/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/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 09:11:06,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 09:11:06,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 09:11:06,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 09:11:06,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 09:11:06,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 09:11:06,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 09:11:06,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 09:11:06,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 09:11:06,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 09:11:06,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 09:11:06,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 09:11:06,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 09:11:06,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 09:11:06,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 09:11:06,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 09:11:06,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 09:11:06,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 09:11:06,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 09:11:06,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 09:11:06,151 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 09:11:06,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 09:11:06,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 09:11:06,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 09:11:06,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 09:11:06,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 09:11:06,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 09:11:06,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 09:11:06,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 09:11:06,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 09:11:06,191 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 09:11:06,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 09:11:06,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 09:11:06,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 09:11:06,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 09:11:06,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 09:11:06,192 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 09:11:06,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 09:11:06,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 09:11:06,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 09:11:06,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 09:11:06,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 09:11:06,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:11:06,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 09:11:06,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 09:11:06,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 09:11:06,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 09:11:06,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 09:11:06,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 09:11:06,194 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 09:11:06,194 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 09:11:06,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 09:11:06,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 09:11:06,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 09:11:06,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 09:11:06,384 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 09:11:06,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-04-06 09:11:06,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba265deb/648bfd13e493452b82294df338c090bb/FLAGc743ba4ee [2022-04-06 09:11:06,806 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 09:11:06,806 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-04-06 09:11:06,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba265deb/648bfd13e493452b82294df338c090bb/FLAGc743ba4ee [2022-04-06 09:11:06,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba265deb/648bfd13e493452b82294df338c090bb [2022-04-06 09:11:06,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 09:11:06,823 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 09:11:06,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 09:11:06,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 09:11:06,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 09:11:06,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:06,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f2f914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06, skipping insertion in model container [2022-04-06 09:11:06,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:06,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 09:11:06,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 09:11:06,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-04-06 09:11:06,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:11:06,969 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 09:11:06,978 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-04-06 09:11:06,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:11:06,997 INFO L208 MainTranslator]: Completed translation [2022-04-06 09:11:06,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06 WrapperNode [2022-04-06 09:11:06,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 09:11:07,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 09:11:07,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 09:11:07,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 09:11:07,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:07,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:07,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:07,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:07,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:07,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:07,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:07,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 09:11:07,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 09:11:07,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 09:11:07,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 09:11:07,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06" (1/1) ... [2022-04-06 09:11:07,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:11:07,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:07,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 09:11:07,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 09:11:07,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 09:11:07,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 09:11:07,078 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 09:11:07,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 09:11:07,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 09:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 09:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 09:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 09:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 09:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 09:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 09:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 09:11:07,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 09:11:07,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 09:11:07,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 09:11:07,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 09:11:07,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 09:11:07,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 09:11:07,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 09:11:07,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 09:11:07,121 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 09:11:07,122 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 09:11:07,208 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 09:11:07,213 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 09:11:07,213 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-06 09:11:07,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:11:07 BoogieIcfgContainer [2022-04-06 09:11:07,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 09:11:07,215 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 09:11:07,215 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 09:11:07,216 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 09:11:07,218 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:11:07" (1/1) ... [2022-04-06 09:11:07,219 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 09:11:07,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:11:07 BasicIcfg [2022-04-06 09:11:07,231 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 09:11:07,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 09:11:07,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 09:11:07,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 09:11:07,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:11:06" (1/4) ... [2022-04-06 09:11:07,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc0d42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:11:07, skipping insertion in model container [2022-04-06 09:11:07,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:11:06" (2/4) ... [2022-04-06 09:11:07,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc0d42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:11:07, skipping insertion in model container [2022-04-06 09:11:07,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:11:07" (3/4) ... [2022-04-06 09:11:07,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc0d42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:11:07, skipping insertion in model container [2022-04-06 09:11:07,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:11:07" (4/4) ... [2022-04-06 09:11:07,236 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.cqvasr [2022-04-06 09:11:07,239 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 09:11:07,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 09:11:07,270 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 09:11:07,274 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 09:11:07,274 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 09:11:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:11:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 09:11:07,313 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:07,313 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:07,314 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash -189909079, now seen corresponding path program 1 times [2022-04-06 09:11:07,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:07,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375612139] [2022-04-06 09:11:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:07,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:07,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:07,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:07,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375612139] [2022-04-06 09:11:07,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375612139] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:11:07,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:11:07,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 09:11:07,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130767920] [2022-04-06 09:11:07,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:11:07,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 09:11:07,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:07,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 09:11:07,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:11:07,529 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:07,583 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-04-06 09:11:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 09:11:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 09:11:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:07,588 INFO L225 Difference]: With dead ends: 54 [2022-04-06 09:11:07,589 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 09:11:07,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:11:07,593 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:07,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:11:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 09:11:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 09:11:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:11:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-04-06 09:11:07,629 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-04-06 09:11:07,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:07,630 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-04-06 09:11:07,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:07,630 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-06 09:11:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 09:11:07,630 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:07,631 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:07,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 09:11:07,631 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:07,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1109859861, now seen corresponding path program 1 times [2022-04-06 09:11:07,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:07,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500723454] [2022-04-06 09:11:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:07,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:07,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:07,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:07,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500723454] [2022-04-06 09:11:07,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500723454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:11:07,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:11:07,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 09:11:07,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510101315] [2022-04-06 09:11:07,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:11:07,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 09:11:07,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 09:11:07,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 09:11:07,838 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:07,935 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-04-06 09:11:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 09:11:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 09:11:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:07,938 INFO L225 Difference]: With dead ends: 49 [2022-04-06 09:11:07,938 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 09:11:07,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-06 09:11:07,940 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:07,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:11:07,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 09:11:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 09:11:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:11:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-06 09:11:07,946 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-04-06 09:11:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:07,946 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-06 09:11:07,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-06 09:11:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 09:11:07,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:07,947 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:07,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 09:11:07,947 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1012960919, now seen corresponding path program 1 times [2022-04-06 09:11:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:07,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834017177] [2022-04-06 09:11:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:08,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:08,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834017177] [2022-04-06 09:11:08,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834017177] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:08,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704363310] [2022-04-06 09:11:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:08,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:08,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:08,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:08,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 09:11:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:08,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 09:11:08,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:11:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:11:08,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 09:11:08,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704363310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:11:08,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 09:11:08,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-04-06 09:11:08,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49331272] [2022-04-06 09:11:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:11:08,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 09:11:08,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 09:11:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 09:11:08,303 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:08,350 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-04-06 09:11:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 09:11:08,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 09:11:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:08,352 INFO L225 Difference]: With dead ends: 45 [2022-04-06 09:11:08,352 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 09:11:08,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 09:11:08,355 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:08,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:11:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 09:11:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-04-06 09:11:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:11:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-04-06 09:11:08,359 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2022-04-06 09:11:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:08,359 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-04-06 09:11:08,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-04-06 09:11:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 09:11:08,360 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:08,360 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:08,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 09:11:08,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:08,574 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash -768849603, now seen corresponding path program 1 times [2022-04-06 09:11:08,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:08,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970867147] [2022-04-06 09:11:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:08,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:08,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:11:08,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970867147] [2022-04-06 09:11:08,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970867147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:11:08,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:11:08,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 09:11:08,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611725087] [2022-04-06 09:11:08,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:11:08,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 09:11:08,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:08,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 09:11:08,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 09:11:08,735 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:08,945 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-04-06 09:11:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 09:11:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 09:11:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:08,946 INFO L225 Difference]: With dead ends: 55 [2022-04-06 09:11:08,946 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 09:11:08,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-06 09:11:08,947 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:08,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 40 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:11:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 09:11:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-04-06 09:11:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:11:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-06 09:11:08,955 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-04-06 09:11:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:08,956 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-06 09:11:08,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:08,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-06 09:11:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 09:11:08,957 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:08,957 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:08,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 09:11:08,958 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:08,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1028101756, now seen corresponding path program 1 times [2022-04-06 09:11:08,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:08,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614247441] [2022-04-06 09:11:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:08,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:09,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:09,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:09,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614247441] [2022-04-06 09:11:09,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614247441] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:09,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875998998] [2022-04-06 09:11:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:09,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:09,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:09,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:09,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 09:11:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 09:11:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:11:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:09,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:11:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:09,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875998998] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:11:09,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:11:09,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 09:11:09,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597327194] [2022-04-06 09:11:09,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:11:09,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 09:11:09,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:09,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 09:11:09,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 09:11:09,338 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:09,517 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-04-06 09:11:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 09:11:09,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 09:11:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:09,519 INFO L225 Difference]: With dead ends: 59 [2022-04-06 09:11:09,520 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 09:11:09,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-04-06 09:11:09,523 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:09,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:11:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 09:11:09,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-04-06 09:11:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 09:11:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-04-06 09:11:09,534 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-04-06 09:11:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:09,534 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-04-06 09:11:09,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-04-06 09:11:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 09:11:09,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:09,535 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:11:09,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 09:11:09,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:09,751 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:09,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:09,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1354614778, now seen corresponding path program 2 times [2022-04-06 09:11:09,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:09,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758812662] [2022-04-06 09:11:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:09,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:10,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:10,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:10,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758812662] [2022-04-06 09:11:10,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758812662] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:10,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570369733] [2022-04-06 09:11:10,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:11:10,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:10,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:10,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:10,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 09:11:10,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:11:10,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:11:10,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 09:11:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:11:10,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 09:11:10,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 09:11:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:11:10,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-06 09:11:10,388 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 09:11:10,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 09:11:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:10,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:11:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:11:12,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570369733] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:12,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 09:11:12,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16, 15] total 30 [2022-04-06 09:11:12,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233427695] [2022-04-06 09:11:12,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:11:12,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 09:11:12,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 09:11:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=724, Unknown=1, NotChecked=0, Total=870 [2022-04-06 09:11:12,702 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:12,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:11:12,782 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-04-06 09:11:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 09:11:12,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 09:11:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:11:12,783 INFO L225 Difference]: With dead ends: 49 [2022-04-06 09:11:12,784 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 09:11:12,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=171, Invalid=950, Unknown=1, NotChecked=0, Total=1122 [2022-04-06 09:11:12,785 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:11:12,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 153 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-04-06 09:11:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 09:11:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-04-06 09:11:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 38 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:11:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-04-06 09:11:12,796 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 25 [2022-04-06 09:11:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:11:12,796 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-04-06 09:11:12,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-04-06 09:11:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 09:11:12,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:11:12,797 INFO L499 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, 1, 1] [2022-04-06 09:11:12,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 09:11:13,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:13,012 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:11:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:11:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1272155915, now seen corresponding path program 1 times [2022-04-06 09:11:13,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:11:13,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336658468] [2022-04-06 09:11:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:13,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:11:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:13,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:11:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:11:13,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:11:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336658468] [2022-04-06 09:11:13,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336658468] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:11:13,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351664581] [2022-04-06 09:11:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:11:13,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:11:13,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:11:13,361 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:11:13,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 09:11:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:11:13,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 09:11:13,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:11:13,547 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-06 09:11:13,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-04-06 09:11:13,709 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-04-06 09:11:13,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-04-06 09:11:13,859 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-04-06 09:11:13,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-04-06 09:11:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:11:13,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:11:14,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2022-04-06 09:11:14,185 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-04-06 09:11:14,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 383 treesize of output 347 [2022-04-06 09:11:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:11:15,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351664581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:11:15,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:11:15,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 36 [2022-04-06 09:11:15,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493097132] [2022-04-06 09:11:15,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:11:15,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 09:11:15,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:11:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 09:11:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1124, Unknown=1, NotChecked=0, Total=1260 [2022-04-06 09:11:15,109 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:11:30,287 WARN L232 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 09:11:42,402 WARN L232 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 09:11:57,687 WARN L232 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 33 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 09:12:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:12:08,128 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2022-04-06 09:12:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 09:12:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 09:12:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:12:08,133 INFO L225 Difference]: With dead ends: 147 [2022-04-06 09:12:08,133 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 09:12:08,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2462 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=847, Invalid=7338, Unknown=5, NotChecked=0, Total=8190 [2022-04-06 09:12:08,136 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 145 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:12:08,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 112 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 629 Invalid, 0 Unknown, 503 Unchecked, 0.4s Time] [2022-04-06 09:12:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 09:12:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 62. [2022-04-06 09:12:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 55 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:12:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-04-06 09:12:08,147 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 28 [2022-04-06 09:12:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:12:08,147 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-04-06 09:12:08,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:12:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-04-06 09:12:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 09:12:08,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:12:08,148 INFO L499 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] [2022-04-06 09:12:08,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 09:12:08,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:08,363 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:12:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:12:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash 524795444, now seen corresponding path program 1 times [2022-04-06 09:12:08,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:12:08,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710569766] [2022-04-06 09:12:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:12:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:08,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:12:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:12:08,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:12:08,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710569766] [2022-04-06 09:12:08,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710569766] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:12:08,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506143006] [2022-04-06 09:12:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:08,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:08,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:12:08,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:12:08,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 09:12:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:08,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 09:12:08,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:12:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:12:08,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:12:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:12:08,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506143006] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:12:08,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:12:08,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-04-06 09:12:08,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264351257] [2022-04-06 09:12:08,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:12:08,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 09:12:08,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:12:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 09:12:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-04-06 09:12:08,609 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:12:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:12:08,770 INFO L93 Difference]: Finished difference Result 113 states and 144 transitions. [2022-04-06 09:12:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 09:12:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 09:12:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:12:08,771 INFO L225 Difference]: With dead ends: 113 [2022-04-06 09:12:08,771 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 09:12:08,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-04-06 09:12:08,772 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:12:08,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 50 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:12:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 09:12:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2022-04-06 09:12:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 48 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:12:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-04-06 09:12:08,779 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 28 [2022-04-06 09:12:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:12:08,779 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-04-06 09:12:08,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:12:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-04-06 09:12:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 09:12:08,780 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:12:08,780 INFO L499 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] [2022-04-06 09:12:08,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 09:12:08,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:08,996 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:12:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:12:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash -551964914, now seen corresponding path program 1 times [2022-04-06 09:12:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:12:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878929558] [2022-04-06 09:12:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:12:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:09,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:12:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:12:09,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:12:09,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878929558] [2022-04-06 09:12:09,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878929558] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:12:09,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983631747] [2022-04-06 09:12:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:09,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:09,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:12:09,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:12:09,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 09:12:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:09,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 09:12:09,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:12:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:12:09,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:12:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 09:12:09,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983631747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:12:09,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:12:09,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 09:12:09,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576003691] [2022-04-06 09:12:09,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:12:09,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 09:12:09,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:12:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 09:12:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 09:12:09,202 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:12:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:12:09,397 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2022-04-06 09:12:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 09:12:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 09:12:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:12:09,398 INFO L225 Difference]: With dead ends: 118 [2022-04-06 09:12:09,398 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 09:12:09,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-04-06 09:12:09,399 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:12:09,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 43 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:12:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 09:12:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 57. [2022-04-06 09:12:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 50 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:12:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-04-06 09:12:09,405 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 31 [2022-04-06 09:12:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:12:09,406 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-04-06 09:12:09,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:12:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-04-06 09:12:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 09:12:09,406 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:12:09,406 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:12:09,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 09:12:09,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:09,624 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:12:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:12:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash 567979469, now seen corresponding path program 1 times [2022-04-06 09:12:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:12:09,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81765974] [2022-04-06 09:12:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:09,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:12:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:09,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:12:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:09,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 09:12:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:12:09,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:12:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81765974] [2022-04-06 09:12:09,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81765974] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:12:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664573474] [2022-04-06 09:12:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:09,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:09,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:12:09,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:12:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 09:12:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:09,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 09:12:09,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:12:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:12:09,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:12:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:12:10,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664573474] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:12:10,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:12:10,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-04-06 09:12:10,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212898242] [2022-04-06 09:12:10,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:12:10,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 09:12:10,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:12:10,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 09:12:10,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 09:12:10,049 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:12:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:12:10,301 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2022-04-06 09:12:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 09:12:10,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-06 09:12:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:12:10,302 INFO L225 Difference]: With dead ends: 144 [2022-04-06 09:12:10,302 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 09:12:10,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-04-06 09:12:10,303 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 89 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:12:10,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 69 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:12:10,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 09:12:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2022-04-06 09:12:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:12:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-04-06 09:12:10,310 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 33 [2022-04-06 09:12:10,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:12:10,310 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-04-06 09:12:10,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:12:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-04-06 09:12:10,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 09:12:10,311 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:12:10,311 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:12:10,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 09:12:10,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:10,512 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:12:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:12:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -954574653, now seen corresponding path program 2 times [2022-04-06 09:12:10,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:12:10,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896129281] [2022-04-06 09:12:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:10,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:12:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:10,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:12:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:12:10,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:12:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896129281] [2022-04-06 09:12:10,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896129281] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:12:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155573202] [2022-04-06 09:12:10,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:12:10,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:10,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:12:10,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:12:10,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 09:12:10,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:12:10,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:12:10,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 09:12:10,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:12:11,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:12:11,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-06 09:12:11,076 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 09:12:11,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 09:12:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 09:12:11,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:12:11,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-04-06 09:12:11,257 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-04-06 09:12:11,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-04-06 09:12:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 09:12:11,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155573202] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:12:11,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:12:11,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 32 [2022-04-06 09:12:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910066218] [2022-04-06 09:12:11,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:12:11,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 09:12:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:12:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 09:12:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-04-06 09:12:11,389 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:12:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:12:12,556 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2022-04-06 09:12:12,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 09:12:12,557 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 09:12:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:12:12,563 INFO L225 Difference]: With dead ends: 140 [2022-04-06 09:12:12,563 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 09:12:12,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=786, Invalid=4044, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 09:12:12,573 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 235 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:12:12,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 90 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 778 Invalid, 0 Unknown, 149 Unchecked, 0.5s Time] [2022-04-06 09:12:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 09:12:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 77. [2022-04-06 09:12:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 70 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:12:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-04-06 09:12:12,590 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 36 [2022-04-06 09:12:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:12:12,590 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-04-06 09:12:12,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:12:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-04-06 09:12:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 09:12:12,591 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:12:12,591 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:12:12,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 09:12:12,819 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,SelfDestructingSolverStorable10 [2022-04-06 09:12:12,819 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:12:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:12:12,819 INFO L85 PathProgramCache]: Analyzing trace with hash -392015670, now seen corresponding path program 2 times [2022-04-06 09:12:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:12:12,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275086518] [2022-04-06 09:12:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:12:12,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:12:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:13,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:12:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:12:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 09:12:13,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:12:13,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275086518] [2022-04-06 09:12:13,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275086518] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:12:13,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666396491] [2022-04-06 09:12:13,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:12:13,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:12:13,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:12:13,197 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) [2022-04-06 09:12:13,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 09:12:13,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:12:13,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:12:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 09:12:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:12:13,359 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 09:12:13,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2022-04-06 09:12:13,492 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-04-06 09:12:13,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2022-04-06 09:12:13,633 INFO L356 Elim1Store]: treesize reduction 76, result has 22.4 percent of original size [2022-04-06 09:12:13,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2022-04-06 09:12:13,723 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-04-06 09:12:13,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-04-06 09:12:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 09:12:13,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:12:26,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-04-06 09:12:26,549 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-04-06 09:12:26,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21667 treesize of output 20897 [2022-04-06 09:18:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 11 refuted. 1 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 09:18:59,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666396491] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:18:59,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:18:59,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 46 [2022-04-06 09:18:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604093331] [2022-04-06 09:18:59,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:18:59,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 09:18:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:18:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 09:18:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1833, Unknown=11, NotChecked=0, Total=2070 [2022-04-06 09:18:59,299 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 46 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:19:11,755 WARN L232 SmtUtils]: Spent 11.83s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 09:19:24,932 WARN L232 SmtUtils]: Spent 10.55s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 09:19:42,769 WARN L232 SmtUtils]: Spent 17.49s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 09:19:42,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:19:42,945 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2022-04-06 09:19:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 09:19:42,945 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 09:19:42,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:19:42,946 INFO L225 Difference]: With dead ends: 103 [2022-04-06 09:19:42,946 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 09:19:42,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 65.4s TimeCoverageRelationStatistics Valid=712, Invalid=5439, Unknown=11, NotChecked=0, Total=6162 [2022-04-06 09:19:42,948 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:19:42,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 130 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 724 Invalid, 0 Unknown, 496 Unchecked, 0.4s Time] [2022-04-06 09:19:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 09:19:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2022-04-06 09:19:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 70 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:19:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-04-06 09:19:42,955 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 36 [2022-04-06 09:19:42,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:19:42,956 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-04-06 09:19:42,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:19:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-04-06 09:19:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 09:19:42,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:19:42,956 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:19:42,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 09:19:43,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:19:43,173 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:19:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:19:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1268602014, now seen corresponding path program 2 times [2022-04-06 09:19:43,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:19:43,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074761230] [2022-04-06 09:19:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:19:43,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:19:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:19:43,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:19:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:19:43,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 09:19:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:19:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:19:43,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:19:43,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074761230] [2022-04-06 09:19:43,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074761230] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:19:43,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002146340] [2022-04-06 09:19:43,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:19:43,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:19:43,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:19:43,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:19:43,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 09:19:43,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:19:43,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:19:43,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:19:43,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:19:43,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-04-06 09:19:43,742 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-04-06 09:19:43,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-04-06 09:19:45,781 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ 8 |v_main_~#v~0.offset_BEFORE_CALL_1|))))) is different from true [2022-04-06 09:19:45,860 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-06 09:19:45,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-04-06 09:19:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-04-06 09:19:45,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:19:48,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2022-04-06 09:19:48,277 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-04-06 09:19:48,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1699 treesize of output 1580 [2022-04-06 09:19:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 09:19:49,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002146340] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:19:49,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:19:49,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 32 [2022-04-06 09:19:49,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285884981] [2022-04-06 09:19:49,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:19:49,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 09:19:49,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:19:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 09:19:49,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=829, Unknown=1, NotChecked=58, Total=992 [2022-04-06 09:19:49,078 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 29 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 09:20:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:20:25,261 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2022-04-06 09:20:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 09:20:25,261 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 29 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-04-06 09:20:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:20:25,262 INFO L225 Difference]: With dead ends: 132 [2022-04-06 09:20:25,262 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 09:20:25,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=318, Invalid=2531, Unknown=17, NotChecked=104, Total=2970 [2022-04-06 09:20:25,263 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:20:25,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 170 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 826 Invalid, 0 Unknown, 351 Unchecked, 0.5s Time] [2022-04-06 09:20:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 09:20:25,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2022-04-06 09:20:25,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 101 states have internal predecessors, (120), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:20:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-04-06 09:20:25,286 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 41 [2022-04-06 09:20:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:20:25,287 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-04-06 09:20:25,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 29 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 09:20:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-04-06 09:20:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 09:20:25,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:20:25,288 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:20:25,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 09:20:25,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 09:20:25,505 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:20:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:20:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash -993265584, now seen corresponding path program 3 times [2022-04-06 09:20:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:20:25,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374283469] [2022-04-06 09:20:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:20:25,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:20:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:25,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:20:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 09:20:25,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:20:25,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374283469] [2022-04-06 09:20:25,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374283469] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:20:25,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964816324] [2022-04-06 09:20:25,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:20:25,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:20:25,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:20:25,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:20:25,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 09:20:25,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-06 09:20:25,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:20:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 09:20:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:20:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 09:20:25,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:20:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 09:20:26,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964816324] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:20:26,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:20:26,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2022-04-06 09:20:26,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070032206] [2022-04-06 09:20:26,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:20:26,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 09:20:26,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:20:26,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 09:20:26,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 09:20:26,104 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:20:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:20:26,585 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2022-04-06 09:20:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 09:20:26,585 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 09:20:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:20:26,593 INFO L225 Difference]: With dead ends: 245 [2022-04-06 09:20:26,593 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 09:20:26,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-06 09:20:26,594 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 217 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:20:26,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 76 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:20:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 09:20:26,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 139. [2022-04-06 09:20:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.204724409448819) internal successors, (153), 129 states have internal predecessors, (153), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:20:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2022-04-06 09:20:26,617 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 42 [2022-04-06 09:20:26,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:20:26,617 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2022-04-06 09:20:26,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:20:26,618 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2022-04-06 09:20:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 09:20:26,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:20:26,620 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:20:26,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 09:20:26,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 09:20:26,842 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:20:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:20:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1684170134, now seen corresponding path program 1 times [2022-04-06 09:20:26,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:20:26,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616733492] [2022-04-06 09:20:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:20:26,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:20:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:27,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:20:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:27,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 09:20:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:20:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:20:27,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616733492] [2022-04-06 09:20:27,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616733492] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:20:27,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162651258] [2022-04-06 09:20:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:20:27,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:20:27,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:20:27,129 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:20:27,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 09:20:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 09:20:27,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:20:27,304 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-06 09:20:27,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-04-06 09:20:27,511 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-04-06 09:20:27,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-04-06 09:20:39,686 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-06 09:20:39,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2022-04-06 09:20:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 09:20:39,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:20:46,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-04-06 09:20:46,154 INFO L356 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2022-04-06 09:20:46,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 439 treesize of output 405 [2022-04-06 09:20:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 09:20:46,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162651258] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:20:46,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:20:46,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 36 [2022-04-06 09:20:46,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339453860] [2022-04-06 09:20:46,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:20:46,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 09:20:46,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:20:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 09:20:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1110, Unknown=8, NotChecked=0, Total=1260 [2022-04-06 09:20:46,399 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand has 36 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 09:20:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:20:47,610 INFO L93 Difference]: Finished difference Result 201 states and 237 transitions. [2022-04-06 09:20:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 09:20:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2022-04-06 09:20:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:20:47,612 INFO L225 Difference]: With dead ends: 201 [2022-04-06 09:20:47,612 INFO L226 Difference]: Without dead ends: 199 [2022-04-06 09:20:47,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=395, Invalid=3379, Unknown=8, NotChecked=0, Total=3782 [2022-04-06 09:20:47,613 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 131 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:20:47,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 177 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1029 Invalid, 0 Unknown, 362 Unchecked, 0.6s Time] [2022-04-06 09:20:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-06 09:20:47,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 142. [2022-04-06 09:20:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 132 states have internal predecessors, (157), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 09:20:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2022-04-06 09:20:47,644 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 44 [2022-04-06 09:20:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:20:47,645 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2022-04-06 09:20:47,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 09:20:47,645 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2022-04-06 09:20:47,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 09:20:47,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:20:47,646 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:20:47,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 09:20:47,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 09:20:47,859 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:20:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:20:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1656378862, now seen corresponding path program 4 times [2022-04-06 09:20:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:20:47,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712740148] [2022-04-06 09:20:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:20:47,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:20:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:48,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:20:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:20:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:20:48,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:20:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712740148] [2022-04-06 09:20:48,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712740148] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:20:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394941320] [2022-04-06 09:20:48,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:20:48,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:20:48,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:20:48,421 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 09:20:48,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 09:20:48,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:20:48,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:20:48,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 09:20:48,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:20:48,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-04-06 09:20:48,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,682 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 09:20:48,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-04-06 09:20:48,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,747 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 09:20:48,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-04-06 09:20:48,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 09:20:48,793 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 09:20:48,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-04-06 09:20:48,830 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 09:20:48,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 09:20:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 09:20:48,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:20:57,339 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_331 Int) (v_ArrVal_329 Int) (v_ArrVal_327 Int)) (let ((.cse0 (let ((.cse2 (* c_main_~j~0 4))) (let ((.cse1 (+ |c_main_~#v~0.offset| .cse2))) (store (store (store (select |c_#memory_int| |c_main_~#v~0.base|) .cse1 v_ArrVal_327) (+ |c_main_~#v~0.offset| .cse2 4) v_ArrVal_329) .cse1 v_ArrVal_331))))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4))))) is different from false [2022-04-06 09:20:59,368 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_331 Int) (v_ArrVal_329 Int) (v_ArrVal_327 Int)) (let ((.cse0 (let ((.cse2 (* c_main_~j~0 4))) (let ((.cse1 (+ |c_main_~#v~0.offset| .cse2 4))) (store (store (store (select |c_#memory_int| |c_main_~#v~0.base|) .cse1 v_ArrVal_327) (+ |c_main_~#v~0.offset| 8 .cse2) v_ArrVal_329) .cse1 v_ArrVal_331))))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4))))) is different from false [2022-04-06 09:21:03,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2022-04-06 09:21:03,605 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-04-06 09:21:03,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 363249 treesize of output 357119 [2022-04-06 09:21:16,153 WARN L232 SmtUtils]: Spent 12.53s on a formula simplification. DAG size of input: 405 DAG size of output: 392 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 09:21:23,475 WARN L232 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 380 DAG size of output: 380 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 09:21:31,539 WARN L232 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 378 DAG size of output: 378 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 09:21:50,906 WARN L232 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 376 DAG size of output: 376 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 09:22:05,592 WARN L232 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 370 DAG size of output: 370 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)