/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/fermat1-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 19:22:50,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 19:22:50,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 19:22:50,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 19:22:50,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 19:22:50,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 19:22:50,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 19:22:50,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 19:22:50,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 19:22:50,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 19:22:50,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 19:22:50,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 19:22:50,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 19:22:50,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 19:22:50,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 19:22:50,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 19:22:50,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 19:22:50,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 19:22:50,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 19:22:50,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 19:22:50,142 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 19:22:50,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 19:22:50,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 19:22:50,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 19:22:50,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 19:22:50,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 19:22:50,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 19:22:50,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 19:22:50,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 19:22:50,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 19:22:50,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 19:22:50,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 19:22:50,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 19:22:50,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 19:22:50,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 19:22:50,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 19:22:50,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 19:22:50,158 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 19:22:50,167 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 19:22:50,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 19:22:50,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 19:22:50,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 19:22:50,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 19:22:50,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 19:22:50,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 19:22:50,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 19:22:50,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 19:22:50,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 19:22:50,170 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 19:22:50,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 19:22:50,170 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 19:22:50,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 19:22:50,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 19:22:50,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 19:22:50,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 19:22:50,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 19:22:50,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:22:50,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 19:22:50,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 19:22:50,172 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 19:22:50,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 19:22:50,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 19:22:50,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 19:22:50,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 19:22:50,393 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 19:22:50,393 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 19:22:50,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-03-18 19:22:50,446 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52f0f12c/6452f0771b164685b8287cda93b06165/FLAG2674b4cb9 [2022-03-18 19:22:50,798 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 19:22:50,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-03-18 19:22:50,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52f0f12c/6452f0771b164685b8287cda93b06165/FLAG2674b4cb9 [2022-03-18 19:22:50,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e52f0f12c/6452f0771b164685b8287cda93b06165 [2022-03-18 19:22:50,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 19:22:50,812 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 19:22:50,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 19:22:50,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 19:22:50,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 19:22:50,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:22:50" (1/1) ... [2022-03-18 19:22:50,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9a8303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:50, skipping insertion in model container [2022-03-18 19:22:50,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 07:22:50" (1/1) ... [2022-03-18 19:22:50,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 19:22:50,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 19:22:50,958 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/fermat1-ll_unwindbound10.c[535,548] [2022-03-18 19:22:50,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:22:50,988 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 19:22:50,997 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/fermat1-ll_unwindbound10.c[535,548] [2022-03-18 19:22:51,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 19:22:51,011 INFO L208 MainTranslator]: Completed translation [2022-03-18 19:22:51,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51 WrapperNode [2022-03-18 19:22:51,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 19:22:51,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 19:22:51,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 19:22:51,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 19:22:51,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51" (1/1) ... [2022-03-18 19:22:51,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51" (1/1) ... [2022-03-18 19:22:51,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51" (1/1) ... [2022-03-18 19:22:51,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51" (1/1) ... [2022-03-18 19:22:51,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51" (1/1) ... [2022-03-18 19:22:51,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51" (1/1) ... [2022-03-18 19:22:51,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51" (1/1) ... [2022-03-18 19:22:51,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 19:22:51,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 19:22:51,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 19:22:51,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 19:22:51,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51" (1/1) ... [2022-03-18 19:22:51,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 19:22:51,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:51,078 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 19:22:51,083 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 19:22:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 19:22:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 19:22:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 19:22:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 19:22:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 19:22:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 19:22:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 19:22:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 19:22:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 19:22:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 19:22:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 19:22:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 19:22:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 19:22:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 19:22:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 19:22:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 19:22:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 19:22:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 19:22:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 19:22:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 19:22:51,149 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 19:22:51,150 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 19:22:51,291 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 19:22:51,296 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 19:22:51,299 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 19:22:51,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:22:51 BoogieIcfgContainer [2022-03-18 19:22:51,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 19:22:51,301 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 19:22:51,301 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 19:22:51,305 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 19:22:51,307 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:22:51" (1/1) ... [2022-03-18 19:22:51,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:22:51 BasicIcfg [2022-03-18 19:22:51,322 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 19:22:51,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 19:22:51,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 19:22:51,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 19:22:51,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 07:22:50" (1/4) ... [2022-03-18 19:22:51,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61639820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:22:51, skipping insertion in model container [2022-03-18 19:22:51,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 07:22:51" (2/4) ... [2022-03-18 19:22:51,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61639820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 07:22:51, skipping insertion in model container [2022-03-18 19:22:51,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 07:22:51" (3/4) ... [2022-03-18 19:22:51,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61639820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:22:51, skipping insertion in model container [2022-03-18 19:22:51,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 07:22:51" (4/4) ... [2022-03-18 19:22:51,332 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound10.cJordan [2022-03-18 19:22:51,335 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 19:22:51,335 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 19:22:51,370 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 19:22:51,375 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 19:22:51,375 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 19:22:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 19:22:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 19:22:51,399 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:51,400 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 19:22:51,400 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:51,403 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2022-03-18 19:22:51,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:51,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102246786] [2022-03-18 19:22:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:51,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:51,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:51,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79220641] [2022-03-18 19:22:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:51,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:51,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:51,475 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 19:22:51,480 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 19:22:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:51,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-18 19:22:51,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 19:22:51,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:22:51,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102246786] [2022-03-18 19:22:51,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:51,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79220641] [2022-03-18 19:22:51,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79220641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:22:51,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:22:51,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-18 19:22:51,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619699425] [2022-03-18 19:22:51,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:22:51,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-18 19:22:51,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:51,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-18 19:22:51,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-18 19:22:51,643 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 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 19:22:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:22:51,653 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-03-18 19:22:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-18 19:22:51,654 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 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 19:22:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:22:51,658 INFO L225 Difference]: With dead ends: 37 [2022-03-18 19:22:51,658 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 19:22:51,659 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-18 19:22:51,661 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:22:51,662 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:22:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 19:22:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 19:22:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 19:22:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-18 19:22:51,684 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-03-18 19:22:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:22:51,684 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-18 19:22:51,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 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 19:22:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-18 19:22:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 19:22:51,685 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:51,686 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:22:51,702 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 19:22:51,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-18 19:22:51,897 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:51,898 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2022-03-18 19:22:51,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:51,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768480563] [2022-03-18 19:22:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:51,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:51,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:51,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535729438] [2022-03-18 19:22:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:51,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:51,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:51,910 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 19:22:51,911 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 19:22:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 19:22:51,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:52,050 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 19:22:52,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:22:52,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:52,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768480563] [2022-03-18 19:22:52,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535729438] [2022-03-18 19:22:52,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535729438] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:22:52,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:22:52,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 19:22:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375027419] [2022-03-18 19:22:52,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:22:52,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 19:22:52,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 19:22:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 19:22:52,053 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 19:22:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:22:52,071 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-03-18 19:22:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 19:22:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 19:22:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:22:52,073 INFO L225 Difference]: With dead ends: 34 [2022-03-18 19:22:52,074 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 19:22:52,074 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 19:22:52,075 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:22:52,076 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:22:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 19:22:52,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-18 19:22:52,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 19:22:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-18 19:22:52,084 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-03-18 19:22:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:22:52,085 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-18 19:22:52,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 19:22:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-18 19:22:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 19:22:52,086 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:52,086 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:22:52,103 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 19:22:52,295 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,SelfDestructingSolverStorable1 [2022-03-18 19:22:52,296 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2022-03-18 19:22:52,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:52,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995140326] [2022-03-18 19:22:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:52,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:52,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:52,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233062726] [2022-03-18 19:22:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:52,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:52,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:52,306 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 19:22:52,307 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 19:22:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:52,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 19:22:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:53,310 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 19:22:53,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:22:53,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:53,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995140326] [2022-03-18 19:22:53,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233062726] [2022-03-18 19:22:53,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233062726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:22:53,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:22:53,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:22:53,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472187040] [2022-03-18 19:22:53,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:22:53,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:22:53,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:22:53,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:22:53,312 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 19:22:56,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 19:22:56,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:22:56,426 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-03-18 19:22:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:22:56,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 23 [2022-03-18 19:22:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:22:56,427 INFO L225 Difference]: With dead ends: 51 [2022-03-18 19:22:56,427 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 19:22:56,428 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 19:22:56,428 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:22:56,429 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-03-18 19:22:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 19:22:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-18 19:22:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 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 19:22:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-03-18 19:22:56,434 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-03-18 19:22:56,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:22:56,434 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-03-18 19:22:56,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 19:22:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-03-18 19:22:56,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 19:22:56,435 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:56,435 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:22:56,461 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 19:22:56,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:56,643 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:56,644 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2022-03-18 19:22:56,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:56,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346601404] [2022-03-18 19:22:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:56,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:56,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:56,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247573196] [2022-03-18 19:22:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:56,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:56,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:56,654 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 19:22:56,654 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 19:22:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 19:22:56,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:22:56,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:22:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:22:56,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:56,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346601404] [2022-03-18 19:22:56,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:56,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247573196] [2022-03-18 19:22:56,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247573196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:22:56,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:22:56,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 19:22:56,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448761701] [2022-03-18 19:22:56,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:22:56,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 19:22:56,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:56,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 19:22:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:22:56,943 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 19:22:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:22:57,037 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-03-18 19:22:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 19:22:57,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-03-18 19:22:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:22:57,041 INFO L225 Difference]: With dead ends: 55 [2022-03-18 19:22:57,041 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 19:22:57,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-18 19:22:57,044 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:22:57,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 157 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:22:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 19:22:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2022-03-18 19:22:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 19:22:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-18 19:22:57,059 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 29 [2022-03-18 19:22:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:22:57,060 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-18 19:22:57,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 19:22:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-18 19:22:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 19:22:57,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:57,062 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:22:57,084 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 19:22:57,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:57,279 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:57,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:57,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2022-03-18 19:22:57,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:57,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106985874] [2022-03-18 19:22:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:57,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:57,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:57,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082380313] [2022-03-18 19:22:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:57,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:57,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:57,289 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 19:22:57,290 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 19:22:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 19:22:57,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:22:57,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:22:57,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:57,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106985874] [2022-03-18 19:22:57,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:57,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082380313] [2022-03-18 19:22:57,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082380313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:22:57,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:22:57,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 19:22:57,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841816277] [2022-03-18 19:22:57,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:22:57,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 19:22:57,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:57,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 19:22:57,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:22:57,388 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 19:22:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:22:57,407 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-03-18 19:22:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:22:57,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-03-18 19:22:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:22:57,408 INFO L225 Difference]: With dead ends: 44 [2022-03-18 19:22:57,408 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 19:22:57,408 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:22:57,409 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:22:57,409 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:22:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 19:22:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-18 19:22:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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 19:22:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-03-18 19:22:57,412 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 35 [2022-03-18 19:22:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:22:57,412 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-03-18 19:22:57,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 19:22:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-03-18 19:22:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 19:22:57,413 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:57,413 INFO L500 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:22:57,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 19:22:57,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:57,630 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:57,630 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2022-03-18 19:22:57,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:57,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909210628] [2022-03-18 19:22:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:57,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:57,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:57,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638364825] [2022-03-18 19:22:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:57,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:57,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:57,643 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 19:22:57,644 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 19:22:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:57,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 19:22:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:22:57,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:22:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 19:22:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:57,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909210628] [2022-03-18 19:22:57,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:57,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638364825] [2022-03-18 19:22:57,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638364825] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 19:22:57,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 19:22:57,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-03-18 19:22:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800684084] [2022-03-18 19:22:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:22:57,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 19:22:57,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:57,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 19:22:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:22:57,858 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 19:22:57,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:22:57,888 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-03-18 19:22:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 19:22:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-18 19:22:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:22:57,889 INFO L225 Difference]: With dead ends: 53 [2022-03-18 19:22:57,889 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 19:22:57,890 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:22:57,890 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:22:57,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 112 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:22:57,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 19:22:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-18 19:22:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 19:22:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-03-18 19:22:57,893 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 41 [2022-03-18 19:22:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:22:57,893 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-03-18 19:22:57,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 19:22:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-03-18 19:22:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 19:22:57,894 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:57,894 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:22:57,916 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 19:22:58,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:58,111 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2022-03-18 19:22:58,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:58,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109759329] [2022-03-18 19:22:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:58,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:58,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:58,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478411553] [2022-03-18 19:22:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:58,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:58,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:58,125 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 19:22:58,126 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 19:22:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:58,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 19:22:58,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:22:58,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:22:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 19:22:58,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:58,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109759329] [2022-03-18 19:22:58,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:58,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478411553] [2022-03-18 19:22:58,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478411553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:22:58,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:22:58,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 19:22:58,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387774299] [2022-03-18 19:22:58,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:22:58,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 19:22:58,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 19:22:58,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 19:22:58,344 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-18 19:22:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:22:58,441 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2022-03-18 19:22:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 19:22:58,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-03-18 19:22:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:22:58,442 INFO L225 Difference]: With dead ends: 108 [2022-03-18 19:22:58,442 INFO L226 Difference]: Without dead ends: 108 [2022-03-18 19:22:58,442 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:22:58,443 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 81 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:22:58,443 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 224 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:22:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-18 19:22:58,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-03-18 19:22:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 69 states have internal predecessors, (83), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 19:22:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2022-03-18 19:22:58,448 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 43 [2022-03-18 19:22:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:22:58,449 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2022-03-18 19:22:58,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-18 19:22:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2022-03-18 19:22:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 19:22:58,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:58,450 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:22:58,466 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 19:22:58,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:58,663 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2022-03-18 19:22:58,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:58,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815656259] [2022-03-18 19:22:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:58,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:58,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:58,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666790560] [2022-03-18 19:22:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:58,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:58,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:58,688 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 19:22:58,689 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 19:22:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:58,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 19:22:58,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 19:22:58,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 19:22:58,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:58,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815656259] [2022-03-18 19:22:58,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:58,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666790560] [2022-03-18 19:22:58,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666790560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 19:22:58,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 19:22:58,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 19:22:58,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747498472] [2022-03-18 19:22:58,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 19:22:58,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 19:22:58,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 19:22:58,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-18 19:22:58,783 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 19:22:58,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:22:58,802 INFO L93 Difference]: Finished difference Result 119 states and 152 transitions. [2022-03-18 19:22:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 19:22:58,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-03-18 19:22:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:22:58,804 INFO L225 Difference]: With dead ends: 119 [2022-03-18 19:22:58,804 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 19:22:58,804 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-18 19:22:58,804 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 23 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:22:58,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 98 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:22:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 19:22:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-03-18 19:22:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 19:22:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-03-18 19:22:58,810 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 47 [2022-03-18 19:22:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:22:58,811 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-03-18 19:22:58,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-18 19:22:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-03-18 19:22:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 19:22:58,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:58,811 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:22:58,845 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 19:22:59,027 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,SelfDestructingSolverStorable7 [2022-03-18 19:22:59,028 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:59,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:59,028 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2022-03-18 19:22:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:59,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088511814] [2022-03-18 19:22:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:59,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:59,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987521433] [2022-03-18 19:22:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:59,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:59,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:59,036 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 19:22:59,037 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 19:22:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:59,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 19:22:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:22:59,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:22:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 19:22:59,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:59,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088511814] [2022-03-18 19:22:59,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:59,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987521433] [2022-03-18 19:22:59,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987521433] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:22:59,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:22:59,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-18 19:22:59,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694208723] [2022-03-18 19:22:59,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:22:59,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 19:22:59,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 19:22:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-18 19:22:59,272 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-18 19:22:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:22:59,403 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2022-03-18 19:22:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 19:22:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-03-18 19:22:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:22:59,405 INFO L225 Difference]: With dead ends: 172 [2022-03-18 19:22:59,405 INFO L226 Difference]: Without dead ends: 172 [2022-03-18 19:22:59,405 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-03-18 19:22:59,406 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 121 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:22:59,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 205 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:22:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-18 19:22:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-03-18 19:22:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-18 19:22:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2022-03-18 19:22:59,413 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 49 [2022-03-18 19:22:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:22:59,413 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2022-03-18 19:22:59,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-18 19:22:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2022-03-18 19:22:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 19:22:59,414 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:22:59,414 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:22:59,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 19:22:59,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:59,635 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:22:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:22:59,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2022-03-18 19:22:59,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:22:59,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471440845] [2022-03-18 19:22:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:59,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:22:59,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:22:59,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799131055] [2022-03-18 19:22:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:22:59,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:22:59,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:22:59,645 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 19:22:59,667 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 19:22:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:22:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 19:22:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:22:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:22:59,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:22:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 19:22:59,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:22:59,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471440845] [2022-03-18 19:22:59,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:22:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799131055] [2022-03-18 19:22:59,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799131055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:22:59,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:22:59,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 19:22:59,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683314421] [2022-03-18 19:22:59,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:22:59,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 19:22:59,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:22:59,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 19:22:59,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:22:59,909 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-18 19:23:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:23:00,084 INFO L93 Difference]: Finished difference Result 206 states and 267 transitions. [2022-03-18 19:23:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 19:23:00,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-03-18 19:23:00,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:23:00,085 INFO L225 Difference]: With dead ends: 206 [2022-03-18 19:23:00,085 INFO L226 Difference]: Without dead ends: 206 [2022-03-18 19:23:00,086 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-03-18 19:23:00,086 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 204 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:23:00,086 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 245 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:23:00,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-18 19:23:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2022-03-18 19:23:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 149 states have internal predecessors, (179), 40 states have call successors, (40), 14 states have call predecessors, (40), 12 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-18 19:23:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 257 transitions. [2022-03-18 19:23:00,093 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 257 transitions. Word has length 55 [2022-03-18 19:23:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:23:00,094 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 257 transitions. [2022-03-18 19:23:00,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-18 19:23:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 257 transitions. [2022-03-18 19:23:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 19:23:00,095 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:23:00,095 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:23:00,137 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 19:23:00,327 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,SelfDestructingSolverStorable9 [2022-03-18 19:23:00,327 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:23:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:23:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash -725338187, now seen corresponding path program 1 times [2022-03-18 19:23:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:23:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547467437] [2022-03-18 19:23:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:23:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:23:00,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:23:00,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125145419] [2022-03-18 19:23:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:23:00,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:23:00,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:23:00,335 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 19:23:00,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 19:23:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:23:00,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 19:23:00,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:23:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-18 19:23:00,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:23:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-03-18 19:23:00,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:23:00,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547467437] [2022-03-18 19:23:00,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:23:00,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125145419] [2022-03-18 19:23:00,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125145419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:23:00,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:23:00,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-03-18 19:23:00,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705981633] [2022-03-18 19:23:00,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:23:00,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 19:23:00,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:23:00,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 19:23:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 19:23:00,597 INFO L87 Difference]: Start difference. First operand 198 states and 257 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 19:23:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:23:00,620 INFO L93 Difference]: Finished difference Result 381 states and 522 transitions. [2022-03-18 19:23:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 19:23:00,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-03-18 19:23:00,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:23:00,622 INFO L225 Difference]: With dead ends: 381 [2022-03-18 19:23:00,622 INFO L226 Difference]: Without dead ends: 359 [2022-03-18 19:23:00,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 19:23:00,623 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 19:23:00,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 162 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 19:23:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-18 19:23:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2022-03-18 19:23:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 255 states have (on average 1.2666666666666666) internal successors, (323), 261 states have internal predecessors, (323), 74 states have call successors, (74), 14 states have call predecessors, (74), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-18 19:23:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 469 transitions. [2022-03-18 19:23:00,633 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 469 transitions. Word has length 91 [2022-03-18 19:23:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:23:00,633 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 469 transitions. [2022-03-18 19:23:00,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 19:23:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 469 transitions. [2022-03-18 19:23:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 19:23:00,635 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:23:00,635 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:23:00,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 19:23:00,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 19:23:00,863 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:23:00,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:23:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1986043633, now seen corresponding path program 2 times [2022-03-18 19:23:00,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:23:00,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989991423] [2022-03-18 19:23:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:23:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:23:00,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:23:00,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652420108] [2022-03-18 19:23:00,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 19:23:00,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:23:00,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:23:00,872 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:23:00,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 19:23:00,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 19:23:00,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 19:23:00,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 19:23:00,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:23:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 19:23:01,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:23:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-18 19:23:01,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:23:01,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989991423] [2022-03-18 19:23:01,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:23:01,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652420108] [2022-03-18 19:23:01,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652420108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:23:01,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:23:01,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-03-18 19:23:01,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405244221] [2022-03-18 19:23:01,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:23:01,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 19:23:01,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:23:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 19:23:01,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 19:23:01,254 INFO L87 Difference]: Start difference. First operand 342 states and 469 transitions. Second operand has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 12 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2022-03-18 19:23:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:23:01,431 INFO L93 Difference]: Finished difference Result 352 states and 468 transitions. [2022-03-18 19:23:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 19:23:01,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 12 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) Word has length 91 [2022-03-18 19:23:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:23:01,433 INFO L225 Difference]: With dead ends: 352 [2022-03-18 19:23:01,433 INFO L226 Difference]: Without dead ends: 352 [2022-03-18 19:23:01,433 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-03-18 19:23:01,433 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 123 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:23:01,434 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 259 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:23:01,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-18 19:23:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2022-03-18 19:23:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 263 states have (on average 1.2243346007604563) internal successors, (322), 263 states have internal predecessors, (322), 72 states have call successors, (72), 14 states have call predecessors, (72), 12 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-18 19:23:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 464 transitions. [2022-03-18 19:23:01,441 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 464 transitions. Word has length 91 [2022-03-18 19:23:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:23:01,442 INFO L478 AbstractCegarLoop]: Abstraction has 348 states and 464 transitions. [2022-03-18 19:23:01,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.785714285714286) internal successors, (95), 14 states have internal predecessors, (95), 12 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2022-03-18 19:23:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 464 transitions. [2022-03-18 19:23:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 19:23:01,444 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:23:01,444 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:23:01,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 19:23:01,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 19:23:01,660 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:23:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:23:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 1 times [2022-03-18 19:23:01,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:23:01,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510597119] [2022-03-18 19:23:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:23:01,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:23:01,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:23:01,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140166873] [2022-03-18 19:23:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:23:01,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:23:01,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:23:01,669 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:23:01,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 19:23:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 19:23:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 19:23:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 19:23:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 19:23:01,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 19:23:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 19:23:02,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 19:23:02,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510597119] [2022-03-18 19:23:02,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 19:23:02,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140166873] [2022-03-18 19:23:02,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140166873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 19:23:02,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 19:23:02,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-03-18 19:23:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98537760] [2022-03-18 19:23:02,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 19:23:02,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 19:23:02,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 19:23:02,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 19:23:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-18 19:23:02,102 INFO L87 Difference]: Start difference. First operand 348 states and 464 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 12 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-03-18 19:23:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 19:23:02,269 INFO L93 Difference]: Finished difference Result 350 states and 461 transitions. [2022-03-18 19:23:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 19:23:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 12 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) Word has length 97 [2022-03-18 19:23:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 19:23:02,271 INFO L225 Difference]: With dead ends: 350 [2022-03-18 19:23:02,271 INFO L226 Difference]: Without dead ends: 346 [2022-03-18 19:23:02,271 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-03-18 19:23:02,271 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 132 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 19:23:02,272 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 225 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 19:23:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-03-18 19:23:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-03-18 19:23:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 261 states have (on average 1.1992337164750957) internal successors, (313), 261 states have internal predecessors, (313), 72 states have call successors, (72), 14 states have call predecessors, (72), 12 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-18 19:23:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 455 transitions. [2022-03-18 19:23:02,279 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 455 transitions. Word has length 97 [2022-03-18 19:23:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 19:23:02,279 INFO L478 AbstractCegarLoop]: Abstraction has 346 states and 455 transitions. [2022-03-18 19:23:02,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 12 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-03-18 19:23:02,279 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 455 transitions. [2022-03-18 19:23:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 19:23:02,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 19:23:02,281 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:23:02,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 19:23:02,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 19:23:02,496 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 19:23:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 19:23:02,497 INFO L85 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 1 times [2022-03-18 19:23:02,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 19:23:02,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451419225] [2022-03-18 19:23:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:23:02,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 19:23:02,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 19:23:02,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423458772] [2022-03-18 19:23:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 19:23:02,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:23:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 19:23:02,504 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 19:23:02,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 19:23:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 19:23:02,647 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 19:23:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 19:23:02,724 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 19:23:02,724 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 19:23:02,725 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 19:23:02,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 19:23:02,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 19:23:02,933 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 19:23:02,935 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 19:23:02,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 07:23:02 BasicIcfg [2022-03-18 19:23:02,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 19:23:02,962 INFO L158 Benchmark]: Toolchain (without parser) took 12150.11ms. Allocated memory was 179.3MB in the beginning and 221.2MB in the end (delta: 41.9MB). Free memory was 131.6MB in the beginning and 194.2MB in the end (delta: -62.6MB). Peak memory consumption was 99.3MB. Max. memory is 8.0GB. [2022-03-18 19:23:02,962 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory was 147.8MB in the beginning and 147.7MB in the end (delta: 150.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 19:23:02,963 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.92ms. Allocated memory is still 179.3MB. Free memory was 131.5MB in the beginning and 156.7MB in the end (delta: -25.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 19:23:02,963 INFO L158 Benchmark]: Boogie Preprocessor took 26.89ms. Allocated memory is still 179.3MB. Free memory was 156.7MB in the beginning and 155.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 19:23:02,963 INFO L158 Benchmark]: RCFGBuilder took 260.84ms. Allocated memory is still 179.3MB. Free memory was 155.1MB in the beginning and 144.1MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 19:23:02,963 INFO L158 Benchmark]: IcfgTransformer took 20.61ms. Allocated memory is still 179.3MB. Free memory was 143.6MB in the beginning and 142.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 19:23:02,969 INFO L158 Benchmark]: TraceAbstraction took 11639.48ms. Allocated memory was 179.3MB in the beginning and 221.2MB in the end (delta: 41.9MB). Free memory was 142.0MB in the beginning and 194.2MB in the end (delta: -52.1MB). Peak memory consumption was 109.3MB. Max. memory is 8.0GB. [2022-03-18 19:23:02,970 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory was 147.8MB in the beginning and 147.7MB in the end (delta: 150.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.92ms. Allocated memory is still 179.3MB. Free memory was 131.5MB in the beginning and 156.7MB in the end (delta: -25.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.89ms. Allocated memory is still 179.3MB. Free memory was 156.7MB in the beginning and 155.7MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 260.84ms. Allocated memory is still 179.3MB. Free memory was 155.1MB in the beginning and 144.1MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.61ms. Allocated memory is still 179.3MB. Free memory was 143.6MB in the beginning and 142.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 11639.48ms. Allocated memory was 179.3MB in the beginning and 221.2MB in the end (delta: 41.9MB). Free memory was 142.0MB in the beginning and 194.2MB in the end (delta: -52.1MB). Peak memory consumption was 109.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=14, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=7, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=7, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=7, counter=0, R=2, r=-3, u=5, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=1, counter++=0, R=2, r=-3, u=5, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=1, r=-3, R=2, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=1, R=2, r=-3, u=5, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=2, counter++=1, R=2, r=-3, u=5, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=2, R=2, r=-3, u=5, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=7, counter=2, R=2, r=-3, u=5, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=3, counter++=2, R=2, r=-3, u=5, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=3, R=2, r=-3, u=5, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=7, counter=3, r=2, R=2, u=7, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=4, counter++=3, r=2, R=2, u=7, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=4, r=2, R=2, u=7, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=7, counter=4, r=2, R=2, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=5, counter++=4, R=2, r=2, u=7, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=5, R=2, r=2, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=5, R=2, r=2, u=7, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=6, counter++=5, R=2, r=2, u=7, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=6, R=2, r=2, u=7, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=7, counter=6, R=2, r=1, u=7, v=3] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=7, counter++=6, R=2, r=1, u=7, v=3] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=7, R=2, r=1, u=7, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=7, counter=7, R=2, r=-2, u=7, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=8, counter++=7, R=2, r=-2, u=7, v=5] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=8, R=2, r=-2, u=7, v=5] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=7, counter=8, r=-2, R=2, u=7, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=9, counter++=8, r=-2, R=2, u=7, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=9, r=-2, R=2, u=7, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=7, counter=9, r=5, R=2, u=9, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=10, counter++=9, r=5, R=2, u=9, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=10, r=5, R=2, u=9, v=5] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=7, counter=10, R=2, r=5, u=9, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=11, counter++=10, r=5, R=2, u=9, v=5] [L34] COND FALSE !(counter++<10) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.6s, OverallIterations: 14, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 799 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 788 mSDsluCounter, 2080 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1467 mSDsCounter, 453 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 731 IncrementalHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 453 mSolverCounterUnsat, 613 mSDtfsCounter, 731 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1164 GetRequests, 1044 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=348occurred in iteration=12, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 89 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 749 NumberOfCodeBlocks, 749 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1121 ConstructedInterpolants, 0 QuantifiedInterpolants, 2555 SizeOfPredicates, 47 NumberOfNonLiveVariables, 1931 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 21 InterpolantComputations, 6 PerfectInterpolantSequences, 934/1396 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-18 19:23:02,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...