/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/hard-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 21:44:59,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 21:44:59,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 21:44:59,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 21:44:59,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 21:44:59,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 21:44:59,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 21:44:59,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 21:44:59,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 21:44:59,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 21:44:59,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 21:44:59,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 21:44:59,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 21:44:59,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 21:44:59,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 21:44:59,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 21:44:59,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 21:44:59,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 21:44:59,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 21:44:59,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 21:44:59,463 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 21:44:59,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 21:44:59,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 21:44:59,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 21:44:59,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 21:44:59,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 21:44:59,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 21:44:59,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 21:44:59,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 21:44:59,479 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 21:44:59,500 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 21:44:59,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 21:44:59,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 21:44:59,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 21:44:59,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 21:44:59,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 21:44:59,503 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 21:44:59,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 21:44:59,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 21:44:59,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 21:44:59,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 21:44:59,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 21:44:59,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 21:44:59,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 21:44:59,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 21:44:59,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 21:44:59,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 21:44:59,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 21:44:59,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 21:44:59,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:44:59,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 21:44:59,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 21:44:59,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 21:44:59,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 21:44:59,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 21:44:59,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 21:44:59,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 21:44:59,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 21:44:59,507 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 21:44:59,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 21:44:59,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 21:44:59,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 21:44:59,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 21:44:59,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 21:44:59,728 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 21:44:59,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c [2022-03-17 21:44:59,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b01bd70b/bd9d038e7459449997ba1009673b21a6/FLAG8c1ceb864 [2022-03-17 21:45:00,117 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 21:45:00,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c [2022-03-17 21:45:00,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b01bd70b/bd9d038e7459449997ba1009673b21a6/FLAG8c1ceb864 [2022-03-17 21:45:00,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b01bd70b/bd9d038e7459449997ba1009673b21a6 [2022-03-17 21:45:00,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 21:45:00,133 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 21:45:00,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 21:45:00,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 21:45:00,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 21:45:00,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4736ea77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00, skipping insertion in model container [2022-03-17 21:45:00,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 21:45:00,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 21:45:00,263 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c[538,551] [2022-03-17 21:45:00,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:45:00,280 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 21:45:00,288 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c[538,551] [2022-03-17 21:45:00,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:45:00,300 INFO L208 MainTranslator]: Completed translation [2022-03-17 21:45:00,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00 WrapperNode [2022-03-17 21:45:00,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 21:45:00,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 21:45:00,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 21:45:00,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 21:45:00,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 21:45:00,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 21:45:00,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 21:45:00,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 21:45:00,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:45:00,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:00,357 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 21:45:00,362 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 21:45:00,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 21:45:00,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 21:45:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 21:45:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 21:45:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 21:45:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 21:45:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 21:45:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 21:45:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 21:45:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 21:45:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 21:45:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 21:45:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 21:45:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 21:45:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 21:45:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 21:45:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 21:45:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 21:45:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 21:45:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 21:45:00,429 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 21:45:00,431 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 21:45:00,561 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 21:45:00,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 21:45:00,566 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 21:45:00,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:45:00 BoogieIcfgContainer [2022-03-17 21:45:00,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 21:45:00,568 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 21:45:00,568 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 21:45:00,569 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 21:45:00,571 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:45:00" (1/1) ... [2022-03-17 21:45:00,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:45:00 BasicIcfg [2022-03-17 21:45:00,588 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 21:45:00,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 21:45:00,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 21:45:00,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 21:45:00,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:45:00" (1/4) ... [2022-03-17 21:45:00,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311a2aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:45:00, skipping insertion in model container [2022-03-17 21:45:00,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:45:00" (2/4) ... [2022-03-17 21:45:00,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311a2aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:45:00, skipping insertion in model container [2022-03-17 21:45:00,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:45:00" (3/4) ... [2022-03-17 21:45:00,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311a2aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:45:00, skipping insertion in model container [2022-03-17 21:45:00,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:45:00" (4/4) ... [2022-03-17 21:45:00,598 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.cqvasr [2022-03-17 21:45:00,601 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 21:45:00,601 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 21:45:00,644 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 21:45:00,650 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 21:45:00,650 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 21:45:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 21:45:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 21:45:00,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:00,685 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:45:00,686 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-03-17 21:45:00,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:00,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106483519] [2022-03-17 21:45:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:00,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:00,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:45:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:00,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:45:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 21:45:00,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106483519] [2022-03-17 21:45:00,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106483519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:45:00,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:45:00,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 21:45:00,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348089935] [2022-03-17 21:45:00,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:45:00,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 21:45:00,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 21:45:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:45:00,908 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 21:45:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:00,998 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-17 21:45:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 21:45:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 21:45:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:01,005 INFO L225 Difference]: With dead ends: 66 [2022-03-17 21:45:01,005 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 21:45:01,008 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:45:01,013 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:01,013 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:45:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 21:45:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-17 21:45:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 21:45:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-17 21:45:01,048 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-17 21:45:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:01,049 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-17 21:45:01,049 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 21:45:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-17 21:45:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 21:45:01,050 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:01,051 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:45:01,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 21:45:01,051 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-03-17 21:45:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:01,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274710526] [2022-03-17 21:45:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:01,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:01,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:45:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:01,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:45:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 21:45:01,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:01,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274710526] [2022-03-17 21:45:01,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274710526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:45:01,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:45:01,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 21:45:01,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504671311] [2022-03-17 21:45:01,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:45:01,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:45:01,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:01,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:45:01,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:45:01,166 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 21:45:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:01,291 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-17 21:45:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 21:45:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-17 21:45:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:01,293 INFO L225 Difference]: With dead ends: 47 [2022-03-17 21:45:01,293 INFO L226 Difference]: Without dead ends: 45 [2022-03-17 21:45:01,293 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:45:01,294 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:01,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:45:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-17 21:45:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-17 21:45:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 21:45:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-17 21:45:01,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-17 21:45:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:01,302 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-17 21:45:01,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 21:45:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-17 21:45:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 21:45:01,303 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:01,303 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:45:01,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 21:45:01,303 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:01,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-03-17 21:45:01,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:01,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144030356] [2022-03-17 21:45:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:01,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:01,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:45:01,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309015143] [2022-03-17 21:45:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:01,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:01,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:01,338 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 21:45:01,340 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 21:45:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 21:45:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:45:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 21:45:01,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:45:01,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:01,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144030356] [2022-03-17 21:45:01,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:45:01,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309015143] [2022-03-17 21:45:01,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309015143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:45:01,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:45:01,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 21:45:01,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356579319] [2022-03-17 21:45:01,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:45:01,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 21:45:01,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:01,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 21:45:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 21:45:01,458 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 21:45:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:01,469 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-17 21:45:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 21:45:01,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-17 21:45:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:01,470 INFO L225 Difference]: With dead ends: 52 [2022-03-17 21:45:01,471 INFO L226 Difference]: Without dead ends: 38 [2022-03-17 21:45:01,471 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 21:45:01,472 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:01,472 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:45:01,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-17 21:45:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-17 21:45:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 21:45:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-17 21:45:01,478 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-17 21:45:01,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:01,478 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-17 21:45:01,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 21:45:01,478 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-17 21:45:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 21:45:01,479 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:01,479 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:45:01,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 21:45:01,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:01,692 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:01,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-03-17 21:45:01,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:01,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977207816] [2022-03-17 21:45:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:01,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:45:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:01,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:45:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:01,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-17 21:45:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 21:45:01,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:01,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977207816] [2022-03-17 21:45:01,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977207816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:45:01,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:45:01,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 21:45:01,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510277300] [2022-03-17 21:45:01,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:45:01,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:45:01,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:01,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:45:01,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:45:01,795 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:45:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:01,941 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-17 21:45:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 21:45:01,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 21:45:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:01,944 INFO L225 Difference]: With dead ends: 52 [2022-03-17 21:45:01,944 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 21:45:01,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:45:01,951 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:01,952 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:45:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 21:45:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-17 21:45:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 21:45:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-17 21:45:01,959 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-17 21:45:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:01,959 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-17 21:45:01,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:45:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-17 21:45:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 21:45:01,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:01,960 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:45:01,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 21:45:01,960 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-03-17 21:45:01,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:01,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471650962] [2022-03-17 21:45:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:01,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:01,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:45:01,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361628835] [2022-03-17 21:45:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:01,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:01,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:01,985 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 21:45:01,987 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 21:45:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:45:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:45:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:45:02,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:45:02,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471650962] [2022-03-17 21:45:02,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:45:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361628835] [2022-03-17 21:45:02,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361628835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:45:02,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:45:02,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:45:02,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296066371] [2022-03-17 21:45:02,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:45:02,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:45:02,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:45:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:45:02,122 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 21:45:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:02,169 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-03-17 21:45:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:45:02,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 21:45:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:02,170 INFO L225 Difference]: With dead ends: 71 [2022-03-17 21:45:02,171 INFO L226 Difference]: Without dead ends: 56 [2022-03-17 21:45:02,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:45:02,171 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:02,172 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:45:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-17 21:45:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-17 21:45:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 21:45:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-03-17 21:45:02,183 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-03-17 21:45:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:02,183 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-03-17 21:45:02,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 21:45:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-03-17 21:45:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 21:45:02,184 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:02,184 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:45:02,203 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 21:45:02,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:02,388 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:02,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-03-17 21:45:02,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:02,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714084948] [2022-03-17 21:45:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:02,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:02,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:45:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500606060] [2022-03-17 21:45:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:02,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:02,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:02,401 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 21:45:02,402 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 21:45:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:02,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:45:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:45:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:45:02,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:45:02,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714084948] [2022-03-17 21:45:02,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:45:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500606060] [2022-03-17 21:45:02,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500606060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:45:02,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:45:02,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:45:02,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947323130] [2022-03-17 21:45:02,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:45:02,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:45:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:45:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:45:02,504 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 21:45:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:02,526 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-03-17 21:45:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:45:02,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-17 21:45:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:02,528 INFO L225 Difference]: With dead ends: 76 [2022-03-17 21:45:02,528 INFO L226 Difference]: Without dead ends: 69 [2022-03-17 21:45:02,528 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:45:02,528 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:02,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:45:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-17 21:45:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-17 21:45:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 21:45:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-03-17 21:45:02,536 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-03-17 21:45:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:02,536 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-03-17 21:45:02,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 21:45:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-03-17 21:45:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 21:45:02,537 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:02,537 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:45:02,556 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 21:45:02,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:02,752 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-03-17 21:45:02,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:02,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358842031] [2022-03-17 21:45:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:02,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:02,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:45:02,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785329570] [2022-03-17 21:45:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:02,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:02,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:02,761 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 21:45:02,762 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 21:45:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:02,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:45:02,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:45:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:45:02,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:45:02,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:02,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358842031] [2022-03-17 21:45:02,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:45:02,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785329570] [2022-03-17 21:45:02,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785329570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:45:02,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:45:02,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 21:45:02,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375086717] [2022-03-17 21:45:02,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:45:02,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:45:02,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:02,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:45:02,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:45:02,965 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:45:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:03,041 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-03-17 21:45:03,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:45:03,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-17 21:45:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:03,042 INFO L225 Difference]: With dead ends: 74 [2022-03-17 21:45:03,042 INFO L226 Difference]: Without dead ends: 58 [2022-03-17 21:45:03,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:45:03,043 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:03,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 184 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:45:03,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-17 21:45:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-17 21:45:03,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 21:45:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-17 21:45:03,049 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2022-03-17 21:45:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:03,050 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-17 21:45:03,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:45:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-17 21:45:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 21:45:03,050 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:03,050 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:45:03,072 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 21:45:03,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:03,256 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-03-17 21:45:03,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:03,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967083996] [2022-03-17 21:45:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:03,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:03,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:45:03,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169505647] [2022-03-17 21:45:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:03,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:03,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:03,307 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 21:45:03,312 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 21:45:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:03,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:45:03,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:45:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:45:03,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:45:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:45:03,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:03,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967083996] [2022-03-17 21:45:03,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:45:03,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169505647] [2022-03-17 21:45:03,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169505647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:45:03,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:45:03,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 21:45:03,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796684953] [2022-03-17 21:45:03,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:45:03,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 21:45:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 21:45:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:45:03,542 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 21:45:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:03,631 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2022-03-17 21:45:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 21:45:03,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-03-17 21:45:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:03,634 INFO L225 Difference]: With dead ends: 123 [2022-03-17 21:45:03,634 INFO L226 Difference]: Without dead ends: 109 [2022-03-17 21:45:03,635 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:45:03,636 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 54 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:03,636 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 217 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:45:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-17 21:45:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-03-17 21:45:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 21:45:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-03-17 21:45:03,658 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 38 [2022-03-17 21:45:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:03,658 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-03-17 21:45:03,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-17 21:45:03,658 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-03-17 21:45:03,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-17 21:45:03,659 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:03,659 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:45:03,681 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 21:45:03,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:03,868 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-03-17 21:45:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:03,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568793636] [2022-03-17 21:45:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:03,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:03,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:45:03,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130006640] [2022-03-17 21:45:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:03,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:03,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:03,878 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 21:45:03,879 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 21:45:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:03,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-17 21:45:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:45:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 21:45:04,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:45:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 21:45:04,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:04,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568793636] [2022-03-17 21:45:04,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:45:04,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130006640] [2022-03-17 21:45:04,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130006640] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:45:04,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:45:04,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 21:45:04,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767378404] [2022-03-17 21:45:04,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:45:04,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:45:04,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:04,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:45:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:45:04,250 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:45:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:04,297 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2022-03-17 21:45:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:45:04,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-03-17 21:45:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:04,298 INFO L225 Difference]: With dead ends: 120 [2022-03-17 21:45:04,298 INFO L226 Difference]: Without dead ends: 118 [2022-03-17 21:45:04,299 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:45:04,299 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:04,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:45:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-17 21:45:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-03-17 21:45:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 76 states have internal predecessors, (85), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-17 21:45:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-03-17 21:45:04,308 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 46 [2022-03-17 21:45:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:04,308 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-03-17 21:45:04,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:45:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-03-17 21:45:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 21:45:04,309 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:04,309 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-03-17 21:45:04,329 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 21:45:04,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:04,521 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2022-03-17 21:45:04,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:04,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057107679] [2022-03-17 21:45:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:04,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:04,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:45:04,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871043261] [2022-03-17 21:45:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:04,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:04,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:04,530 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 21:45:04,531 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 21:45:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:04,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:45:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:45:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:45:04,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:45:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 21:45:04,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057107679] [2022-03-17 21:45:04,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:45:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871043261] [2022-03-17 21:45:04,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871043261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:45:04,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:45:04,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 21:45:04,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123339488] [2022-03-17 21:45:04,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:45:04,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 21:45:04,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 21:45:04,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:45:04,744 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-17 21:45:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:04,880 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2022-03-17 21:45:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 21:45:04,880 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 54 [2022-03-17 21:45:04,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:04,882 INFO L225 Difference]: With dead ends: 207 [2022-03-17 21:45:04,882 INFO L226 Difference]: Without dead ends: 193 [2022-03-17 21:45:04,883 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-03-17 21:45:04,883 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:04,883 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 224 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:45:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-17 21:45:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-03-17 21:45:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 125 states have internal predecessors, (139), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-17 21:45:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2022-03-17 21:45:04,895 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 54 [2022-03-17 21:45:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:04,895 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2022-03-17 21:45:04,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-17 21:45:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2022-03-17 21:45:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 21:45:04,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:04,896 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-03-17 21:45:04,914 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 21:45:05,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:05,114 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2022-03-17 21:45:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:05,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229485624] [2022-03-17 21:45:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:05,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:45:05,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135664806] [2022-03-17 21:45:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:05,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:05,122 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 21:45:05,123 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 21:45:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:05,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 21:45:05,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:45:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 21:45:05,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:45:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 21:45:05,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:45:05,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229485624] [2022-03-17 21:45:05,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:45:05,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135664806] [2022-03-17 21:45:05,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135664806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:45:05,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:45:05,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-17 21:45:05,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67489743] [2022-03-17 21:45:05,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:45:05,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 21:45:05,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:45:05,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 21:45:05,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:45:05,688 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 21:45:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:45:05,892 INFO L93 Difference]: Finished difference Result 268 states and 340 transitions. [2022-03-17 21:45:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 21:45:05,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 54 [2022-03-17 21:45:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:45:05,895 INFO L225 Difference]: With dead ends: 268 [2022-03-17 21:45:05,895 INFO L226 Difference]: Without dead ends: 264 [2022-03-17 21:45:05,896 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-17 21:45:05,896 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 58 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:45:05,896 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 294 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:45:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-17 21:45:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2022-03-17 21:45:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 163 states have internal predecessors, (189), 56 states have call successors, (56), 29 states have call predecessors, (56), 27 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-17 21:45:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-03-17 21:45:05,918 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 54 [2022-03-17 21:45:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:45:05,918 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-03-17 21:45:05,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 21:45:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-03-17 21:45:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-17 21:45:05,924 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:45:05,924 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-03-17 21:45:05,943 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 21:45:06,141 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,SelfDestructingSolverStorable10 [2022-03-17 21:45:06,142 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:45:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:45:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2022-03-17 21:45:06,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:45:06,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271801444] [2022-03-17 21:45:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:06,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:45:06,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:45:06,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380659727] [2022-03-17 21:45:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:45:06,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:45:06,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:45:06,150 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 21:45:06,151 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 21:45:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:45:06,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 21:45:06,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:45:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 21:45:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:45:39,195 WARN L232 SmtUtils]: Spent 21.69s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:46:41,570 WARN L232 SmtUtils]: Spent 17.69s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:47:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 21:47:52,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:47:52,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271801444] [2022-03-17 21:47:52,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:47:52,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380659727] [2022-03-17 21:47:52,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380659727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:47:52,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:47:52,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-03-17 21:47:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617529391] [2022-03-17 21:47:52,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:47:52,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 21:47:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:47:52,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 21:47:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-17 21:47:52,820 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-17 21:47:54,885 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 21:48:05,325 WARN L232 SmtUtils]: Spent 9.02s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:48:09,814 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (<= c_main_~d~0 c_main_~r~0)) (.cse0 (mod c_main_~A~0 4294967296)) (.cse2 (mod c_main_~B~0 4294967296))) (and (let ((.cse1 (* 2 c_main_~p~0)) (.cse3 (* 2 c_main_~d~0))) (or (= .cse0 (+ (* (+ c_main_~q~0 (div .cse1 2)) .cse2) (* (- 1) (div .cse3 2)) c_main_~r~0)) (not (= (* .cse1 .cse2) .cse3)) (not .cse4) (<= .cse3 c_main_~r~0))) (or .cse4 (not (= c_main_~d~0 (* c_main_~p~0 .cse2))) (let ((.cse7 (= (mod c_main_~p~0 2) 0)) (.cse13 (div c_main_~p~0 2))) (let ((.cse9 (* (+ c_main_~q~0 .cse13) .cse2)) (.cse10 (not .cse7)) (.cse5 (* (- 1) (div c_main_~d~0 2))) (.cse6 (* (+ c_main_~q~0 .cse13 1) .cse2)) (.cse12 (= (mod c_main_~d~0 2) 0)) (.cse11 (< c_main_~d~0 0))) (and (or (let ((.cse8 (< c_main_~p~0 0))) (and (or (= .cse0 (+ c_main_~r~0 .cse5 .cse6)) .cse7 (not .cse8)) (or (= .cse0 (+ .cse9 c_main_~r~0 .cse5)) (and .cse10 .cse8)))) (and .cse11 (not .cse12))) (or (and (or (= .cse0 (+ (- 1) .cse9 c_main_~r~0 .cse5)) .cse10) (or .cse7 (= .cse0 (+ (- 1) c_main_~r~0 .cse5 .cse6)))) .cse12 (not .cse11)))))))) is different from true [2022-03-17 21:48:15,803 WARN L534 Checker$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 21:48:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:48:16,122 INFO L93 Difference]: Finished difference Result 362 states and 459 transitions. [2022-03-17 21:48:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 21:48:16,122 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 68 [2022-03-17 21:48:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:48:16,125 INFO L225 Difference]: With dead ends: 362 [2022-03-17 21:48:16,125 INFO L226 Difference]: Without dead ends: 286 [2022-03-17 21:48:16,127 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=129, Invalid=524, Unknown=1, NotChecked=48, Total=702 [2022-03-17 21:48:16,129 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 113 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:48:16,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 345 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 400 Invalid, 2 Unknown, 6 Unchecked, 11.0s Time] [2022-03-17 21:48:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-03-17 21:48:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 252. [2022-03-17 21:48:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 176 states have internal predecessors, (200), 53 states have call successors, (53), 31 states have call predecessors, (53), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-17 21:48:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2022-03-17 21:48:16,149 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 68 [2022-03-17 21:48:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:48:16,150 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2022-03-17 21:48:16,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-17 21:48:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2022-03-17 21:48:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-17 21:48:16,150 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:48:16,151 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 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] [2022-03-17 21:48:16,167 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 21:48:16,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:48:16,351 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:48:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:48:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2022-03-17 21:48:16,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:48:16,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866538047] [2022-03-17 21:48:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:48:16,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:48:16,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:48:16,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886654537] [2022-03-17 21:48:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:48:16,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:48:16,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:48:16,364 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 21:48:16,366 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 21:48:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:48:16,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-17 21:48:16,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:48:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-17 21:48:16,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:48:19,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:48:19,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866538047] [2022-03-17 21:48:19,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:48:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886654537] [2022-03-17 21:48:19,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886654537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:48:19,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:48:19,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-17 21:48:19,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893826789] [2022-03-17 21:48:19,534 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:48:19,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 21:48:19,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:48:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 21:48:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-17 21:48:19,535 INFO L87 Difference]: Start difference. First operand 252 states and 302 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-17 21:48:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:48:20,318 INFO L93 Difference]: Finished difference Result 350 states and 433 transitions. [2022-03-17 21:48:20,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 21:48:20,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2022-03-17 21:48:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:48:20,320 INFO L225 Difference]: With dead ends: 350 [2022-03-17 21:48:20,320 INFO L226 Difference]: Without dead ends: 287 [2022-03-17 21:48:20,320 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-17 21:48:20,321 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 32 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 21:48:20,321 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 454 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 21:48:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-17 21:48:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2022-03-17 21:48:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 178 states have (on average 1.1797752808988764) internal successors, (210), 186 states have internal predecessors, (210), 57 states have call successors, (57), 34 states have call predecessors, (57), 32 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-17 21:48:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 320 transitions. [2022-03-17 21:48:20,345 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 320 transitions. Word has length 79 [2022-03-17 21:48:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:48:20,345 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 320 transitions. [2022-03-17 21:48:20,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-17 21:48:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 320 transitions. [2022-03-17 21:48:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-17 21:48:20,346 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:48:20,346 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 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] [2022-03-17 21:48:20,363 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 21:48:20,546 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,SelfDestructingSolverStorable12 [2022-03-17 21:48:20,547 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:48:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:48:20,547 INFO L85 PathProgramCache]: Analyzing trace with hash -911798983, now seen corresponding path program 2 times [2022-03-17 21:48:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:48:20,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533750504] [2022-03-17 21:48:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:48:20,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:48:20,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:48:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881431594] [2022-03-17 21:48:20,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:48:20,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:48:20,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:48:20,554 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 21:48:20,555 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 21:48:20,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:48:20,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:48:20,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:48:20,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:48:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-17 21:48:20,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:48:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-17 21:48:20,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:48:20,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533750504] [2022-03-17 21:48:20,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:48:20,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881431594] [2022-03-17 21:48:20,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881431594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:48:20,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:48:20,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-17 21:48:20,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91673652] [2022-03-17 21:48:20,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:48:20,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:48:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:48:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:48:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:48:20,833 INFO L87 Difference]: Start difference. First operand 268 states and 320 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-17 21:48:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:48:20,920 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2022-03-17 21:48:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 21:48:20,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2022-03-17 21:48:20,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:48:20,933 INFO L225 Difference]: With dead ends: 306 [2022-03-17 21:48:20,933 INFO L226 Difference]: Without dead ends: 259 [2022-03-17 21:48:20,933 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:48:20,933 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:48:20,933 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 182 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:48:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-17 21:48:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2022-03-17 21:48:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 166 states have (on average 1.1686746987951808) internal successors, (194), 171 states have internal predecessors, (194), 51 states have call successors, (51), 32 states have call predecessors, (51), 30 states have return successors, (48), 44 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-17 21:48:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 293 transitions. [2022-03-17 21:48:20,946 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 293 transitions. Word has length 82 [2022-03-17 21:48:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:48:20,947 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 293 transitions. [2022-03-17 21:48:20,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-03-17 21:48:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 293 transitions. [2022-03-17 21:48:20,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-17 21:48:20,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:48:20,947 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 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] [2022-03-17 21:48:20,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 21:48:21,163 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,SelfDestructingSolverStorable13 [2022-03-17 21:48:21,164 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:48:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:48:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1053492757, now seen corresponding path program 1 times [2022-03-17 21:48:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:48:21,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439567519] [2022-03-17 21:48:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:48:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:48:21,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:48:21,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639551041] [2022-03-17 21:48:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:48:21,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:48:21,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:48:21,171 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 21:48:21,172 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 21:48:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:48:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 21:48:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:48:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 21:48:21,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:48:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 21:48:21,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:48:21,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439567519] [2022-03-17 21:48:21,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:48:21,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639551041] [2022-03-17 21:48:21,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639551041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:48:21,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:48:21,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-17 21:48:21,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355574036] [2022-03-17 21:48:21,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:48:21,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 21:48:21,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:48:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 21:48:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:48:21,734 INFO L87 Difference]: Start difference. First operand 248 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-17 21:48:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:48:21,963 INFO L93 Difference]: Finished difference Result 254 states and 299 transitions. [2022-03-17 21:48:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 21:48:21,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 84 [2022-03-17 21:48:21,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:48:21,965 INFO L225 Difference]: With dead ends: 254 [2022-03-17 21:48:21,965 INFO L226 Difference]: Without dead ends: 229 [2022-03-17 21:48:21,965 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:48:21,965 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:48:21,965 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 425 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 21:48:21,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-17 21:48:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-03-17 21:48:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 158 states have internal predecessors, (180), 47 states have call successors, (47), 30 states have call predecessors, (47), 28 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-17 21:48:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2022-03-17 21:48:21,981 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 84 [2022-03-17 21:48:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:48:21,983 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2022-03-17 21:48:21,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-17 21:48:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2022-03-17 21:48:21,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-17 21:48:21,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:48:21,986 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:48:22,006 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 21:48:22,199 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,SelfDestructingSolverStorable14 [2022-03-17 21:48:22,199 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:48:22,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:48:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash -883405496, now seen corresponding path program 1 times [2022-03-17 21:48:22,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:48:22,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39412100] [2022-03-17 21:48:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:48:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:48:22,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:48:22,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980543597] [2022-03-17 21:48:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:48:22,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:48:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:48:22,215 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 21:48:22,216 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 21:48:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:48:22,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 21:48:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:48:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-17 21:48:22,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:48:22,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:48:22,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39412100] [2022-03-17 21:48:22,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:48:22,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980543597] [2022-03-17 21:48:22,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980543597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:48:22,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:48:22,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:48:22,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513295828] [2022-03-17 21:48:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:48:22,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:48:22,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:48:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:48:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:48:22,399 INFO L87 Difference]: Start difference. First operand 229 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 21:48:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:48:22,477 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2022-03-17 21:48:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:48:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 88 [2022-03-17 21:48:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:48:22,479 INFO L225 Difference]: With dead ends: 249 [2022-03-17 21:48:22,479 INFO L226 Difference]: Without dead ends: 228 [2022-03-17 21:48:22,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:48:22,479 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 25 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:48:22,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 107 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:48:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-17 21:48:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2022-03-17 21:48:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 150 states have internal predecessors, (167), 43 states have call successors, (43), 28 states have call predecessors, (43), 27 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-17 21:48:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2022-03-17 21:48:22,491 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 88 [2022-03-17 21:48:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:48:22,493 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2022-03-17 21:48:22,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 21:48:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2022-03-17 21:48:22,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-17 21:48:22,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:48:22,494 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:48:22,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 21:48:22,707 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,SelfDestructingSolverStorable15 [2022-03-17 21:48:22,707 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:48:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:48:22,708 INFO L85 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2022-03-17 21:48:22,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:48:22,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495202421] [2022-03-17 21:48:22,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:48:22,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:48:22,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:48:22,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755587673] [2022-03-17 21:48:22,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:48:22,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:48:22,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:48:22,715 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 21:48:22,716 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 21:48:22,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 21:48:22,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:48:22,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-17 21:48:22,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:48:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 31 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-17 21:48:23,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:48:55,374 WARN L232 SmtUtils]: Spent 12.75s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:49:55,852 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~B~0 4294967296))) (or (not (= c_main_~d~0 (* c_main_~p~0 .cse0))) (let ((.cse5 (= (mod c_main_~p~0 2) 0)) (.cse11 (div c_main_~p~0 2))) (let ((.cse9 (< c_main_~d~0 0)) (.cse8 (= (mod c_main_~d~0 2) 0)) (.cse4 (* (+ c_main_~q~0 c_main_~p~0 .cse11 1) .cse0)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse6 (* .cse0 (+ c_main_~q~0 c_main_~p~0 .cse11))) (.cse2 (* (- 1) c_main_~d~0)) (.cse3 (* (- 1) (div c_main_~d~0 2))) (.cse7 (not .cse5))) (and (or (and (or (= .cse1 (+ (- 1) .cse2 c_main_~r~0 .cse3 .cse4)) .cse5) (or (= .cse1 (+ (- 1) .cse6 .cse2 c_main_~r~0 .cse3)) .cse7)) .cse8 (not .cse9)) (or (and .cse9 (not .cse8)) (let ((.cse10 (< c_main_~p~0 0))) (and (or (= .cse1 (+ .cse2 c_main_~r~0 .cse3 .cse4)) .cse5 (not .cse10)) (or (= .cse1 (+ .cse6 .cse2 c_main_~r~0 .cse3)) (and .cse7 .cse10)))))))))) is different from true [2022-03-17 21:51:17,906 WARN L232 SmtUtils]: Spent 46.20s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:59:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 30 refuted. 0 times theorem prover too weak. 276 trivial. 1 not checked. [2022-03-17 21:59:09,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:59:09,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495202421] [2022-03-17 21:59:09,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:59:09,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755587673] [2022-03-17 21:59:09,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755587673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:59:09,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:59:09,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-03-17 21:59:09,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184003737] [2022-03-17 21:59:09,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:59:09,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 21:59:09,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:59:09,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 21:59:09,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=377, Unknown=7, NotChecked=40, Total=506 [2022-03-17 21:59:09,868 INFO L87 Difference]: Start difference. First operand 218 states and 251 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 20 states have internal predecessors, (60), 10 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 10 states have call predecessors, (29), 8 states have call successors, (29) [2022-03-17 21:59:12,350 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 21:59:16,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:59:18,492 WARN L534 Checker$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 21:59:25,658 WARN L232 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 146 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:59:29,068 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 21:59:39,177 WARN L232 SmtUtils]: Spent 8.63s on a formula simplification. DAG size of input: 83 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)