/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/divbin_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 21:04:40,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 21:04:40,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 21:04:40,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 21:04:40,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 21:04:40,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 21:04:40,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 21:04:40,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 21:04:40,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 21:04:40,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 21:04:40,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 21:04:40,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 21:04:40,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 21:04:40,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 21:04:40,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 21:04:40,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 21:04:40,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 21:04:40,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 21:04:40,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 21:04:40,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 21:04:40,692 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 21:04:40,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 21:04:40,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 21:04:40,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 21:04:40,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 21:04:40,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 21:04:40,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 21:04:40,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 21:04:40,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 21:04:40,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 21:04:40,729 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 21:04:40,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 21:04:40,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 21:04:40,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 21:04:40,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 21:04:40,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 21:04:40,731 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 21:04:40,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 21:04:40,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 21:04:40,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 21:04:40,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 21:04:40,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 21:04:40,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 21:04:40,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 21:04:40,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 21:04:40,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 21:04:40,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 21:04:40,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 21:04:40,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 21:04:40,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:04:40,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 21:04:40,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 21:04:40,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 21:04:40,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 21:04:40,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 21:04:40,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 21:04:40,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 21:04:40,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 21:04:40,735 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 21:04:40,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 21:04:40,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 21:04:40,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 21:04:40,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 21:04:40,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 21:04:40,971 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 21:04:40,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2022-03-17 21:04:41,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563e61163/88038e70e9aa45ff8f86beed94f2fc02/FLAG6ad3845ac [2022-03-17 21:04:41,462 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 21:04:41,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2022-03-17 21:04:41,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563e61163/88038e70e9aa45ff8f86beed94f2fc02/FLAG6ad3845ac [2022-03-17 21:04:41,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/563e61163/88038e70e9aa45ff8f86beed94f2fc02 [2022-03-17 21:04:41,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 21:04:41,856 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 21:04:41,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 21:04:41,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 21:04:41,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 21:04:41,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:04:41" (1/1) ... [2022-03-17 21:04:41,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5649b940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:41, skipping insertion in model container [2022-03-17 21:04:41,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:04:41" (1/1) ... [2022-03-17 21:04:41,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 21:04:41,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 21:04:42,066 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/divbin_unwindbound10.i[950,963] [2022-03-17 21:04:42,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:04:42,096 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 21:04:42,106 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/divbin_unwindbound10.i[950,963] [2022-03-17 21:04:42,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:04:42,122 INFO L208 MainTranslator]: Completed translation [2022-03-17 21:04:42,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42 WrapperNode [2022-03-17 21:04:42,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 21:04:42,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 21:04:42,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 21:04:42,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 21:04:42,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42" (1/1) ... [2022-03-17 21:04:42,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42" (1/1) ... [2022-03-17 21:04:42,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42" (1/1) ... [2022-03-17 21:04:42,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42" (1/1) ... [2022-03-17 21:04:42,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42" (1/1) ... [2022-03-17 21:04:42,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42" (1/1) ... [2022-03-17 21:04:42,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42" (1/1) ... [2022-03-17 21:04:42,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 21:04:42,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 21:04:42,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 21:04:42,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 21:04:42,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42" (1/1) ... [2022-03-17 21:04:42,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:04:42,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:42,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 21:04:42,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 21:04:42,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 21:04:42,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 21:04:42,236 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 21:04:42,236 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 21:04:42,236 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 21:04:42,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 21:04:42,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 21:04:42,237 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 21:04:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 21:04:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 21:04:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 21:04:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 21:04:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 21:04:42,320 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 21:04:42,322 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 21:04:42,461 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 21:04:42,466 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 21:04:42,466 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 21:04:42,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:04:42 BoogieIcfgContainer [2022-03-17 21:04:42,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 21:04:42,468 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 21:04:42,468 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 21:04:42,472 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 21:04:42,475 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:04:42" (1/1) ... [2022-03-17 21:04:42,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:04:42 BasicIcfg [2022-03-17 21:04:42,503 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 21:04:42,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 21:04:42,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 21:04:42,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 21:04:42,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:04:41" (1/4) ... [2022-03-17 21:04:42,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@980c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:04:42, skipping insertion in model container [2022-03-17 21:04:42,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:04:42" (2/4) ... [2022-03-17 21:04:42,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@980c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:04:42, skipping insertion in model container [2022-03-17 21:04:42,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:04:42" (3/4) ... [2022-03-17 21:04:42,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@980c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:04:42, skipping insertion in model container [2022-03-17 21:04:42,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:04:42" (4/4) ... [2022-03-17 21:04:42,526 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.iqvasr [2022-03-17 21:04:42,530 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 21:04:42,531 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 21:04:42,591 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 21:04:42,596 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 [2022-03-17 21:04:42,597 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 21:04:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 21:04:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 21:04:42,624 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:42,625 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:42,625 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:42,630 INFO L85 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2022-03-17 21:04:42,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:42,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354665180] [2022-03-17 21:04:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:42,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:04:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:42,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:04:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:42,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 21:04:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:42,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:04:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354665180] [2022-03-17 21:04:42,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354665180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:04:42,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:04:42,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 21:04:42,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618989397] [2022-03-17 21:04:42,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:04:42,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 21:04:42,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:04:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 21:04:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:04:42,857 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:04:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:04:42,934 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2022-03-17 21:04:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 21:04:42,936 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 21:04:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:04:42,943 INFO L225 Difference]: With dead ends: 60 [2022-03-17 21:04:42,944 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 21:04:42,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:04:42,949 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:04:42,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:04:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 21:04:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-17 21:04:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 21:04:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-03-17 21:04:42,994 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2022-03-17 21:04:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:04:42,994 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-03-17 21:04:42,996 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:04:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-03-17 21:04:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 21:04:42,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:42,999 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:42,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 21:04:42,999 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:43,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2022-03-17 21:04:43,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:43,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433821657] [2022-03-17 21:04:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:43,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:43,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:04:43,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44463102] [2022-03-17 21:04:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:43,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:43,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:04:43,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 21:04:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 21:04:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:04:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:43,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:04:43,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:04:43,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433821657] [2022-03-17 21:04:43,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:04:43,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44463102] [2022-03-17 21:04:43,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44463102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:04:43,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:04:43,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 21:04:43,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669588050] [2022-03-17 21:04:43,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:04:43,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 21:04:43,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:04:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 21:04:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 21:04:43,250 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:04:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:04:43,265 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-03-17 21:04:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 21:04:43,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-17 21:04:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:04:43,267 INFO L225 Difference]: With dead ends: 42 [2022-03-17 21:04:43,267 INFO L226 Difference]: Without dead ends: 30 [2022-03-17 21:04:43,268 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 21:04:43,269 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:04:43,269 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:04:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-17 21:04:43,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-17 21:04:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 21:04:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-03-17 21:04:43,277 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2022-03-17 21:04:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:04:43,278 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-03-17 21:04:43,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:04:43,279 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-03-17 21:04:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 21:04:43,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:43,280 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:43,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 21:04:43,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:43,495 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2022-03-17 21:04:43,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:43,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891368535] [2022-03-17 21:04:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:43,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:04:43,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030580042] [2022-03-17 21:04:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:43,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:43,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:43,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:04:43,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 21:04:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:43,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:04:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:04:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:43,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:04:43,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:04:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891368535] [2022-03-17 21:04:43,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:04:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030580042] [2022-03-17 21:04:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030580042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:04:43,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:04:43,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:04:43,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075658943] [2022-03-17 21:04:43,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:04:43,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:04:43,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:04:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:04:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:04:43,706 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:04:43,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:04:43,734 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-03-17 21:04:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:04:43,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-03-17 21:04:43,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:04:43,736 INFO L225 Difference]: With dead ends: 41 [2022-03-17 21:04:43,736 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 21:04:43,736 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:04:43,738 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:04:43,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:04:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 21:04:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-17 21:04:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 21:04:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-03-17 21:04:43,745 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2022-03-17 21:04:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:04:43,746 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-03-17 21:04:43,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:04:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-03-17 21:04:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 21:04:43,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:43,747 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:43,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 21:04:43,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 21:04:43,968 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:43,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2022-03-17 21:04:43,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:43,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693272058] [2022-03-17 21:04:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:43,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:43,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:04:43,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985576210] [2022-03-17 21:04:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:43,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:43,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:43,992 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:04:43,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 21:04:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 21:04:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:04:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 21:04:44,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:04:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:44,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:04:44,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693272058] [2022-03-17 21:04:44,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:04:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985576210] [2022-03-17 21:04:44,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985576210] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:04:44,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:04:44,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 21:04:44,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897342987] [2022-03-17 21:04:44,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:04:44,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:04:44,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:04:44,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:04:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:04:44,547 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:04:46,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:04:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:04:46,740 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-03-17 21:04:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:04:46,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-03-17 21:04:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:04:46,743 INFO L225 Difference]: With dead ends: 42 [2022-03-17 21:04:46,743 INFO L226 Difference]: Without dead ends: 39 [2022-03-17 21:04:46,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:04:46,744 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:04:46,745 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-17 21:04:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-17 21:04:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-17 21:04:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 21:04:46,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-03-17 21:04:46,751 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2022-03-17 21:04:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:04:46,752 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-03-17 21:04:46,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:04:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-03-17 21:04:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 21:04:46,753 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:46,753 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:46,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 21:04:46,954 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:46,954 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2022-03-17 21:04:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:46,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705466371] [2022-03-17 21:04:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:46,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:04:46,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226182774] [2022-03-17 21:04:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:46,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:46,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:46,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:04:46,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 21:04:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:47,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:04:47,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:04:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:47,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:04:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:47,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:04:47,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705466371] [2022-03-17 21:04:47,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:04:47,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226182774] [2022-03-17 21:04:47,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226182774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:04:47,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:04:47,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-17 21:04:47,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587865513] [2022-03-17 21:04:47,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:04:47,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 21:04:47,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:04:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 21:04:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:04:47,239 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:04:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:04:47,343 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-03-17 21:04:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 21:04:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2022-03-17 21:04:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:04:47,345 INFO L225 Difference]: With dead ends: 73 [2022-03-17 21:04:47,345 INFO L226 Difference]: Without dead ends: 61 [2022-03-17 21:04:47,345 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:04:47,346 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:04:47,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 122 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:04:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-17 21:04:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2022-03-17 21:04:47,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 21:04:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-03-17 21:04:47,354 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 28 [2022-03-17 21:04:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:04:47,354 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-03-17 21:04:47,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:04:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-03-17 21:04:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 21:04:47,355 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:47,355 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:47,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 21:04:47,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:47,573 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:47,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2022-03-17 21:04:47,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:47,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935894568] [2022-03-17 21:04:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:47,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:47,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:04:47,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843972299] [2022-03-17 21:04:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:47,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:47,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:47,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:04:47,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 21:04:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:47,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:04:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:04:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:47,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:04:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:47,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:04:47,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935894568] [2022-03-17 21:04:47,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:04:47,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843972299] [2022-03-17 21:04:47,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843972299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:04:47,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:04:47,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 21:04:47,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636680476] [2022-03-17 21:04:47,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:04:47,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 21:04:47,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:04:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 21:04:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:04:47,856 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:04:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:04:47,998 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2022-03-17 21:04:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 21:04:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-03-17 21:04:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:04:48,001 INFO L225 Difference]: With dead ends: 98 [2022-03-17 21:04:48,001 INFO L226 Difference]: Without dead ends: 91 [2022-03-17 21:04:48,001 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:04:48,002 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 83 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:04:48,002 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 184 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:04:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-17 21:04:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2022-03-17 21:04:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 67 states have internal predecessors, (85), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 21:04:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-03-17 21:04:48,012 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 29 [2022-03-17 21:04:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:04:48,013 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-03-17 21:04:48,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:04:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-03-17 21:04:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 21:04:48,013 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:48,014 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:48,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 21:04:48,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:48,235 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:48,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2022-03-17 21:04:48,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:48,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066551097] [2022-03-17 21:04:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:48,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:48,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:04:48,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231132603] [2022-03-17 21:04:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:48,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:48,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:04:48,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 21:04:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:48,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 21:04:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:04:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 21:04:48,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:04:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:48,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:04:48,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066551097] [2022-03-17 21:04:48,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:04:48,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231132603] [2022-03-17 21:04:48,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231132603] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:04:48,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:04:48,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-17 21:04:48,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722767111] [2022-03-17 21:04:48,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:04:48,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:04:48,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:04:48,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:04:48,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:04:48,849 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:04:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:04:48,887 INFO L93 Difference]: Finished difference Result 117 states and 143 transitions. [2022-03-17 21:04:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:04:48,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-17 21:04:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:04:48,890 INFO L225 Difference]: With dead ends: 117 [2022-03-17 21:04:48,890 INFO L226 Difference]: Without dead ends: 115 [2022-03-17 21:04:48,891 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:04:48,892 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:04:48,892 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 135 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-03-17 21:04:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-17 21:04:48,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-03-17 21:04:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 93 states have internal predecessors, (108), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 21:04:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-03-17 21:04:48,905 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 29 [2022-03-17 21:04:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:04:48,905 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-03-17 21:04:48,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:04:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-03-17 21:04:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 21:04:48,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:48,906 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:48,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 21:04:49,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:49,132 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash -665062919, now seen corresponding path program 1 times [2022-03-17 21:04:49,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:49,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765046616] [2022-03-17 21:04:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:49,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:49,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:04:49,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800139376] [2022-03-17 21:04:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:49,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:49,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:49,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:04:49,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 21:04:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:49,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 21:04:49,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:04:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:04:49,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:04:49,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:04:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765046616] [2022-03-17 21:04:49,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:04:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800139376] [2022-03-17 21:04:49,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800139376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:04:49,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:04:49,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 21:04:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289811115] [2022-03-17 21:04:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:04:49,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 21:04:49,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:04:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 21:04:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:04:49,270 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 21:04:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:04:49,293 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2022-03-17 21:04:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 21:04:49,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-03-17 21:04:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:04:49,295 INFO L225 Difference]: With dead ends: 155 [2022-03-17 21:04:49,295 INFO L226 Difference]: Without dead ends: 100 [2022-03-17 21:04:49,296 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:04:49,296 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:04:49,297 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:04:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-17 21:04:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-17 21:04:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 81 states have internal predecessors, (95), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 21:04:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2022-03-17 21:04:49,308 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 35 [2022-03-17 21:04:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:04:49,308 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2022-03-17 21:04:49,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 21:04:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2022-03-17 21:04:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 21:04:49,309 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:49,309 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:49,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 21:04:49,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:49,529 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1800746756, now seen corresponding path program 1 times [2022-03-17 21:04:49,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:49,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698303775] [2022-03-17 21:04:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:49,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:49,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:04:49,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826570743] [2022-03-17 21:04:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:49,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:49,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:49,548 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:04:49,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 21:04:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:04:49,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 21:04:49,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:04:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 21:04:49,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:04:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 21:04:49,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:04:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698303775] [2022-03-17 21:04:49,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:04:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826570743] [2022-03-17 21:04:49,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826570743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:04:49,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:04:49,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-17 21:04:49,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885243307] [2022-03-17 21:04:49,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:04:49,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 21:04:49,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:04:49,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 21:04:49,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:04:49,823 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 21:04:52,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:04:52,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:04:52,440 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-03-17 21:04:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 21:04:52,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-03-17 21:04:52,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:04:52,441 INFO L225 Difference]: With dead ends: 115 [2022-03-17 21:04:52,442 INFO L226 Difference]: Without dead ends: 95 [2022-03-17 21:04:52,442 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:04:52,443 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-17 21:04:52,443 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 177 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-03-17 21:04:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-17 21:04:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-17 21:04:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 21:04:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-03-17 21:04:52,452 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 35 [2022-03-17 21:04:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:04:52,453 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-03-17 21:04:52,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 21:04:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-03-17 21:04:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 21:04:52,454 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:04:52,454 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:04:52,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-17 21:04:52,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 21:04:52,655 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:04:52,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:04:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1291395213, now seen corresponding path program 1 times [2022-03-17 21:04:52,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:04:52,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088575720] [2022-03-17 21:04:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:52,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:04:52,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:04:52,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823676396] [2022-03-17 21:04:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:04:52,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:04:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:04:52,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:04:52,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process