/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 13:07:44,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 13:07:44,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 13:07:44,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 13:07:44,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 13:07:44,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 13:07:44,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 13:07:44,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 13:07:44,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 13:07:44,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 13:07:44,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 13:07:44,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 13:07:44,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 13:07:44,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 13:07:44,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 13:07:44,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 13:07:44,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 13:07:44,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 13:07:44,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 13:07:44,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 13:07:44,711 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 13:07:44,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 13:07:44,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 13:07:44,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 13:07:44,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 13:07:44,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 13:07:44,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 13:07:44,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 13:07:44,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 13:07:44,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 13:07:44,744 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 13:07:44,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 13:07:44,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 13:07:44,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 13:07:44,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 13:07:44,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 13:07:44,745 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 13:07:44,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 13:07:44,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 13:07:44,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 13:07:44,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 13:07:44,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 13:07:44,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 13:07:44,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 13:07:44,746 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 13:07:44,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 13:07:44,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 13:07:44,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 13:07:44,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 13:07:44,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:07:44,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 13:07:44,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 13:07:44,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 13:07:44,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 13:07:44,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 13:07:44,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 13:07:44,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 13:07:44,748 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 13:07:44,749 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 13:07:44,749 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 13:07:44,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 13:07:44,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 13:07:44,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 13:07:44,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 13:07:44,966 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 13:07:44,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-04-06 13:07:45,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640f34553/740490d841f342fea0158e253674bc7c/FLAG9879fb791 [2022-04-06 13:07:45,364 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 13:07:45,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-04-06 13:07:45,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640f34553/740490d841f342fea0158e253674bc7c/FLAG9879fb791 [2022-04-06 13:07:45,805 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/640f34553/740490d841f342fea0158e253674bc7c [2022-04-06 13:07:45,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 13:07:45,808 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 13:07:45,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 13:07:45,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 13:07:45,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 13:07:45,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:45,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379b9b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45, skipping insertion in model container [2022-04-06 13:07:45,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:45,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 13:07:45,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 13:07:45,948 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/prodbin-ll_valuebound50.c[537,550] [2022-04-06 13:07:45,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:07:45,963 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 13:07:45,970 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/prodbin-ll_valuebound50.c[537,550] [2022-04-06 13:07:45,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:07:45,980 INFO L208 MainTranslator]: Completed translation [2022-04-06 13:07:45,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45 WrapperNode [2022-04-06 13:07:45,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 13:07:45,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 13:07:45,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 13:07:45,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 13:07:45,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:45,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:45,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:45,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:45,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:45,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:45,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:45,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 13:07:45,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 13:07:45,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 13:07:45,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 13:07:45,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45" (1/1) ... [2022-04-06 13:07:46,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:07:46,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:46,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 13:07:46,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 13:07:46,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 13:07:46,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 13:07:46,041 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 13:07:46,041 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 13:07:46,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 13:07:46,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 13:07:46,041 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 13:07:46,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 13:07:46,082 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 13:07:46,083 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 13:07:46,213 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 13:07:46,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 13:07:46,217 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 13:07:46,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:07:46 BoogieIcfgContainer [2022-04-06 13:07:46,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 13:07:46,219 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 13:07:46,219 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 13:07:46,220 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 13:07:46,224 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:07:46" (1/1) ... [2022-04-06 13:07:46,225 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 13:07:46,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:07:46 BasicIcfg [2022-04-06 13:07:46,248 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 13:07:46,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 13:07:46,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 13:07:46,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 13:07:46,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 01:07:45" (1/4) ... [2022-04-06 13:07:46,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bed42b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:07:46, skipping insertion in model container [2022-04-06 13:07:46,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:07:45" (2/4) ... [2022-04-06 13:07:46,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bed42b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:07:46, skipping insertion in model container [2022-04-06 13:07:46,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:07:46" (3/4) ... [2022-04-06 13:07:46,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bed42b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:07:46, skipping insertion in model container [2022-04-06 13:07:46,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:07:46" (4/4) ... [2022-04-06 13:07:46,255 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.cqvasr [2022-04-06 13:07:46,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 13:07:46,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 13:07:46,297 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 13:07:46,303 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 13:07:46,303 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 13:07:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 13:07:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:07:46,319 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:46,319 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:46,320 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-04-06 13:07:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:46,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140380842] [2022-04-06 13:07:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:46,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:46,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:07:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:46,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 13:07:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:46,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 13:07:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:46,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 13:07:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 13:07:46,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:07:46,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140380842] [2022-04-06 13:07:46,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140380842] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:07:46,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:07:46,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 13:07:46,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501861226] [2022-04-06 13:07:46,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:07:46,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 13:07:46,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:07:46,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 13:07:46,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:07:46,560 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 13:07:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:07:46,605 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-04-06 13:07:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 13:07:46,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 13:07:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:07:46,623 INFO L225 Difference]: With dead ends: 57 [2022-04-06 13:07:46,623 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 13:07:46,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 13:07:46,630 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:07:46,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:07:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 13:07:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 13:07:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 13:07:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-06 13:07:46,659 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-04-06 13:07:46,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:07:46,659 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-06 13:07:46,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 13:07:46,659 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-06 13:07:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:07:46,661 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:46,661 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:46,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 13:07:46,661 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-04-06 13:07:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:46,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003545058] [2022-04-06 13:07:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:46,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:46,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:07:46,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494150662] [2022-04-06 13:07:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:46,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:46,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:46,685 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:07:46,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 13:07:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:46,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 13:07:46,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:07:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 13:07:46,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:07:46,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:07:46,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003545058] [2022-04-06 13:07:46,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:07:46,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494150662] [2022-04-06 13:07:46,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494150662] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:07:46,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:07:46,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 13:07:46,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469653526] [2022-04-06 13:07:46,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:07:46,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 13:07:46,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:07:46,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 13:07:46,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:07:46,874 INFO L87 Difference]: Start difference. First operand 27 states and 31 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 13:07:46,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:07:46,931 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-04-06 13:07:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 13:07:46,932 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-06 13:07:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:07:46,933 INFO L225 Difference]: With dead ends: 39 [2022-04-06 13:07:46,933 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 13:07:46,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 13:07:46,935 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:07:46,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 87 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:07:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 13:07:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-04-06 13:07:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 13:07:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-06 13:07:46,947 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-04-06 13:07:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:07:46,948 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-06 13:07:46,948 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 13:07:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-06 13:07:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 13:07:46,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:46,950 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:46,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 13:07:47,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:47,163 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:47,164 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-04-06 13:07:47,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:47,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150476989] [2022-04-06 13:07:47,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:47,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:47,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:07:47,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845232234] [2022-04-06 13:07:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:47,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:47,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:07:47,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 13:07:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 13:07:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:07:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 13:07:47,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 13:07:47,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:07:47,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150476989] [2022-04-06 13:07:47,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:07:47,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845232234] [2022-04-06 13:07:47,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845232234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:07:47,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:07:47,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 13:07:47,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039088190] [2022-04-06 13:07:47,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:07:47,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 13:07:47,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:07:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 13:07:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 13:07:47,291 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 13:07:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:07:47,353 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-04-06 13:07:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 13:07:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 13:07:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:07:47,355 INFO L225 Difference]: With dead ends: 43 [2022-04-06 13:07:47,355 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 13:07:47,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 13:07:47,359 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:07:47,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:07:47,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 13:07:47,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-04-06 13:07:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 13:07:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-06 13:07:47,373 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-04-06 13:07:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:07:47,374 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-06 13:07:47,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 13:07:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-06 13:07:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 13:07:47,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:07:47,376 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:07:47,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 13:07:47,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 13:07:47,584 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:07:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:07:47,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-04-06 13:07:47,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:07:47,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990847475] [2022-04-06 13:07:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:07:47,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:07:47,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624673570] [2022-04-06 13:07:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:07:47,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:07:47,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:07:47,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:07:47,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 13:07:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:07:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 13:07:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:07:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 13:07:53,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:08:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 13:08:01,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:01,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990847475] [2022-04-06 13:08:01,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:01,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624673570] [2022-04-06 13:08:01,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624673570] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:08:01,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:08:01,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 13:08:01,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015402965] [2022-04-06 13:08:01,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:08:01,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 13:08:01,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:01,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 13:08:01,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-04-06 13:08:01,665 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 13:08:05,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:10,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:10,272 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-04-06 13:08:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 13:08:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-04-06 13:08:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:10,277 INFO L225 Difference]: With dead ends: 52 [2022-04-06 13:08:10,277 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 13:08:10,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=74, Invalid=304, Unknown=2, NotChecked=0, Total=380 [2022-04-06 13:08:10,278 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:10,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 190 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 206 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-04-06 13:08:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 13:08:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-04-06 13:08:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 13:08:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-04-06 13:08:10,283 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 37 [2022-04-06 13:08:10,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:10,283 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-04-06 13:08:10,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 13:08:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-04-06 13:08:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 13:08:10,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:10,284 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:08:10,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 13:08:10,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:10,499 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:10,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:10,500 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-04-06 13:08:10,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:10,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326488271] [2022-04-06 13:08:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:10,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:10,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:10,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791831864] [2022-04-06 13:08:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:10,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:10,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:10,524 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:08:10,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 13:08:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 13:08:10,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:08:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 13:08:11,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:08:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 13:08:12,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:12,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326488271] [2022-04-06 13:08:12,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:12,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791831864] [2022-04-06 13:08:12,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791831864] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:08:12,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:08:12,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-04-06 13:08:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481598260] [2022-04-06 13:08:12,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:08:12,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 13:08:12,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 13:08:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-06 13:08:12,182 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 13:08:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:13,271 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-04-06 13:08:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 13:08:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-04-06 13:08:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:13,272 INFO L225 Difference]: With dead ends: 78 [2022-04-06 13:08:13,272 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 13:08:13,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-04-06 13:08:13,273 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:13,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 125 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 13:08:13,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 13:08:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 13:08:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 13:08:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-04-06 13:08:13,289 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 37 [2022-04-06 13:08:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:13,290 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-04-06 13:08:13,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 13:08:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-04-06 13:08:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 13:08:13,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:13,291 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-04-06 13:08:13,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 13:08:13,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:13,509 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-04-06 13:08:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:13,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154045998] [2022-04-06 13:08:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:13,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:13,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:13,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171548703] [2022-04-06 13:08:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:13,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:13,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:13,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:08:13,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 13:08:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:13,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 13:08:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:08:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 13:08:13,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:08:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 13:08:13,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:13,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154045998] [2022-04-06 13:08:13,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:13,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171548703] [2022-04-06 13:08:13,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171548703] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:08:13,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:08:13,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 13:08:13,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739517411] [2022-04-06 13:08:13,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:08:13,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 13:08:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 13:08:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 13:08:13,769 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 13:08:15,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:17,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:17,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:17,471 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-04-06 13:08:17,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 13:08:17,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-04-06 13:08:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:17,472 INFO L225 Difference]: With dead ends: 77 [2022-04-06 13:08:17,473 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 13:08:17,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 13:08:17,473 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:17,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 13:08:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 13:08:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 13:08:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 13:08:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-04-06 13:08:17,481 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 43 [2022-04-06 13:08:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:17,482 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-04-06 13:08:17,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 13:08:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-04-06 13:08:17,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 13:08:17,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:17,483 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:08:17,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 13:08:17,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:17,685 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:17,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:17,686 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 1 times [2022-04-06 13:08:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:17,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873483198] [2022-04-06 13:08:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:17,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:17,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239944272] [2022-04-06 13:08:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:17,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:17,701 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:08:17,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 13:08:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:08:17,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 13:08:17,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:08:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 13:08:25,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 13:08:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 13:08:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:08:30,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873483198] [2022-04-06 13:08:30,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 13:08:30,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239944272] [2022-04-06 13:08:30,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239944272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 13:08:30,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 13:08:30,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-06 13:08:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400284414] [2022-04-06 13:08:30,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 13:08:30,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 13:08:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:08:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 13:08:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-04-06 13:08:30,329 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 13:08:35,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 13:08:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:08:38,021 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2022-04-06 13:08:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 13:08:38,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2022-04-06 13:08:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:08:38,023 INFO L225 Difference]: With dead ends: 96 [2022-04-06 13:08:38,023 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 13:08:38,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-04-06 13:08:38,023 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 13:08:38,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 229 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 326 Invalid, 0 Unknown, 37 Unchecked, 4.7s Time] [2022-04-06 13:08:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 13:08:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-04-06 13:08:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 66 states have internal predecessors, (70), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 13:08:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2022-04-06 13:08:38,031 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 55 [2022-04-06 13:08:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:08:38,032 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2022-04-06 13:08:38,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-04-06 13:08:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2022-04-06 13:08:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 13:08:38,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:08:38,033 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 13:08:38,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 13:08:38,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:38,240 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:08:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:08:38,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2101955993, now seen corresponding path program 2 times [2022-04-06 13:08:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:08:38,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541958737] [2022-04-06 13:08:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:08:38,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:08:38,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 13:08:38,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058881714] [2022-04-06 13:08:38,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 13:08:38,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 13:08:38,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:08:38,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 13:08:38,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 13:08:38,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 13:08:38,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 13:08:38,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 13:08:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 13:21:16,913 WARN L232 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 13:22:19,440 WARN L855 $PredicateComparison]: unable to prove that (exists ((aux_mod_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80 Int) (aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502 Int) (aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187_104 Int) (v_main_~z~0_BEFORE_CALL_17 Int) (aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_56 Int) (aux_mod_aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68_79 Int) (aux_div_v_main_~b~0_BEFORE_CALL_21_34 Int) (aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187 Int) (aux_mod_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187_104 Int) (aux_div_aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68_79 Int) (aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_56 Int) (v_main_~a~0_BEFORE_CALL_21 Int) (aux_mod_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68 Int) (aux_mod_aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91_102 Int) (aux_mod_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91 Int) (aux_div_aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91_102 Int)) (let ((.cse11 (* aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187_104 4)) (.cse12 (* 2 aux_mod_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187_104))) (let ((.cse5 (* 4 aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_56)) (.cse6 (* aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_56 2)) (.cse1 (* 2 aux_mod_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68)) (.cse2 (* aux_mod_aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68_79 4)) (.cse3 (* aux_div_aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68_79 8)) (.cse7 (* 4 aux_mod_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91)) (.cse8 (* aux_mod_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80 2)) (.cse9 (* aux_mod_aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91_102 8)) (.cse10 (* aux_div_aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91_102 16)) (.cse13 (* aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502 2)) (.cse4 (* aux_div_v_main_~b~0_BEFORE_CALL_21_34 2)) (.cse0 (+ .cse11 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187 .cse12))) (and (< .cse0 (+ 2 .cse1 .cse2 .cse3)) (< aux_mod_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68 2) (< .cse0 (+ .cse4 1)) (< aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_56 2) (not (= aux_mod_aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91_102 1)) (<= 0 aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_56) (<= (+ .cse5 .cse6) .cse0) (<= 0 aux_mod_aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68_79) (< aux_mod_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91 2) (<= 0 aux_mod_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80) (< .cse0 (+ .cse5 2 .cse6)) (not (= aux_mod_aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68_79 1)) (< .cse0 (+ .cse7 .cse8 .cse9 2 .cse10)) (<= 0 aux_mod_aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91_102) (<= 0 (+ .cse11 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187 .cse12 1)) (not (= aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_56 1)) (< aux_mod_aux_div_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91_102 2) (< aux_mod_aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68_79 2) (<= 0 aux_mod_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_68) (< aux_mod_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187_104 2) (<= 0 aux_mod_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187_104) (<= 0 aux_mod_aux_div_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80_91) (<= .cse13 .cse0) (< aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187 2) (<= (+ .cse1 .cse2 .cse3) .cse0) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187) (<= (+ .cse7 .cse8 .cse9 .cse10) .cse0) (< aux_mod_aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_80 2) (not (= aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502 0)) (< .cse0 (+ 2 .cse13)) (<= .cse4 .cse0) (= (+ v_main_~a~0_BEFORE_CALL_21 (* 2 (* (+ (* 2 aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187_104) aux_mod_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187_104) v_main_~a~0_BEFORE_CALL_21)) (* v_main_~a~0_BEFORE_CALL_21 aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187)) (+ v_main_~z~0_BEFORE_CALL_17 (* (* v_main_~z~0_BEFORE_CALL_17 aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187_104) 4))) (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and (not (= (+ (* 16 (* v_main_~z~0_BEFORE_CALL_17 (div (div (div (div .cse0 2) 2) 2) 2))) v_main_~z~0_BEFORE_CALL_17) (+ (* 2 (* v_main_~a~0_BEFORE_CALL_21 aux_div_v_main_~b~0_BEFORE_CALL_21_34)) (* v_main_~a~0_BEFORE_CALL_21 (+ .cse11 (* (- 2) aux_div_v_main_~b~0_BEFORE_CALL_21_34) aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_21_34_99_115_328_502_187 .cse12 1))))) (<= 0 |c___VERIFIER_assert_#in~cond|))))))) is different from true