/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/ps6-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 20:54:41,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 20:54:41,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 20:54:41,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 20:54:41,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 20:54:41,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 20:54:41,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 20:54:41,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 20:54:41,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 20:54:41,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 20:54:41,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 20:54:41,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 20:54:41,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 20:54:41,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 20:54:41,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 20:54:41,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 20:54:41,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 20:54:41,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 20:54:41,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 20:54:41,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 20:54:41,790 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 20:54:41,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 20:54:41,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 20:54:41,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 20:54:41,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 20:54:41,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 20:54:41,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 20:54:41,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 20:54:41,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 20:54:41,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 20:54:41,811 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 20:54:41,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 20:54:41,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 20:54:41,812 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 20:54:41,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 20:54:41,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 20:54:41,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 20:54:41,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 20:54:41,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 20:54:41,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 20:54:41,813 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 20:54:41,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 20:54:41,813 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 20:54:41,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 20:54:41,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 20:54:41,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 20:54:41,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 20:54:41,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 20:54:41,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:54:41,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 20:54:41,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 20:54:41,814 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 20:54:41,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 20:54:41,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 20:54:41,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 20:54:42,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 20:54:42,001 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 20:54:42,001 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 20:54:42,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound100.c [2022-03-18 20:54:42,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfab58e7c/3f4a03af291e4cd9975e3ac93ebe797b/FLAG8d70eabf2 [2022-03-18 20:54:42,432 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 20:54:42,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound100.c [2022-03-18 20:54:42,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfab58e7c/3f4a03af291e4cd9975e3ac93ebe797b/FLAG8d70eabf2 [2022-03-18 20:54:42,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfab58e7c/3f4a03af291e4cd9975e3ac93ebe797b [2022-03-18 20:54:42,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 20:54:42,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 20:54:42,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 20:54:42,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 20:54:42,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 20:54:42,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:54:42" (1/1) ... [2022-03-18 20:54:42,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce219ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:42, skipping insertion in model container [2022-03-18 20:54:42,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:54:42" (1/1) ... [2022-03-18 20:54:42,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 20:54:42,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 20:54:42,996 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/ps6-ll_valuebound100.c[458,471] [2022-03-18 20:54:43,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:54:43,023 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 20:54:43,030 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/ps6-ll_valuebound100.c[458,471] [2022-03-18 20:54:43,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:54:43,045 INFO L208 MainTranslator]: Completed translation [2022-03-18 20:54:43,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43 WrapperNode [2022-03-18 20:54:43,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 20:54:43,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 20:54:43,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 20:54:43,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 20:54:43,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43" (1/1) ... [2022-03-18 20:54:43,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43" (1/1) ... [2022-03-18 20:54:43,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43" (1/1) ... [2022-03-18 20:54:43,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43" (1/1) ... [2022-03-18 20:54:43,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43" (1/1) ... [2022-03-18 20:54:43,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43" (1/1) ... [2022-03-18 20:54:43,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43" (1/1) ... [2022-03-18 20:54:43,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 20:54:43,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 20:54:43,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 20:54:43,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 20:54:43,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43" (1/1) ... [2022-03-18 20:54:43,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:54:43,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:43,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 20:54:43,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 20:54:43,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 20:54:43,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 20:54:43,139 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 20:54:43,139 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 20:54:43,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 20:54:43,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 20:54:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 20:54:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 20:54:43,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 20:54:43,180 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 20:54:43,181 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 20:54:43,304 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 20:54:43,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 20:54:43,308 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 20:54:43,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:54:43 BoogieIcfgContainer [2022-03-18 20:54:43,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 20:54:43,310 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 20:54:43,310 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 20:54:43,311 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 20:54:43,313 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:54:43" (1/1) ... [2022-03-18 20:54:43,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:54:43 BasicIcfg [2022-03-18 20:54:43,324 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 20:54:43,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 20:54:43,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 20:54:43,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 20:54:43,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 08:54:42" (1/4) ... [2022-03-18 20:54:43,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5994194f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:54:43, skipping insertion in model container [2022-03-18 20:54:43,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:54:43" (2/4) ... [2022-03-18 20:54:43,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5994194f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:54:43, skipping insertion in model container [2022-03-18 20:54:43,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:54:43" (3/4) ... [2022-03-18 20:54:43,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5994194f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:54:43, skipping insertion in model container [2022-03-18 20:54:43,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:54:43" (4/4) ... [2022-03-18 20:54:43,330 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound100.cJordan [2022-03-18 20:54:43,333 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 20:54:43,333 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 20:54:43,364 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 20:54:43,372 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 [2022-03-18 20:54:43,373 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 20:54:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 20:54:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 20:54:43,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:43,396 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:43,396 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:43,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2022-03-18 20:54:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:43,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501214133] [2022-03-18 20:54:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:54:43,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 20:54:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:54:43,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 20:54:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:54:43,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 20:54:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:54:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:54:43,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:54:43,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501214133] [2022-03-18 20:54:43,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501214133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:54:43,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:54:43,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 20:54:43,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321045952] [2022-03-18 20:54:43,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:54:43,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 20:54:43,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:54:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 20:54:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:54:43,575 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 20:54:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:54:43,619 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-03-18 20:54:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 20:54:43,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 20:54:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:54:43,638 INFO L225 Difference]: With dead ends: 29 [2022-03-18 20:54:43,638 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 20:54:43,639 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:54:43,642 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:54:43,642 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:54:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 20:54:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-18 20:54:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 20:54:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-18 20:54:43,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-18 20:54:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:54:43,688 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-18 20:54:43,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 20:54:43,688 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-18 20:54:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 20:54:43,689 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:43,689 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:43,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 20:54:43,689 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:43,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:43,690 INFO L85 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2022-03-18 20:54:43,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:43,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058059580] [2022-03-18 20:54:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:43,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:43,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:54:43,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187080659] [2022-03-18 20:54:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:43,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:43,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:43,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:54:43,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 20:54:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:54:43,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 20:54:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:54:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:54:43,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 20:54:43,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:54:43,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058059580] [2022-03-18 20:54:43,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:54:43,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187080659] [2022-03-18 20:54:43,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187080659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:54:43,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:54:43,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 20:54:43,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106596109] [2022-03-18 20:54:43,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:54:43,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 20:54:43,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:54:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 20:54:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 20:54:43,903 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 20:54:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:54:43,980 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-03-18 20:54:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:54:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-18 20:54:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:54:43,982 INFO L225 Difference]: With dead ends: 33 [2022-03-18 20:54:43,982 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 20:54:43,982 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 20:54:43,983 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:54:43,983 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:54:43,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 20:54:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 20:54:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 20:54:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-18 20:54:43,989 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-03-18 20:54:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:54:43,989 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-18 20:54:43,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 20:54:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-18 20:54:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 20:54:43,990 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:43,990 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:44,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 20:54:44,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:44,205 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:44,206 INFO L85 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2022-03-18 20:54:44,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:44,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694081406] [2022-03-18 20:54:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:44,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:44,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:54:44,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200460839] [2022-03-18 20:54:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:44,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:44,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:54:44,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 20:54:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:54:44,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 20:54:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:54:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:54:44,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:54:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 20:54:45,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:54:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694081406] [2022-03-18 20:54:45,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:54:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200460839] [2022-03-18 20:54:45,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200460839] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 20:54:45,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:54:45,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 20:54:45,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939135053] [2022-03-18 20:54:45,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:54:45,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 20:54:45,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:54:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 20:54:45,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 20:54:45,175 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 20:54:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:54:45,201 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-03-18 20:54:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:54:45,201 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 29 [2022-03-18 20:54:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:54:45,202 INFO L225 Difference]: With dead ends: 35 [2022-03-18 20:54:45,202 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 20:54:45,202 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 20:54:45,203 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:54:45,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:54:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 20:54:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 20:54:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 20:54:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-03-18 20:54:45,207 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-03-18 20:54:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:54:45,208 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-03-18 20:54:45,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 20:54:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-03-18 20:54:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 20:54:45,209 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:45,209 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:45,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 20:54:45,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 20:54:45,413 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:45,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2022-03-18 20:54:45,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:45,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266353595] [2022-03-18 20:54:45,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:45,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:45,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:54:45,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196846376] [2022-03-18 20:54:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:45,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:45,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:54:45,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 20:54:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:54:45,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 20:54:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:54:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 20:54:45,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:54:45,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:54:45,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266353595] [2022-03-18 20:54:45,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:54:45,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196846376] [2022-03-18 20:54:45,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196846376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:54:45,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:54:45,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 20:54:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808358569] [2022-03-18 20:54:45,838 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:54:45,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 20:54:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:54:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 20:54:45,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 20:54:45,839 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 20:54:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:54:45,906 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-18 20:54:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 20:54:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-03-18 20:54:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:54:45,908 INFO L225 Difference]: With dead ends: 40 [2022-03-18 20:54:45,908 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 20:54:45,908 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:54:45,909 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:54:45,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:54:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 20:54:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-18 20:54:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 20:54:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-18 20:54:45,913 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-03-18 20:54:45,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:54:45,914 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-18 20:54:45,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-18 20:54:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-18 20:54:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 20:54:45,915 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:45,915 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:45,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 20:54:46,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:46,132 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:46,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:46,132 INFO L85 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2022-03-18 20:54:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:46,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894984436] [2022-03-18 20:54:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:46,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:46,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:54:46,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606512416] [2022-03-18 20:54:46,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:54:46,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:46,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:46,144 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:54:46,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 20:54:46,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:54:46,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:54:46,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 20:54:46,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:54:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 20:54:46,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:54:46,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:54:46,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894984436] [2022-03-18 20:54:46,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:54:46,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606512416] [2022-03-18 20:54:46,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606512416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:54:46,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:54:46,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-18 20:54:46,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764612749] [2022-03-18 20:54:46,559 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:54:46,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 20:54:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:54:46,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 20:54:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 20:54:46,560 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 20:54:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:54:46,616 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-18 20:54:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 20:54:46,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-03-18 20:54:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:54:46,617 INFO L225 Difference]: With dead ends: 43 [2022-03-18 20:54:46,617 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 20:54:46,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-18 20:54:46,618 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:54:46,618 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:54:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 20:54:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-18 20:54:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 20:54:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-03-18 20:54:46,622 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-03-18 20:54:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:54:46,622 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-03-18 20:54:46,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 20:54:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-03-18 20:54:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 20:54:46,623 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:46,623 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:46,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 20:54:46,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:46,828 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2022-03-18 20:54:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292628657] [2022-03-18 20:54:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:46,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:54:46,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725031063] [2022-03-18 20:54:46,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:54:46,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:46,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:46,847 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:54:46,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 20:54:46,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 20:54:46,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:54:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 20:54:46,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:54:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 20:54:47,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:54:47,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:54:47,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292628657] [2022-03-18 20:54:47,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:54:47,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725031063] [2022-03-18 20:54:47,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725031063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:54:47,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:54:47,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 20:54:47,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950316886] [2022-03-18 20:54:47,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:54:47,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 20:54:47,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:54:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 20:54:47,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:54:47,266 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 20:54:47,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:54:47,335 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-03-18 20:54:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 20:54:47,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-03-18 20:54:47,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:54:47,336 INFO L225 Difference]: With dead ends: 46 [2022-03-18 20:54:47,336 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 20:54:47,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-18 20:54:47,337 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:54:47,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:54:47,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 20:54:47,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-18 20:54:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 20:54:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-18 20:54:47,342 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-03-18 20:54:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:54:47,342 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-18 20:54:47,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 20:54:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-18 20:54:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 20:54:47,343 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:47,343 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:47,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-18 20:54:47,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:47,548 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2022-03-18 20:54:47,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:47,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578790910] [2022-03-18 20:54:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:47,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:47,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:54:47,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311067331] [2022-03-18 20:54:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 20:54:47,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:47,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:47,558 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:54:47,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 20:54:47,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 20:54:47,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:54:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 20:54:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:54:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 20:54:47,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:54:47,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:54:47,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578790910] [2022-03-18 20:54:47,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:54:47,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311067331] [2022-03-18 20:54:47,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311067331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:54:47,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:54:47,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 20:54:47,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387339035] [2022-03-18 20:54:47,895 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:54:47,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 20:54:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:54:47,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 20:54:47,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-18 20:54:47,896 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-18 20:54:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:54:47,986 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-03-18 20:54:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 20:54:47,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-03-18 20:54:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:54:47,988 INFO L225 Difference]: With dead ends: 49 [2022-03-18 20:54:47,988 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 20:54:47,988 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-18 20:54:47,988 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:54:47,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:54:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 20:54:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-18 20:54:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 20:54:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-03-18 20:54:47,992 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-03-18 20:54:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:54:47,992 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-03-18 20:54:47,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-03-18 20:54:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-03-18 20:54:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 20:54:47,993 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:47,993 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:48,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 20:54:48,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:48,203 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2022-03-18 20:54:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:48,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513400072] [2022-03-18 20:54:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:48,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:48,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:54:48,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494651473] [2022-03-18 20:54:48,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 20:54:48,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:48,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:48,213 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:54:48,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 20:54:48,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-18 20:54:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:54:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 20:54:48,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:54:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 20:54:48,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:54:49,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:54:49,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513400072] [2022-03-18 20:54:49,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:54:49,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494651473] [2022-03-18 20:54:49,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494651473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:54:49,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:54:49,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 20:54:49,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545704542] [2022-03-18 20:54:49,080 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:54:49,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 20:54:49,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:54:49,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 20:54:49,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-18 20:54:49,081 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-18 20:54:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:54:49,220 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-18 20:54:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 20:54:49,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-03-18 20:54:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:54:49,221 INFO L225 Difference]: With dead ends: 52 [2022-03-18 20:54:49,221 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 20:54:49,222 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-18 20:54:49,222 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:54:49,222 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 339 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:54:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 20:54:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-18 20:54:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 20:54:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-03-18 20:54:49,235 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-03-18 20:54:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:54:49,236 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-03-18 20:54:49,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-03-18 20:54:49,236 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-03-18 20:54:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 20:54:49,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:49,240 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:49,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 20:54:49,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:49,445 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:49,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2022-03-18 20:54:49,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:49,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686080631] [2022-03-18 20:54:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:49,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:54:49,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233550526] [2022-03-18 20:54:49,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 20:54:49,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:49,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:49,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:54:49,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 20:54:49,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 20:54:49,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:54:49,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 20:54:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:54:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 20:54:50,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:54:50,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:54:50,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686080631] [2022-03-18 20:54:50,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:54:50,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233550526] [2022-03-18 20:54:50,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233550526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:54:50,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:54:50,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 20:54:50,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369797439] [2022-03-18 20:54:50,580 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:54:50,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 20:54:50,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:54:50,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 20:54:50,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-18 20:54:50,581 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-18 20:54:50,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:54:50,707 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-03-18 20:54:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 20:54:50,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-03-18 20:54:50,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:54:50,708 INFO L225 Difference]: With dead ends: 55 [2022-03-18 20:54:50,708 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 20:54:50,708 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-18 20:54:50,709 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:54:50,709 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 395 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:54:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 20:54:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-18 20:54:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 20:54:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-03-18 20:54:50,712 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-03-18 20:54:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:54:50,712 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-03-18 20:54:50,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-18 20:54:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-03-18 20:54:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-18 20:54:50,713 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:54:50,713 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:54:50,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 20:54:50,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 20:54:50,914 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:54:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:54:50,915 INFO L85 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2022-03-18 20:54:50,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:54:50,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342588580] [2022-03-18 20:54:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:54:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:54:50,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:54:50,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910970753] [2022-03-18 20:54:50,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 20:54:50,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:54:50,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:54:50,938 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:54:50,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 20:55:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:55:58,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 20:55:58,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:55:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 20:55:58,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:55:58,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:55:58,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342588580] [2022-03-18 20:55:58,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:55:58,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910970753] [2022-03-18 20:55:58,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910970753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:55:58,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:55:58,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-18 20:55:58,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588677339] [2022-03-18 20:55:58,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:55:58,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 20:55:58,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:55:58,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 20:55:58,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-18 20:55:58,726 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-18 20:55:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:55:58,842 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-03-18 20:55:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 20:55:58,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-03-18 20:55:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:55:58,843 INFO L225 Difference]: With dead ends: 58 [2022-03-18 20:55:58,843 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 20:55:58,843 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-18 20:55:58,843 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:55:58,844 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 455 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:55:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 20:55:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-18 20:55:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 20:55:58,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-03-18 20:55:58,846 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-03-18 20:55:58,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:55:58,847 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-03-18 20:55:58,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-03-18 20:55:58,847 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-03-18 20:55:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 20:55:58,847 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:55:58,848 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:55:58,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 20:55:59,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 20:55:59,048 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:55:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:55:59,049 INFO L85 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2022-03-18 20:55:59,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:55:59,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429410323] [2022-03-18 20:55:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:55:59,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:55:59,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:55:59,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134463809] [2022-03-18 20:55:59,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:55:59,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:55:59,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:55:59,058 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:55:59,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 20:55:59,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:55:59,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:55:59,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 20:55:59,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:56:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 20:56:00,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:56:00,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:56:00,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429410323] [2022-03-18 20:56:00,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:56:00,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134463809] [2022-03-18 20:56:00,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134463809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:56:00,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:56:00,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-18 20:56:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748746838] [2022-03-18 20:56:00,198 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:56:00,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 20:56:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:56:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 20:56:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-18 20:56:00,199 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-18 20:56:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:56:00,355 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-03-18 20:56:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 20:56:00,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-03-18 20:56:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:56:00,356 INFO L225 Difference]: With dead ends: 61 [2022-03-18 20:56:00,356 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 20:56:00,356 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-18 20:56:00,357 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:56:00,357 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:56:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 20:56:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-18 20:56:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 20:56:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-03-18 20:56:00,360 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-03-18 20:56:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:56:00,360 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-03-18 20:56:00,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-03-18 20:56:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-03-18 20:56:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-18 20:56:00,361 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:56:00,361 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:56:00,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 20:56:00,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 20:56:00,562 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:56:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:56:00,562 INFO L85 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2022-03-18 20:56:00,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:56:00,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930495991] [2022-03-18 20:56:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:56:00,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:56:00,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:56:00,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527032145] [2022-03-18 20:56:00,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:56:00,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:56:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:56:00,574 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:56:00,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process