188.1MB). Peak memory consumption was 216.8MB. Max. memory is 8.0GB. [2022-03-17 21:42:20,236 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 199.2MB. Free memory is still 157.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 21:42:20,236 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.66ms. Allocated memory was 199.2MB in the beginning and 272.6MB in the end (delta: 73.4MB). Free memory was 141.7MB in the beginning and 241.6MB in the end (delta: -99.9MB). Peak memory consumption was 9.1MB. Max. memory is 8.0GB. [2022-03-17 21:42:20,237 INFO L158 Benchmark]: Boogie Preprocessor took 23.29ms. Allocated memory is still 272.6MB. Free memory was 241.6MB in the beginning and 240.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 21:42:20,237 INFO L158 Benchmark]: RCFGBuilder took 240.65ms. Allocated memory is still 272.6MB. Free memory was 240.2MB in the beginning and 229.0MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 21:42:20,237 INFO L158 Benchmark]: IcfgTransformer took 30.47ms. Allocated memory is still 272.6MB. Free memory was 229.0MB in the beginning and 227.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 21:42:20,237 INFO L158 Benchmark]: TraceAbstraction took 428485.53ms. Allocated memory was 272.6MB in the beginning and 393.2MB in the end (delta: 120.6MB). Free memory was 226.9MB in the beginning and 330.0MB in the end (delta: -103.1MB). Peak memory consumption was 228.7MB. Max. memory is 8.0GB. [2022-03-17 21:42:20,239 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 199.2MB. Free memory is still 157.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 211.66ms. Allocated memory was 199.2MB in the beginning and 272.6MB in the end (delta: 73.4MB). Free memory was 141.7MB in the beginning and 241.6MB in the end (delta: -99.9MB). Peak memory consumption was 9.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.29ms. Allocated memory is still 272.6MB. Free memory was 241.6MB in the beginning and 240.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 240.65ms. Allocated memory is still 272.6MB. Free memory was 240.2MB in the beginning and 229.0MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 30.47ms. Allocated memory is still 272.6MB. Free memory was 229.0MB in the beginning and 227.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 428485.53ms. Allocated memory was 272.6MB in the beginning and 393.2MB in the end (delta: 120.6MB). Free memory was 226.9MB in the beginning and 330.0MB in the end (delta: -103.1MB). Peak memory consumption was 228.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 428.4s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 49.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 350.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 1257 SdHoareTripleChecker+Valid, 27.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1193 mSDsluCounter, 5272 SdHoareTripleChecker+Invalid, 27.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 66 IncrementalHoareTripleChecker+Unchecked, 4353 mSDsCounter, 1662 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4958 IncrementalHoareTripleChecker+Invalid, 6688 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1662 mSolverCounterUnsat, 919 mSDtfsCounter, 4958 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1974 GetRequests, 1626 SyntacticMatches, 19 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 22.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=823occurred in iteration=17, InterpolantAutomatonStates: 253, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 500 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 565 PreInvPairs, 1180 NumberOfFragments, 1024 HoareAnnotationTreeSize, 565 FomulaSimplifications, 411072 FormulaSimplificationTreeSizeReduction, 39.7s HoareSimplificationTime, 18 FomulaSimplificationsInter, 767292 FormulaSimplificationTreeSizeReductionInter, 311.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 22.4s InterpolantComputationTime, 1063 NumberOfCodeBlocks, 1042 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1806 ConstructedInterpolants, 3 QuantifiedInterpolants, 9337 SizeOfPredicates, 100 NumberOfNonLiveVariables, 2865 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 2231/2489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((b < a && v == d * b) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= y) && y <= 50) || ((((((((((a == c + b * k && s == 1) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 50) && p == 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((b < a && ((a == c + b * k || !(b * 3 <= c)) || b * 4 <= c)) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && (y * r + p * x == k * y * s + c + q * k * x || b <= c)) && 1 <= y) && y <= 50) || ((((((((s == 1 && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 50) && p == 1) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((k == 0 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && c == x) && y <= 50) && p == 1) || (((((((b < a && v == d * b) && 2 * (y * s) + q * x * 2 + k * y * s + c + q * k * x == y * r + p * x + b * 2) && b == q * x + y * s) && 1 <= x) && a == y * r + p * x) && 1 <= y) && y <= 50)) || (((((((c == a && b == q * x + y * s) && 1 <= x) && k == 0) && a == y * r + p * x) && b < c) && 1 <= y) && y <= 50)) || ((((((((((v == d * b && s == 1) && a == y * r + p * x) && d * y * s + k * y * s + c + q * k * x + d * q * x == y * r + v + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && y <= 50) && p == 1) RESULT: Ultimate proved your program to be correct! [2022-03-17 21:42:20,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...