/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 07:18:07,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 07:18:07,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 07:18:07,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 07:18:07,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 07:18:07,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 07:18:07,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 07:18:07,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 07:18:07,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 07:18:07,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 07:18:07,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 07:18:07,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 07:18:07,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 07:18:07,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 07:18:07,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 07:18:07,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 07:18:07,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 07:18:07,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 07:18:07,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 07:18:07,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 07:18:07,390 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 07:18:07,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 07:18:07,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 07:18:07,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 07:18:07,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 07:18:07,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 07:18:07,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 07:18:07,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 07:18:07,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 07:18:07,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 07:18:07,413 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 07:18:07,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 07:18:07,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 07:18:07,414 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 07:18:07,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 07:18:07,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 07:18:07,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 07:18:07,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 07:18:07,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 07:18:07,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 07:18:07,415 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 07:18:07,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 07:18:07,415 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 07:18:07,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 07:18:07,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 07:18:07,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 07:18:07,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 07:18:07,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 07:18:07,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:18:07,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 07:18:07,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 07:18:07,425 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 07:18:07,425 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 07:18:07,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 07:18:07,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 07:18:07,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 07:18:07,620 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 07:18:07,621 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 07:18:07,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2022-04-06 07:18:07,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7865248ab/46f3a233e86741eb9d01aa152c2fc3b7/FLAGcf19735da [2022-04-06 07:18:08,018 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 07:18:08,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2022-04-06 07:18:08,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7865248ab/46f3a233e86741eb9d01aa152c2fc3b7/FLAGcf19735da [2022-04-06 07:18:08,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7865248ab/46f3a233e86741eb9d01aa152c2fc3b7 [2022-04-06 07:18:08,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 07:18:08,466 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 07:18:08,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 07:18:08,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 07:18:08,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 07:18:08,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4893d0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08, skipping insertion in model container [2022-04-06 07:18:08,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 07:18:08,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 07:18:08,663 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c[537,550] [2022-04-06 07:18:08,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:18:08,694 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 07:18:08,705 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c[537,550] [2022-04-06 07:18:08,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:18:08,726 INFO L208 MainTranslator]: Completed translation [2022-04-06 07:18:08,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08 WrapperNode [2022-04-06 07:18:08,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 07:18:08,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 07:18:08,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 07:18:08,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 07:18:08,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 07:18:08,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 07:18:08,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 07:18:08,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 07:18:08,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08" (1/1) ... [2022-04-06 07:18:08,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:18:08,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:08,783 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 07:18:08,816 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 07:18:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 07:18:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 07:18:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 07:18:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 07:18:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 07:18:08,832 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 07:18:08,832 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 07:18:08,832 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 07:18:08,832 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 07:18:08,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 07:18:08,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 07:18:08,833 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 07:18:08,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 07:18:08,833 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 07:18:08,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 07:18:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 07:18:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 07:18:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 07:18:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 07:18:08,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 07:18:08,886 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 07:18:08,887 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 07:18:09,004 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 07:18:09,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 07:18:09,008 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 07:18:09,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:18:09 BoogieIcfgContainer [2022-04-06 07:18:09,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 07:18:09,023 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 07:18:09,023 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 07:18:09,024 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 07:18:09,027 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:18:09" (1/1) ... [2022-04-06 07:18:09,031 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 07:18:09,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:18:09 BasicIcfg [2022-04-06 07:18:09,053 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 07:18:09,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 07:18:09,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 07:18:09,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 07:18:09,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:18:08" (1/4) ... [2022-04-06 07:18:09,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92d3544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:18:09, skipping insertion in model container [2022-04-06 07:18:09,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:18:08" (2/4) ... [2022-04-06 07:18:09,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92d3544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:18:09, skipping insertion in model container [2022-04-06 07:18:09,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:18:09" (3/4) ... [2022-04-06 07:18:09,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@92d3544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:18:09, skipping insertion in model container [2022-04-06 07:18:09,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:18:09" (4/4) ... [2022-04-06 07:18:09,059 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.cJordan [2022-04-06 07:18:09,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 07:18:09,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 07:18:09,099 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 07:18:09,105 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 07:18:09,105 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 07:18:09,115 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 07:18:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 07:18:09,121 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:09,122 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 07:18:09,123 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-04-06 07:18:09,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:09,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929789847] [2022-04-06 07:18:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:09,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:09,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:18:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:09,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:18:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:09,270 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 07:18:09,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:09,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929789847] [2022-04-06 07:18:09,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929789847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:09,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:09,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 07:18:09,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109303279] [2022-04-06 07:18:09,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:09,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 07:18:09,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:09,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 07:18:09,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 07:18:09,297 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 07:18:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:09,395 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-04-06 07:18:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 07:18:09,397 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 07:18:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:09,405 INFO L225 Difference]: With dead ends: 38 [2022-04-06 07:18:09,405 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 07:18:09,406 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 07:18:09,416 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 07:18:09,416 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 07:18:09,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 07:18:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-06 07:18:09,449 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 07:18:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 07:18:09,450 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-04-06 07:18:09,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:09,451 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 07:18:09,451 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 07:18:09,451 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 07:18:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 07:18:09,452 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:09,452 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 07:18:09,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 07:18:09,453 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-04-06 07:18:09,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:09,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129742168] [2022-04-06 07:18:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:09,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:09,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:18:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:09,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:18:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:09,582 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 07:18:09,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:09,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129742168] [2022-04-06 07:18:09,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129742168] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:09,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:09,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:18:09,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182216459] [2022-04-06 07:18:09,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:09,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:18:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:18:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:18:09,585 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 07:18:09,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:09,748 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-04-06 07:18:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 07:18:09,749 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 07:18:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:09,750 INFO L225 Difference]: With dead ends: 45 [2022-04-06 07:18:09,750 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 07:18:09,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:18:09,754 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 07:18:09,755 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 07:18:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 07:18:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-04-06 07:18:09,768 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 07:18:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-06 07:18:09,775 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-04-06 07:18:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:09,775 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-06 07:18:09,775 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 07:18:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-06 07:18:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 07:18:09,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:09,776 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 07:18:09,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 07:18:09,776 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-04-06 07:18:09,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:09,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44790491] [2022-04-06 07:18:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:09,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:09,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664038494] [2022-04-06 07:18:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:09,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:09,812 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 07:18:09,814 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 07:18:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:09,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 07:18:09,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:09,939 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 07:18:09,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:18:09,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44790491] [2022-04-06 07:18:09,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664038494] [2022-04-06 07:18:09,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664038494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:09,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:09,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 07:18:09,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311731184] [2022-04-06 07:18:09,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:09,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 07:18:09,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:09,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 07:18:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 07:18:09,942 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 07:18:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:09,949 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-04-06 07:18:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 07:18:09,949 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 07:18:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:09,950 INFO L225 Difference]: With dead ends: 38 [2022-04-06 07:18:09,950 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 07:18:09,950 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 07:18:09,951 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 07:18:09,951 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 07:18:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 07:18:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 07:18:09,954 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 07:18:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-04-06 07:18:09,954 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-04-06 07:18:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:09,955 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-04-06 07:18:09,955 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 07:18:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-04-06 07:18:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 07:18:09,955 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:09,955 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 07:18:09,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 07:18:10,160 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 07:18:10,161 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:10,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-04-06 07:18:10,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:10,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584474467] [2022-04-06 07:18:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:10,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:10,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:18:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:10,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:18:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:10,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 07:18:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:10,281 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 07:18:10,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:10,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584474467] [2022-04-06 07:18:10,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584474467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:10,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:10,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:18:10,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789288788] [2022-04-06 07:18:10,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:10,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:18:10,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:10,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:18:10,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:18:10,283 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 07:18:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:10,421 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-04-06 07:18:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 07:18:10,422 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 07:18:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:10,424 INFO L225 Difference]: With dead ends: 50 [2022-04-06 07:18:10,424 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 07:18:10,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:18:10,425 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 07:18:10,425 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 07:18:10,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 07:18:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-04-06 07:18:10,428 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 07:18:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 07:18:10,429 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-04-06 07:18:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:10,429 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 07:18:10,429 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 07:18:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 07:18:10,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 07:18:10,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:10,430 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 07:18:10,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 07:18:10,430 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:10,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:10,431 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-04-06 07:18:10,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:10,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733559066] [2022-04-06 07:18:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:10,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:10,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:10,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201661401] [2022-04-06 07:18:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:10,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:10,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:10,464 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 07:18:10,465 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 07:18:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:10,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:18:10,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:10,606 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 07:18:10,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:18:10,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733559066] [2022-04-06 07:18:10,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:10,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201661401] [2022-04-06 07:18:10,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201661401] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:10,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:10,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:18:10,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728588929] [2022-04-06 07:18:10,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:10,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:18:10,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:10,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:18:10,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:18:10,610 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 07:18:12,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 07:18:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:12,851 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-04-06 07:18:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:18:12,851 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 07:18:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:12,852 INFO L225 Difference]: With dead ends: 57 [2022-04-06 07:18:12,852 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 07:18:12,852 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 07:18:12,853 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:12,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 140 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 07:18:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 07:18:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 07:18:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 07:18:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-04-06 07:18:12,859 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-04-06 07:18:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:12,860 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-04-06 07:18:12,860 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 07:18:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-04-06 07:18:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 07:18:12,860 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:12,861 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 07:18:12,879 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 07:18:13,071 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 07:18:13,072 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:13,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:13,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-04-06 07:18:13,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:13,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965299033] [2022-04-06 07:18:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:13,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:13,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882350548] [2022-04-06 07:18:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:13,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:13,083 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 07:18:13,084 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 07:18:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:18:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:13,230 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 07:18:13,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:18:13,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:13,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965299033] [2022-04-06 07:18:13,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:13,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882350548] [2022-04-06 07:18:13,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882350548] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:13,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:13,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:18:13,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892948344] [2022-04-06 07:18:13,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:13,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:18:13,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:13,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:18:13,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:18:13,232 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 07:18:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:13,264 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-04-06 07:18:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:18:13,265 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 07:18:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:13,265 INFO L225 Difference]: With dead ends: 69 [2022-04-06 07:18:13,266 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 07:18:13,266 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 07:18:13,266 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:13,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:18:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 07:18:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 07:18:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 07:18:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-04-06 07:18:13,272 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-04-06 07:18:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:13,273 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-04-06 07:18:13,273 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 07:18:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-04-06 07:18:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 07:18:13,274 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:13,274 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 07:18:13,292 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 07:18:13,492 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 07:18:13,492 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-04-06 07:18:13,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:13,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773930688] [2022-04-06 07:18:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:13,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:13,501 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:13,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443334181] [2022-04-06 07:18:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:13,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:13,507 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 07:18:13,509 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 07:18:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:13,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 07:18:13,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:13,767 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 07:18:13,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:18:13,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:13,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773930688] [2022-04-06 07:18:13,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:13,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443334181] [2022-04-06 07:18:13,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443334181] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:18:13,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:18:13,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:18:13,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151595766] [2022-04-06 07:18:13,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:13,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:18:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:18:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:18:13,779 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 07:18:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:13,943 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2022-04-06 07:18:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 07:18:13,944 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 07:18:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:13,945 INFO L225 Difference]: With dead ends: 80 [2022-04-06 07:18:13,945 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 07:18:13,945 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 07:18:13,946 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:13,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 162 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:18:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 07:18:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-06 07:18:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 07:18:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-04-06 07:18:13,951 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-04-06 07:18:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:13,951 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-04-06 07:18:13,951 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 07:18:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-04-06 07:18:13,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 07:18:13,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:13,956 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 07:18:13,981 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 07:18:14,156 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 07:18:14,157 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:14,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-04-06 07:18:14,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:14,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931543444] [2022-04-06 07:18:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:14,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:14,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:14,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147605767] [2022-04-06 07:18:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:14,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:14,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:14,174 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 07:18:14,175 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 07:18:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:14,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:18:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:14,311 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 07:18:14,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:18:14,423 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 07:18:14,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:14,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931543444] [2022-04-06 07:18:14,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:14,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147605767] [2022-04-06 07:18:14,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147605767] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:18:14,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:18:14,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 07:18:14,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096905785] [2022-04-06 07:18:14,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:18:14,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 07:18:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 07:18:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 07:18:14,426 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 07:18:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:14,560 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2022-04-06 07:18:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 07:18:14,561 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 07:18:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:14,563 INFO L225 Difference]: With dead ends: 146 [2022-04-06 07:18:14,563 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 07:18:14,564 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 07:18:14,564 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 54 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:14,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 248 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:18:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 07:18:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-04-06 07:18:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 07:18:14,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-04-06 07:18:14,582 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-04-06 07:18:14,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:14,582 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-04-06 07:18:14,582 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 07:18:14,582 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-04-06 07:18:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 07:18:14,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:14,586 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 07:18:14,609 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 07:18:14,786 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 07:18:14,787 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:14,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-04-06 07:18:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:14,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531053493] [2022-04-06 07:18:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:14,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:14,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:14,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438203459] [2022-04-06 07:18:14,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:14,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:14,803 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 07:18:14,804 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 07:18:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:14,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 07:18:14,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:15,145 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 07:18:15,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:18:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 07:18:15,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:15,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531053493] [2022-04-06 07:18:15,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:15,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438203459] [2022-04-06 07:18:15,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438203459] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 07:18:15,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 07:18:15,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-06 07:18:15,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914605870] [2022-04-06 07:18:15,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:18:15,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:18:15,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:18:15,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:18:15,372 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 07:18:17,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:18:20,034 WARN L534 Checker$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 07:18:22,198 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 07:18:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:22,667 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2022-04-06 07:18:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:18:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-04-06 07:18:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:22,669 INFO L225 Difference]: With dead ends: 160 [2022-04-06 07:18:22,669 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 07:18:22,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 07:18:22,671 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:22,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 132 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2022-04-06 07:18:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 07:18:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-04-06 07:18:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 07:18:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-04-06 07:18:22,687 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-04-06 07:18:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:22,687 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-04-06 07:18:22,687 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 07:18:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-04-06 07:18:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 07:18:22,688 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:22,688 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:22,692 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 07:18:22,893 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 07:18:22,893 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-04-06 07:18:22,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:22,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762676674] [2022-04-06 07:18:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:22,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:22,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:22,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289316587] [2022-04-06 07:18:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:22,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:22,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:22,907 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 07:18:22,908 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 07:18:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:18:22,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 07:18:22,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:18:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 07:18:23,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:18:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 07:18:23,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:18:23,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762676674] [2022-04-06 07:18:23,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:18:23,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289316587] [2022-04-06 07:18:23,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289316587] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:18:23,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:18:23,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 07:18:23,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042212559] [2022-04-06 07:18:23,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:18:23,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 07:18:23,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:18:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 07:18:23,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-06 07:18:23,172 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 07:18:23,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:18:23,325 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2022-04-06 07:18:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 07:18:23,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 50 [2022-04-06 07:18:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:18:23,327 INFO L225 Difference]: With dead ends: 210 [2022-04-06 07:18:23,327 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 07:18:23,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-04-06 07:18:23,327 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 72 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:18:23,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 212 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:18:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 07:18:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 205. [2022-04-06 07:18:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 132 states have (on average 1.1893939393939394) internal successors, (157), 141 states have internal predecessors, (157), 47 states have call successors, (47), 26 states have call predecessors, (47), 25 states have return successors, (43), 37 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 07:18:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2022-04-06 07:18:23,336 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 50 [2022-04-06 07:18:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:18:23,337 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2022-04-06 07:18:23,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 07:18:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2022-04-06 07:18:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 07:18:23,337 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:18:23,338 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:18:23,361 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 07:18:23,538 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 07:18:23,538 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:18:23,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:18:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-04-06 07:18:23,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:18:23,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251908092] [2022-04-06 07:18:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:23,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:18:23,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:18:23,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117927548] [2022-04-06 07:18:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:18:23,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:18:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:18:23,548 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 07:18:23,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process