/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_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 12:05:35,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 12:05:35,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 12:05:35,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 12:05:35,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 12:05:35,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 12:05:35,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 12:05:35,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 12:05:35,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 12:05:35,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 12:05:35,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 12:05:35,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 12:05:35,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 12:05:35,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 12:05:35,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 12:05:35,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 12:05:35,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 12:05:35,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 12:05:35,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 12:05:35,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 12:05:35,333 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 12:05:35,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 12:05:35,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 12:05:35,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 12:05:35,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 12:05:35,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 12:05:35,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 12:05:35,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 12:05:35,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 12:05:35,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 12:05:35,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 12:05:35,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 12:05:35,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 12:05:35,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 12:05:35,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 12:05:35,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 12:05:35,378 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 12:05:35,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 12:05:35,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 12:05:35,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 12:05:35,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 12:05:35,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 12:05:35,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 12:05:35,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 12:05:35,380 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 12:05:35,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 12:05:35,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 12:05:35,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 12:05:35,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 12:05:35,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 12:05:35,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 12:05:35,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 12:05:35,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 12:05:35,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 12:05:35,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 12:05:35,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 12:05:35,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 12:05:35,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 12:05:35,384 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 12:05:35,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 12:05:35,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 12:05:35,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 12:05:35,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 12:05:35,633 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 12:05:35,634 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 12:05:35,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2022-04-06 12:05:35,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8bb74dd/5c118e60eefe417dade023d7d334ba94/FLAGebf826bd4 [2022-04-06 12:05:36,187 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 12:05:36,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2022-04-06 12:05:36,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8bb74dd/5c118e60eefe417dade023d7d334ba94/FLAGebf826bd4 [2022-04-06 12:05:36,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8bb74dd/5c118e60eefe417dade023d7d334ba94 [2022-04-06 12:05:36,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 12:05:36,599 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 12:05:36,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 12:05:36,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 12:05:36,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 12:05:36,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 12:05:36" (1/1) ... [2022-04-06 12:05:36,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333e63e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:36, skipping insertion in model container [2022-04-06 12:05:36,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 12:05:36" (1/1) ... [2022-04-06 12:05:36,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 12:05:36,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 12:05:36,976 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_unwindbound100.c[538,551] [2022-04-06 12:05:37,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 12:05:37,028 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 12:05:37,045 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_unwindbound100.c[538,551] [2022-04-06 12:05:37,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 12:05:37,091 INFO L208 MainTranslator]: Completed translation [2022-04-06 12:05:37,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37 WrapperNode [2022-04-06 12:05:37,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 12:05:37,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 12:05:37,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 12:05:37,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 12:05:37,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37" (1/1) ... [2022-04-06 12:05:37,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37" (1/1) ... [2022-04-06 12:05:37,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37" (1/1) ... [2022-04-06 12:05:37,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37" (1/1) ... [2022-04-06 12:05:37,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37" (1/1) ... [2022-04-06 12:05:37,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37" (1/1) ... [2022-04-06 12:05:37,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37" (1/1) ... [2022-04-06 12:05:37,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 12:05:37,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 12:05:37,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 12:05:37,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 12:05:37,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37" (1/1) ... [2022-04-06 12:05:37,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 12:05:37,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:37,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 12:05:37,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 12:05:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 12:05:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 12:05:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 12:05:37,303 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 12:05:37,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 12:05:37,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 12:05:37,304 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 12:05:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 12:05:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 12:05:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 12:05:37,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 12:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 12:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 12:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 12:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 12:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 12:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 12:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 12:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 12:05:37,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 12:05:37,402 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 12:05:37,404 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 12:05:37,658 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 12:05:37,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 12:05:37,663 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 12:05:37,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 12:05:37 BoogieIcfgContainer [2022-04-06 12:05:37,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 12:05:37,665 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 12:05:37,665 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 12:05:37,669 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 12:05:37,677 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 12:05:37" (1/1) ... [2022-04-06 12:05:37,692 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 12:05:37,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 12:05:37 BasicIcfg [2022-04-06 12:05:37,706 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 12:05:37,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 12:05:37,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 12:05:37,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 12:05:37,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 12:05:36" (1/4) ... [2022-04-06 12:05:37,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f70f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 12:05:37, skipping insertion in model container [2022-04-06 12:05:37,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:05:37" (2/4) ... [2022-04-06 12:05:37,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f70f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 12:05:37, skipping insertion in model container [2022-04-06 12:05:37,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 12:05:37" (3/4) ... [2022-04-06 12:05:37,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f70f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 12:05:37, skipping insertion in model container [2022-04-06 12:05:37,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 12:05:37" (4/4) ... [2022-04-06 12:05:37,729 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound100.cqvasr [2022-04-06 12:05:37,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 12:05:37,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 12:05:37,797 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 12:05:37,805 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 [2022-04-06 12:05:37,805 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 12:05:37,822 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) [2022-04-06 12:05:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 12:05:37,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:37,827 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:05:37,828 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-04-06 12:05:37,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:37,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830506713] [2022-04-06 12:05:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:37,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:38,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 12:05:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:38,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 12:05:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 12:05:38,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:38,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830506713] [2022-04-06 12:05:38,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830506713] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:05:38,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:05:38,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 12:05:38,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067717511] [2022-04-06 12:05:38,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:05:38,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 12:05:38,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:38,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 12:05:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 12:05:38,094 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) [2022-04-06 12:05:38,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:38,194 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-04-06 12:05:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 12:05:38,197 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 [2022-04-06 12:05:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:38,203 INFO L225 Difference]: With dead ends: 66 [2022-04-06 12:05:38,203 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 12:05:38,206 INFO L912 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 [2022-04-06 12:05:38,209 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-04-06 12:05:38,210 INFO L914 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] [2022-04-06 12:05:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 12:05:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-06 12:05:38,241 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) [2022-04-06 12:05:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 12:05:38,246 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-04-06 12:05:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:38,246 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 12:05:38,247 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) [2022-04-06 12:05:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 12:05:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 12:05:38,248 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:38,249 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:05:38,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 12:05:38,250 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:38,252 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-04-06 12:05:38,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:38,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122849102] [2022-04-06 12:05:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:38,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:38,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 12:05:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:38,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 12:05:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 12:05:38,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:38,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122849102] [2022-04-06 12:05:38,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122849102] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:05:38,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:05:38,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 12:05:38,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539072136] [2022-04-06 12:05:38,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:05:38,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 12:05:38,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 12:05:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 12:05:38,366 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) [2022-04-06 12:05:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:38,585 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-06 12:05:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 12:05:38,586 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 [2022-04-06 12:05:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:38,593 INFO L225 Difference]: With dead ends: 47 [2022-04-06 12:05:38,594 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 12:05:38,602 INFO L912 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 [2022-04-06 12:05:38,603 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:05:38,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:05:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 12:05:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-04-06 12:05:38,618 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) [2022-04-06 12:05:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-06 12:05:38,620 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-04-06 12:05:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:38,620 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-06 12:05:38,620 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) [2022-04-06 12:05:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-06 12:05:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 12:05:38,621 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:38,621 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:05:38,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 12:05:38,622 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:38,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-04-06 12:05:38,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:38,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924781725] [2022-04-06 12:05:38,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:38,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:38,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:05:38,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036527915] [2022-04-06 12:05:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:38,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:38,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:38,641 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:05:38,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 12:05:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 12:05:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:05:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 12:05:38,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 12:05:38,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:38,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924781725] [2022-04-06 12:05:38,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:05:38,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036527915] [2022-04-06 12:05:38,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036527915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:05:38,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:05:38,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 12:05:38,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708165119] [2022-04-06 12:05:38,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:05:38,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 12:05:38,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 12:05:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 12:05:38,798 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) [2022-04-06 12:05:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:38,810 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-04-06 12:05:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 12:05:38,812 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 [2022-04-06 12:05:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:38,814 INFO L225 Difference]: With dead ends: 52 [2022-04-06 12:05:38,814 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 12:05:38,814 INFO L912 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 [2022-04-06 12:05:38,815 INFO L913 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 [2022-04-06 12:05:38,816 INFO L914 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] [2022-04-06 12:05:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 12:05:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 12:05:38,824 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) [2022-04-06 12:05:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-04-06 12:05:38,825 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-04-06 12:05:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:38,825 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-04-06 12:05:38,826 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) [2022-04-06 12:05:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-04-06 12:05:38,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 12:05:38,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:38,827 INFO L499 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] [2022-04-06 12:05:38,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 12:05:39,043 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 [2022-04-06 12:05:39,044 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:39,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-04-06 12:05:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:39,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78895903] [2022-04-06 12:05:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:39,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:39,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 12:05:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 12:05:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:39,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 12:05:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 12:05:39,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:39,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78895903] [2022-04-06 12:05:39,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78895903] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:05:39,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:05:39,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 12:05:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855228469] [2022-04-06 12:05:39,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:05:39,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 12:05:39,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:39,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 12:05:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 12:05:39,125 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) [2022-04-06 12:05:39,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:39,293 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-06 12:05:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 12:05:39,294 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 [2022-04-06 12:05:39,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:39,295 INFO L225 Difference]: With dead ends: 52 [2022-04-06 12:05:39,295 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 12:05:39,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 12:05:39,296 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:05:39,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:05:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 12:05:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-04-06 12:05:39,323 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) [2022-04-06 12:05:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 12:05:39,327 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-04-06 12:05:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:39,327 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 12:05:39,327 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) [2022-04-06 12:05:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 12:05:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 12:05:39,328 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:39,328 INFO L499 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] [2022-04-06 12:05:39,329 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 12:05:39,329 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-04-06 12:05:39,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:39,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36974241] [2022-04-06 12:05:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:39,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:39,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:05:39,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874283289] [2022-04-06 12:05:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:39,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:39,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:39,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:05:39,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 12:05:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:39,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 12:05:39,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:05:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 12:05:39,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 12:05:39,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:39,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36974241] [2022-04-06 12:05:39,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:05:39,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874283289] [2022-04-06 12:05:39,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874283289] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:05:39,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:05:39,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 12:05:39,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821884779] [2022-04-06 12:05:39,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:05:39,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:05:39,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:05:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:05:39,539 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) [2022-04-06 12:05:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:39,593 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-04-06 12:05:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:05:39,594 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 [2022-04-06 12:05:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:39,595 INFO L225 Difference]: With dead ends: 71 [2022-04-06 12:05:39,595 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 12:05:39,596 INFO L912 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 [2022-04-06 12:05:39,596 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:05:39,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:05:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 12:05:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 12:05:39,604 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) [2022-04-06 12:05:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-04-06 12:05:39,605 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-04-06 12:05:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:39,605 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-04-06 12:05:39,605 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) [2022-04-06 12:05:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-04-06 12:05:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 12:05:39,606 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:39,606 INFO L499 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] [2022-04-06 12:05:39,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 12:05:39,830 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:39,830 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-04-06 12:05:39,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:39,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443164655] [2022-04-06 12:05:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:39,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:39,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:05:39,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141636691] [2022-04-06 12:05:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:39,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:39,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:05:39,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 12:05:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:39,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 12:05:39,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:05:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 12:05:39,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 12:05:39,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:40,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443164655] [2022-04-06 12:05:40,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:05:40,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141636691] [2022-04-06 12:05:40,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141636691] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:05:40,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:05:40,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 12:05:40,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012743949] [2022-04-06 12:05:40,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:05:40,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:05:40,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:05:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:05:40,008 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) [2022-04-06 12:05:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:40,049 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-04-06 12:05:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:05:40,050 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 [2022-04-06 12:05:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:40,053 INFO L225 Difference]: With dead ends: 76 [2022-04-06 12:05:40,053 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 12:05:40,053 INFO L912 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 [2022-04-06 12:05:40,055 INFO L913 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 [2022-04-06 12:05:40,056 INFO L914 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] [2022-04-06 12:05:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 12:05:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 12:05:40,066 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) [2022-04-06 12:05:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-04-06 12:05:40,066 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-04-06 12:05:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:40,066 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-04-06 12:05:40,067 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) [2022-04-06 12:05:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-04-06 12:05:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 12:05:40,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:40,068 INFO L499 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] [2022-04-06 12:05:40,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 12:05:40,286 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:40,287 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-04-06 12:05:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:40,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827588904] [2022-04-06 12:05:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:40,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:40,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:05:40,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629259331] [2022-04-06 12:05:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:40,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:40,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:40,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:05:40,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 12:05:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:40,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 12:05:40,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:05:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 12:05:40,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 12:05:40,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:40,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827588904] [2022-04-06 12:05:40,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:05:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629259331] [2022-04-06 12:05:40,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629259331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:05:40,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:05:40,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 12:05:40,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484980743] [2022-04-06 12:05:40,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:05:40,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 12:05:40,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:40,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 12:05:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 12:05:40,556 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) [2022-04-06 12:05:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:40,650 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-04-06 12:05:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 12:05:40,651 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 [2022-04-06 12:05:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:40,653 INFO L225 Difference]: With dead ends: 74 [2022-04-06 12:05:40,653 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 12:05:40,653 INFO L912 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 [2022-04-06 12:05:40,654 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:05:40,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:05:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 12:05:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 12:05:40,670 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) [2022-04-06 12:05:40,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-04-06 12:05:40,672 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2022-04-06 12:05:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:40,672 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-04-06 12:05:40,672 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) [2022-04-06 12:05:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-04-06 12:05:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 12:05:40,679 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:40,679 INFO L499 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] [2022-04-06 12:05:40,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 12:05:40,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:40,895 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:40,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-04-06 12:05:40,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:40,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066350732] [2022-04-06 12:05:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:40,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:40,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:05:40,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355711861] [2022-04-06 12:05:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:40,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:40,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:05:40,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 12:05:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:40,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 12:05:40,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:05:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 12:05:41,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:05:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 12:05:41,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066350732] [2022-04-06 12:05:41,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:05:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355711861] [2022-04-06 12:05:41,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355711861] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:05:41,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:05:41,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 12:05:41,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350512997] [2022-04-06 12:05:41,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:05:41,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 12:05:41,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:41,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 12:05:41,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 12:05:41,148 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) [2022-04-06 12:05:41,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:41,243 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2022-04-06 12:05:41,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 12:05:41,244 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 [2022-04-06 12:05:41,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:41,245 INFO L225 Difference]: With dead ends: 123 [2022-04-06 12:05:41,245 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 12:05:41,245 INFO L912 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 [2022-04-06 12:05:41,246 INFO L913 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, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:05:41,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 217 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:05:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 12:05:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-04-06 12:05:41,256 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) [2022-04-06 12:05:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-04-06 12:05:41,257 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 38 [2022-04-06 12:05:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:41,258 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-04-06 12:05:41,258 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) [2022-04-06 12:05:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-04-06 12:05:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 12:05:41,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:41,259 INFO L499 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] [2022-04-06 12:05:41,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 12:05:41,474 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 [2022-04-06 12:05:41,474 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:41,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-04-06 12:05:41,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:41,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130942279] [2022-04-06 12:05:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:41,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:41,486 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:05:41,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606281344] [2022-04-06 12:05:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:41,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:41,494 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) [2022-04-06 12:05:41,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 12:05:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 12:05:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:05:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 12:05:41,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:05:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 12:05:41,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:41,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130942279] [2022-04-06 12:05:41,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:05:41,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606281344] [2022-04-06 12:05:41,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606281344] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 12:05:41,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 12:05:41,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 12:05:41,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153720497] [2022-04-06 12:05:41,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:05:41,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:05:41,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:41,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:05:41,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 12:05:41,912 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) [2022-04-06 12:05:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:41,964 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2022-04-06 12:05:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:05:41,965 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 [2022-04-06 12:05:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:41,966 INFO L225 Difference]: With dead ends: 120 [2022-04-06 12:05:41,966 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 12:05:41,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 12:05:41,967 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:05:41,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:05:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 12:05:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-04-06 12:05:41,978 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) [2022-04-06 12:05:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-04-06 12:05:41,979 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 46 [2022-04-06 12:05:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:41,980 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-04-06 12:05:41,980 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) [2022-04-06 12:05:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-04-06 12:05:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 12:05:41,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:41,981 INFO L499 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] [2022-04-06 12:05:42,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 12:05:42,198 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 [2022-04-06 12:05:42,198 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2022-04-06 12:05:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:42,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764288345] [2022-04-06 12:05:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:42,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:42,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:05:42,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006738734] [2022-04-06 12:05:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:42,230 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) [2022-04-06 12:05:42,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 12:05:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 12:05:42,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:05:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 12:05:42,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:05:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 12:05:42,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:42,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764288345] [2022-04-06 12:05:42,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:05:42,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006738734] [2022-04-06 12:05:42,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006738734] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:05:42,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:05:42,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 12:05:42,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385175635] [2022-04-06 12:05:42,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:05:42,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 12:05:42,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:42,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 12:05:42,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 12:05:42,531 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) [2022-04-06 12:05:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:42,689 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2022-04-06 12:05:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 12:05:42,690 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 [2022-04-06 12:05:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:42,692 INFO L225 Difference]: With dead ends: 207 [2022-04-06 12:05:42,693 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 12:05:42,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-04-06 12:05:42,694 INFO L913 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 [2022-04-06 12:05:42,694 INFO L914 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] [2022-04-06 12:05:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 12:05:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-04-06 12:05:42,712 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) [2022-04-06 12:05:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2022-04-06 12:05:42,714 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 54 [2022-04-06 12:05:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:42,714 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2022-04-06 12:05:42,714 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) [2022-04-06 12:05:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2022-04-06 12:05:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 12:05:42,716 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:42,716 INFO L499 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] [2022-04-06 12:05:42,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 12:05:42,933 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 [2022-04-06 12:05:42,934 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2022-04-06 12:05:42,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:42,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628522855] [2022-04-06 12:05:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:42,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:42,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:05:42,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143534192] [2022-04-06 12:05:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:42,952 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) [2022-04-06 12:05:42,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 12:05:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 12:05:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:05:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 12:05:43,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:05:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 12:05:43,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:05:43,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628522855] [2022-04-06 12:05:43,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:05:43,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143534192] [2022-04-06 12:05:43,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143534192] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:05:43,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:05:43,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 12:05:43,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842299037] [2022-04-06 12:05:43,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:05:43,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 12:05:43,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:05:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 12:05:43,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 12:05:43,659 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) [2022-04-06 12:05:43,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:05:43,935 INFO L93 Difference]: Finished difference Result 268 states and 340 transitions. [2022-04-06 12:05:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 12:05:43,936 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 [2022-04-06 12:05:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:05:43,938 INFO L225 Difference]: With dead ends: 268 [2022-04-06 12:05:43,938 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 12:05:43,938 INFO L912 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 [2022-04-06 12:05:43,939 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 58 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 12:05:43,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 231 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 12:05:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 12:05:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2022-04-06 12:05:43,960 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) [2022-04-06 12:05:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-04-06 12:05:43,961 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 54 [2022-04-06 12:05:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:05:43,961 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-04-06 12:05:43,962 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) [2022-04-06 12:05:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-04-06 12:05:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 12:05:43,962 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:05:43,963 INFO L499 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] [2022-04-06 12:05:43,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 12:05:44,183 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 [2022-04-06 12:05:44,184 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:05:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:05:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2022-04-06 12:05:44,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:05:44,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454233483] [2022-04-06 12:05:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:05:44,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:05:44,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557159236] [2022-04-06 12:05:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:05:44,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:05:44,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:05:44,199 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) [2022-04-06 12:05:44,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 12:05:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:05:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 12:05:44,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:05:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 12:05:45,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:06:14,680 WARN L232 SmtUtils]: Spent 14.73s 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) [2022-04-06 12:07:26,229 WARN L232 SmtUtils]: Spent 18.09s 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) [2022-04-06 12:08:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 12:08:58,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:08:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454233483] [2022-04-06 12:08:58,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:08:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557159236] [2022-04-06 12:08:58,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557159236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:08:58,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:08:58,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-06 12:08:58,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036601860] [2022-04-06 12:08:58,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:08:58,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 12:08:58,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:08:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 12:08:58,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=271, Unknown=1, NotChecked=0, Total=342 [2022-04-06 12:08:58,472 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) [2022-04-06 12:09:00,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:09:03,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:09:04,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:09:06,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:09:08,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:09:11,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:09:18,973 WARN L232 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 12:09:22,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:09:24,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:09:28,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:09:58,024 WARN L232 SmtUtils]: Spent 27.81s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 12:10:03,989 WARN L232 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 58 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 12:10:11,827 WARN L232 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 63 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 12:10:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:10:14,429 INFO L93 Difference]: Finished difference Result 369 states and 471 transitions. [2022-04-06 12:10:14,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 12:10:14,430 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 [2022-04-06 12:10:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:10:14,432 INFO L225 Difference]: With dead ends: 369 [2022-04-06 12:10:14,432 INFO L226 Difference]: Without dead ends: 293 [2022-04-06 12:10:14,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 84.9s TimeCoverageRelationStatistics Valid=162, Invalid=649, Unknown=1, NotChecked=0, Total=812 [2022-04-06 12:10:14,434 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 122 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:10:14,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 246 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 513 Invalid, 8 Unknown, 0 Unchecked, 27.1s Time] [2022-04-06 12:10:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-04-06 12:10:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 252. [2022-04-06 12:10:14,458 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) [2022-04-06 12:10:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2022-04-06 12:10:14,461 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 68 [2022-04-06 12:10:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:10:14,462 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2022-04-06 12:10:14,462 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) [2022-04-06 12:10:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2022-04-06 12:10:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 12:10:14,463 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:10:14,463 INFO L499 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] [2022-04-06 12:10:14,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 12:10:14,663 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 [2022-04-06 12:10:14,664 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:10:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:10:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2022-04-06 12:10:14,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:10:14,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102830005] [2022-04-06 12:10:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:10:14,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:10:14,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:10:14,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801141798] [2022-04-06 12:10:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:10:14,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:10:14,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:10:14,675 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) [2022-04-06 12:10:14,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 12:10:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:10:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 12:10:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:10:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 12:10:15,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:10:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:10:18,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102830005] [2022-04-06 12:10:18,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:10:18,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801141798] [2022-04-06 12:10:18,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801141798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 12:10:18,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 12:10:18,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 12:10:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601261852] [2022-04-06 12:10:18,633 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 12:10:18,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 12:10:18,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:10:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 12:10:18,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-04-06 12:10:18,633 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) [2022-04-06 12:10:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:10:19,988 INFO L93 Difference]: Finished difference Result 350 states and 433 transitions. [2022-04-06 12:10:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 12:10:19,989 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 [2022-04-06 12:10:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:10:19,990 INFO L225 Difference]: With dead ends: 350 [2022-04-06 12:10:19,991 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 12:10:19,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-04-06 12:10:19,992 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 12:10:19,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 368 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 12:10:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 12:10:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2022-04-06 12:10:20,023 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) [2022-04-06 12:10:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 320 transitions. [2022-04-06 12:10:20,024 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 320 transitions. Word has length 79 [2022-04-06 12:10:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:10:20,025 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 320 transitions. [2022-04-06 12:10:20,025 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) [2022-04-06 12:10:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 320 transitions. [2022-04-06 12:10:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 12:10:20,026 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:10:20,026 INFO L499 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] [2022-04-06 12:10:20,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 12:10:20,239 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 [2022-04-06 12:10:20,239 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:10:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:10:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash -911798983, now seen corresponding path program 2 times [2022-04-06 12:10:20,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:10:20,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811040325] [2022-04-06 12:10:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:10:20,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:10:20,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:10:20,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912169620] [2022-04-06 12:10:20,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 12:10:20,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:10:20,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:10:20,256 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) [2022-04-06 12:10:20,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 12:10:20,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 12:10:20,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 12:10:20,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 12:10:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:10:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 12:10:20,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:10:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 12:10:20,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:10:20,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811040325] [2022-04-06 12:10:20,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:10:20,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912169620] [2022-04-06 12:10:20,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912169620] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:10:20,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:10:20,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-04-06 12:10:20,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346259335] [2022-04-06 12:10:20,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:10:20,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:10:20,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:10:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:10:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:10:20,558 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) [2022-04-06 12:10:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:10:20,628 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2022-04-06 12:10:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 12:10:20,635 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 [2022-04-06 12:10:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:10:20,639 INFO L225 Difference]: With dead ends: 306 [2022-04-06 12:10:20,639 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 12:10:20,639 INFO L912 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 [2022-04-06 12:10:20,640 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:10:20,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 133 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:10:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 12:10:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2022-04-06 12:10:20,663 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) [2022-04-06 12:10:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 293 transitions. [2022-04-06 12:10:20,664 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 293 transitions. Word has length 82 [2022-04-06 12:10:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:10:20,664 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 293 transitions. [2022-04-06 12:10:20,664 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) [2022-04-06 12:10:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 293 transitions. [2022-04-06 12:10:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 12:10:20,665 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:10:20,665 INFO L499 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] [2022-04-06 12:10:20,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 12:10:20,883 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 [2022-04-06 12:10:20,883 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:10:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:10:20,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1053492757, now seen corresponding path program 1 times [2022-04-06 12:10:20,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:10:20,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680669294] [2022-04-06 12:10:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:10:20,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:10:20,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:10:20,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486656671] [2022-04-06 12:10:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:10:20,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:10:20,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:10:20,894 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) [2022-04-06 12:10:20,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 12:10:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:10:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 12:10:20,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:10:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 12:10:21,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:10:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 12:10:21,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:10:21,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680669294] [2022-04-06 12:10:21,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:10:21,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486656671] [2022-04-06 12:10:21,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486656671] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:10:21,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:10:21,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-06 12:10:21,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511444634] [2022-04-06 12:10:21,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:10:21,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 12:10:21,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:10:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 12:10:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 12:10:21,614 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) [2022-04-06 12:10:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:10:21,855 INFO L93 Difference]: Finished difference Result 254 states and 299 transitions. [2022-04-06 12:10:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 12:10:21,855 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 [2022-04-06 12:10:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:10:21,856 INFO L225 Difference]: With dead ends: 254 [2022-04-06 12:10:21,856 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 12:10:21,857 INFO L912 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 [2022-04-06 12:10:21,857 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 12:10:21,857 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 250 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 12:10:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 12:10:21,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-04-06 12:10:21,875 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) [2022-04-06 12:10:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2022-04-06 12:10:21,877 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 84 [2022-04-06 12:10:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:10:21,877 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2022-04-06 12:10:21,877 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) [2022-04-06 12:10:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2022-04-06 12:10:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 12:10:21,878 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:10:21,878 INFO L499 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] [2022-04-06 12:10:21,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 12:10:22,091 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 [2022-04-06 12:10:22,092 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:10:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:10:22,092 INFO L85 PathProgramCache]: Analyzing trace with hash -883405496, now seen corresponding path program 1 times [2022-04-06 12:10:22,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:10:22,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946921349] [2022-04-06 12:10:22,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:10:22,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:10:22,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:10:22,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836029122] [2022-04-06 12:10:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:10:22,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:10:22,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:10:22,116 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) [2022-04-06 12:10:22,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 12:10:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:10:22,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 12:10:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:10:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-06 12:10:22,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 12:10:22,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:10:22,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946921349] [2022-04-06 12:10:22,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:10:22,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836029122] [2022-04-06 12:10:22,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836029122] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:10:22,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:10:22,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 12:10:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335092707] [2022-04-06 12:10:22,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:10:22,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:10:22,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:10:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:10:22,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:10:22,355 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) [2022-04-06 12:10:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:10:22,426 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2022-04-06 12:10:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:10:22,426 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 [2022-04-06 12:10:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:10:22,428 INFO L225 Difference]: With dead ends: 249 [2022-04-06 12:10:22,428 INFO L226 Difference]: Without dead ends: 228 [2022-04-06 12:10:22,428 INFO L912 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 [2022-04-06 12:10:22,429 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 26 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:10:22,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 101 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:10:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-06 12:10:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2022-04-06 12:10:22,449 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) [2022-04-06 12:10:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2022-04-06 12:10:22,451 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 88 [2022-04-06 12:10:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:10:22,451 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2022-04-06 12:10:22,451 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) [2022-04-06 12:10:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2022-04-06 12:10:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 12:10:22,452 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:10:22,452 INFO L499 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] [2022-04-06 12:10:22,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 12:10:22,667 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 [2022-04-06 12:10:22,667 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:10:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:10:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2022-04-06 12:10:22,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:10:22,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946704523] [2022-04-06 12:10:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:10:22,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:10:22,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:10:22,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619753209] [2022-04-06 12:10:22,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 12:10:22,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:10:22,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:10:22,676 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) [2022-04-06 12:10:22,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 12:10:23,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 12:10:23,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 12:10:23,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 12:10:23,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:10:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 31 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 12:10:23,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:11:10,802 WARN L232 SmtUtils]: Spent 31.65s 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) [2022-04-06 12:12:37,110 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse28 (< c_main_~d~0 0)) (.cse4 (= (mod c_main_~d~0 2) 0)) (.cse2 (div c_main_~d~0 2))) (let ((.cse8 (mod c_main_~A~0 4294967296)) (.cse3 (+ .cse2 1)) (.cse0 (and .cse28 (not .cse4))) (.cse15 (= (mod c_main_~p~0 2) 0)) (.cse16 (< c_main_~p~0 0)) (.cse13 (mod c_main_~B~0 4294967296)) (.cse17 (div c_main_~p~0 2))) (and (let ((.cse14 (+ .cse17 1))) (let ((.cse1 (* .cse14 .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2))) (or (not (= .cse3 .cse1)) .cse4)) (let ((.cse12 (div .cse14 2)) (.cse9 (= (mod .cse14 2) 0))) (let ((.cse10 (not .cse9)) (.cse11 (* (+ c_main_~q~0 .cse12) .cse13)) (.cse6 (* (- 1) (div .cse1 2))) (.cse7 (* (+ c_main_~q~0 .cse12 1) .cse13)) (.cse5 (= (mod .cse1 2) 0))) (and (or (not .cse5) (and (or (= (+ .cse6 c_main_~r~0 .cse7) .cse8) .cse9) (or .cse10 (= .cse8 (+ .cse6 .cse11 c_main_~r~0))))) (or (and (or .cse10 (= (+ (- 1) .cse6 .cse11 c_main_~r~0) .cse8)) (or (= (+ (- 1) .cse6 c_main_~r~0 .cse7) .cse8) .cse9)) .cse5)))) .cse15 (not .cse16)))) (let ((.cse26 (* .cse13 .cse17))) (or (let ((.cse24 (= (mod .cse17 2) 0)) (.cse27 (div .cse17 2))) (let ((.cse18 (= (mod .cse26 2) 0)) (.cse22 (* (+ c_main_~q~0 .cse27) .cse13)) (.cse20 (not .cse24)) (.cse25 (* (+ c_main_~q~0 .cse27 1) .cse13)) (.cse23 (* (- 1) (div .cse26 2))) (.cse19 (< .cse26 0))) (and (or (and (not .cse18) .cse19) (let ((.cse21 (< .cse17 0))) (and (or (and .cse20 .cse21) (= .cse8 (+ .cse22 .cse23 c_main_~r~0))) (or (not .cse21) .cse24 (= (+ .cse25 .cse23 c_main_~r~0) .cse8))))) (or .cse18 (and (or (= (+ (- 1) .cse22 .cse23 c_main_~r~0) .cse8) .cse20) (or .cse24 (= .cse8 (+ (- 1) .cse25 .cse23 c_main_~r~0)))) (not .cse19))))) (and (or (not (= .cse3 .cse26)) .cse4 (not .cse28)) (or .cse0 (not (= .cse2 .cse26)))) (and (not .cse15) .cse16)))))) is different from true [2022-04-06 12:19:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 11 refuted. 0 times theorem prover too weak. 276 trivial. 20 not checked. [2022-04-06 12:19:35,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:19:35,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946704523] [2022-04-06 12:19:35,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:19:35,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619753209] [2022-04-06 12:19:35,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619753209] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:19:35,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:19:35,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-04-06 12:19:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660045837] [2022-04-06 12:19:35,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:19:35,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 12:19:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:19:35,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 12:19:35,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=345, Unknown=2, NotChecked=38, Total=462 [2022-04-06 12:19:35,897 INFO L87 Difference]: Start difference. First operand 218 states and 251 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 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) [2022-04-06 12:19:38,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:19:40,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:19:42,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:19:44,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:19:47,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:20:01,806 WARN L232 SmtUtils]: Spent 14.10s on a formula simplification. DAG size of input: 144 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)