/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 21:59:46,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 21:59:46,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 21:59:46,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 21:59:46,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 21:59:46,397 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 21:59:46,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 21:59:46,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 21:59:46,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 21:59:46,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 21:59:46,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 21:59:46,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 21:59:46,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 21:59:46,398 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 21:59:46,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 21:59:46,399 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 21:59:46,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 21:59:46,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 21:59:46,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 21:59:46,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 21:59:46,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 21:59:46,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 21:59:46,399 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 21:59:46,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 21:59:46,400 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 21:59:46,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 21:59:46,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 21:59:46,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 21:59:46,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 21:59:46,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 21:59:46,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 21:59:46,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 21:59:46,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 21:59:46,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 21:59:46,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 21:59:46,401 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 21:59:46,401 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 21:59:46,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 21:59:46,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 21:59:46,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 21:59:46,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 21:59:46,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 21:59:46,596 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 21:59:46,596 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 21:59:46,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-03-19 21:59:46,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44db8f269/b25db34eeaac4702ab5508b4e05b6934/FLAGc4f6d25d3 [2022-03-19 21:59:46,986 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 21:59:46,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-03-19 21:59:46,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44db8f269/b25db34eeaac4702ab5508b4e05b6934/FLAGc4f6d25d3 [2022-03-19 21:59:47,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44db8f269/b25db34eeaac4702ab5508b4e05b6934 [2022-03-19 21:59:47,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 21:59:47,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 21:59:47,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 21:59:47,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 21:59:47,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 21:59:47,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a104a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47, skipping insertion in model container [2022-03-19 21:59:47,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 21:59:47,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 21:59:47,156 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] [2022-03-19 21:59:47,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 21:59:47,174 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 21:59:47,182 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] [2022-03-19 21:59:47,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 21:59:47,199 INFO L208 MainTranslator]: Completed translation [2022-03-19 21:59:47,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47 WrapperNode [2022-03-19 21:59:47,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 21:59:47,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 21:59:47,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 21:59:47,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 21:59:47,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 21:59:47,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 21:59:47,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 21:59:47,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 21:59:47,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47" (1/1) ... [2022-03-19 21:59:47,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 21:59:47,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:47,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 21:59:47,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 21:59:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 21:59:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 21:59:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 21:59:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 21:59:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 21:59:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 21:59:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 21:59:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 21:59:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 21:59:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 21:59:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 21:59:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 21:59:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 21:59:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 21:59:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 21:59:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 21:59:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 21:59:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 21:59:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 21:59:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 21:59:47,333 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 21:59:47,334 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 21:59:47,427 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 21:59:47,431 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 21:59:47,431 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-19 21:59:47,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:59:47 BoogieIcfgContainer [2022-03-19 21:59:47,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 21:59:47,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 21:59:47,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 21:59:47,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 21:59:47,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 09:59:47" (1/3) ... [2022-03-19 21:59:47,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1596a472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:59:47, skipping insertion in model container [2022-03-19 21:59:47,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:47" (2/3) ... [2022-03-19 21:59:47,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1596a472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:59:47, skipping insertion in model container [2022-03-19 21:59:47,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:59:47" (3/3) ... [2022-03-19 21:59:47,442 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2022-03-19 21:59:47,445 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 21:59:47,445 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 21:59:47,476 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 21:59:47,481 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 21:59:47,481 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 21:59:47,491 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) [2022-03-19 21:59:47,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 21:59:47,494 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:47,495 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:47,495 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1914549692, now seen corresponding path program 1 times [2022-03-19 21:59:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:47,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858728274] [2022-03-19 21:59:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:47,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:47,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:47,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858728274] [2022-03-19 21:59:47,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858728274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 21:59:47,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 21:59:47,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 21:59:47,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235857908] [2022-03-19 21:59:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 21:59:47,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 21:59:47,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 21:59:47,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 21:59:47,651 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) [2022-03-19 21:59:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:47,689 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-03-19 21:59:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 21:59:47,691 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 [2022-03-19 21:59:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:47,695 INFO L225 Difference]: With dead ends: 54 [2022-03-19 21:59:47,695 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 21:59:47,697 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 [2022-03-19 21:59:47,699 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 [2022-03-19 21:59:47,700 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] [2022-03-19 21:59:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 21:59:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-19 21:59:47,733 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) [2022-03-19 21:59:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-03-19 21:59:47,735 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-03-19 21:59:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:47,735 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-03-19 21:59:47,736 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) [2022-03-19 21:59:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-03-19 21:59:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 21:59:47,742 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:47,742 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:47,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 21:59:47,742 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash 314290466, now seen corresponding path program 1 times [2022-03-19 21:59:47,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:47,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326503217] [2022-03-19 21:59:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:47,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:47,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:47,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:47,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326503217] [2022-03-19 21:59:47,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326503217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 21:59:47,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 21:59:47,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 21:59:47,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883566701] [2022-03-19 21:59:47,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 21:59:47,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 21:59:47,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:47,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 21:59:47,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-19 21:59:47,884 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) [2022-03-19 21:59:48,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:48,000 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-03-19 21:59:48,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 21:59:48,000 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 [2022-03-19 21:59:48,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:48,001 INFO L225 Difference]: With dead ends: 49 [2022-03-19 21:59:48,001 INFO L226 Difference]: Without dead ends: 28 [2022-03-19 21:59:48,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-19 21:59:48,003 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-19 21:59:48,003 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] [2022-03-19 21:59:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-19 21:59:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-19 21:59:48,007 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) [2022-03-19 21:59:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-19 21:59:48,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-03-19 21:59:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:48,008 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-19 21:59:48,008 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) [2022-03-19 21:59:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-19 21:59:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 21:59:48,009 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:48,009 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:48,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 21:59:48,010 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:48,010 INFO L85 PathProgramCache]: Analyzing trace with hash 408725728, now seen corresponding path program 1 times [2022-03-19 21:59:48,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:48,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837765493] [2022-03-19 21:59:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:48,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:48,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837765493] [2022-03-19 21:59:48,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837765493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:48,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900627287] [2022-03-19 21:59:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:48,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:48,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:48,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:48,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 21:59:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 21:59:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 21:59:48,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 21:59:48,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900627287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 21:59:48,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 21:59:48,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-19 21:59:48,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387523416] [2022-03-19 21:59:48,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 21:59:48,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 21:59:48,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:48,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 21:59:48,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 21:59:48,422 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) [2022-03-19 21:59:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:48,488 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-03-19 21:59:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 21:59:48,488 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 [2022-03-19 21:59:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:48,490 INFO L225 Difference]: With dead ends: 45 [2022-03-19 21:59:48,490 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 21:59:48,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-19 21:59:48,495 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:48,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 93 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 21:59:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 21:59:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-03-19 21:59:48,506 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) [2022-03-19 21:59:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-03-19 21:59:48,508 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2022-03-19 21:59:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:48,508 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-03-19 21:59:48,508 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) [2022-03-19 21:59:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-03-19 21:59:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 21:59:48,509 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:48,509 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] [2022-03-19 21:59:48,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 21:59:48,723 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 [2022-03-19 21:59:48,724 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash -924605581, now seen corresponding path program 1 times [2022-03-19 21:59:48,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:48,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230834407] [2022-03-19 21:59:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:48,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:48,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:48,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:48,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230834407] [2022-03-19 21:59:48,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230834407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:48,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320747369] [2022-03-19 21:59:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:48,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:48,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:48,866 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:48,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 21:59:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:48,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 21:59:48,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:49,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 21:59:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:49,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320747369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 21:59:49,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 21:59:49,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-03-19 21:59:49,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559920281] [2022-03-19 21:59:49,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 21:59:49,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 21:59:49,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:49,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 21:59:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-19 21:59:49,134 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-03-19 21:59:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:49,253 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-03-19 21:59:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 21:59:49,254 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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 [2022-03-19 21:59:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:49,254 INFO L225 Difference]: With dead ends: 55 [2022-03-19 21:59:49,254 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 21:59:49,255 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-19 21:59:49,255 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:49,255 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 45 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 21:59:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 21:59:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-03-19 21:59:49,258 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) [2022-03-19 21:59:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-19 21:59:49,259 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-03-19 21:59:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:49,259 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-19 21:59:49,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-03-19 21:59:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-19 21:59:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 21:59:49,260 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:49,260 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] [2022-03-19 21:59:49,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 21:59:49,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 21:59:49,476 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1080556849, now seen corresponding path program 2 times [2022-03-19 21:59:49,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:49,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573691756] [2022-03-19 21:59:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:49,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:49,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:49,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573691756] [2022-03-19 21:59:49,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573691756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239612801] [2022-03-19 21:59:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 21:59:49,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:49,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:49,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:49,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 21:59:49,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 21:59:49,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 21:59:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 21:59:49,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:50,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 21:59:50,036 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 [2022-03-19 21:59:50,086 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 21:59:50,086 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 [2022-03-19 21:59:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 21:59:50,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 21:59:50,232 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 [2022-03-19 21:59:50,246 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-19 21:59:50,246 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 [2022-03-19 21:59:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 21:59:50,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239612801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 21:59:50,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 21:59:50,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 30 [2022-03-19 21:59:50,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240269315] [2022-03-19 21:59:50,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 21:59:50,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 21:59:50,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:50,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 21:59:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-03-19 21:59:50,330 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 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) [2022-03-19 21:59:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:51,133 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2022-03-19 21:59:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-19 21:59:51,133 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 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 25 [2022-03-19 21:59:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:51,135 INFO L225 Difference]: With dead ends: 81 [2022-03-19 21:59:51,135 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 21:59:51,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=2550, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 21:59:51,137 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:51,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 74 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 534 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-03-19 21:59:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 21:59:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2022-03-19 21:59:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 37 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) [2022-03-19 21:59:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-03-19 21:59:51,144 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-03-19 21:59:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:51,145 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-03-19 21:59:51,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 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) [2022-03-19 21:59:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-03-19 21:59:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 21:59:51,145 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:51,145 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] [2022-03-19 21:59:51,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 21:59:51,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:51,359 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:51,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1781621427, now seen corresponding path program 1 times [2022-03-19 21:59:51,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:51,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844497170] [2022-03-19 21:59:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:51,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:51,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 21:59:51,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:51,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844497170] [2022-03-19 21:59:51,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844497170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 21:59:51,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 21:59:51,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 21:59:51,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422818813] [2022-03-19 21:59:51,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 21:59:51,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 21:59:51,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:51,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 21:59:51,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 21:59:51,406 INFO L87 Difference]: Start difference. First operand 44 states and 52 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) [2022-03-19 21:59:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:51,467 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-03-19 21:59:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 21:59:51,468 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 25 [2022-03-19 21:59:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:51,471 INFO L225 Difference]: With dead ends: 88 [2022-03-19 21:59:51,471 INFO L226 Difference]: Without dead ends: 57 [2022-03-19 21:59:51,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-19 21:59:51,473 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:51,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 35 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 21:59:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-19 21:59:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2022-03-19 21:59:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 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) [2022-03-19 21:59:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-03-19 21:59:51,487 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-03-19 21:59:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:51,487 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-03-19 21:59:51,488 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) [2022-03-19 21:59:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-03-19 21:59:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 21:59:51,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:51,489 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] [2022-03-19 21:59:51,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 21:59:51,489 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:51,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1755898038, now seen corresponding path program 1 times [2022-03-19 21:59:51,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:51,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788373352] [2022-03-19 21:59:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:51,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:51,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:51,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:51,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788373352] [2022-03-19 21:59:51,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788373352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:51,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96858378] [2022-03-19 21:59:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:51,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:51,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:51,790 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:51,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 21:59:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:51,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 21:59:51,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:51,929 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-19 21:59:51,930 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 [2022-03-19 21:59:52,111 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-03-19 21:59:52,111 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 [2022-03-19 21:59:52,260 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-03-19 21:59:52,261 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 [2022-03-19 21:59:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 21:59:52,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 21:59:52,553 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 [2022-03-19 21:59:52,561 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-19 21:59:52,562 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 771 treesize of output 711 [2022-03-19 21:59:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 21:59:53,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96858378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 21:59:53,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 21:59:53,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 36 [2022-03-19 21:59:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371251600] [2022-03-19 21:59:53,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 21:59:53,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-19 21:59:53,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-19 21:59:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1123, Unknown=1, NotChecked=0, Total=1260 [2022-03-19 21:59:53,474 INFO L87 Difference]: Start difference. First operand 46 states and 54 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) [2022-03-19 22:00:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:15,775 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-03-19 22:00:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 22:00:15,776 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 [2022-03-19 22:00:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:15,776 INFO L225 Difference]: With dead ends: 131 [2022-03-19 22:00:15,777 INFO L226 Difference]: Without dead ends: 129 [2022-03-19 22:00:15,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=701, Invalid=5774, Unknown=5, NotChecked=0, Total=6480 [2022-03-19 22:00:15,779 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 106 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 666 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:15,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 139 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 532 Invalid, 0 Unknown, 666 Unchecked, 0.3s Time] [2022-03-19 22:00:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-19 22:00:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 69. [2022-03-19 22:00:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.360655737704918) internal successors, (83), 62 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) [2022-03-19 22:00:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2022-03-19 22:00:15,787 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 28 [2022-03-19 22:00:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:15,787 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2022-03-19 22:00:15,788 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) [2022-03-19 22:00:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2022-03-19 22:00:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 22:00:15,788 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:15,789 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:15,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:15,989 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 [2022-03-19 22:00:15,989 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:15,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:15,990 INFO L85 PathProgramCache]: Analyzing trace with hash -990333180, now seen corresponding path program 3 times [2022-03-19 22:00:15,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:15,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535329546] [2022-03-19 22:00:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:15,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:16,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:16,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:16,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535329546] [2022-03-19 22:00:16,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535329546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:16,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554252344] [2022-03-19 22:00:16,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:00:16,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:16,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:16,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:16,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:00:16,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 22:00:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:00:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 22:00:16,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:16,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:16,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554252344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:16,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:16,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-19 22:00:16,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824405737] [2022-03-19 22:00:16,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:16,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 22:00:16,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 22:00:16,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-19 22:00:16,351 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 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) [2022-03-19 22:00:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:16,592 INFO L93 Difference]: Finished difference Result 204 states and 281 transitions. [2022-03-19 22:00:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 22:00:16,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 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 [2022-03-19 22:00:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:16,593 INFO L225 Difference]: With dead ends: 204 [2022-03-19 22:00:16,593 INFO L226 Difference]: Without dead ends: 154 [2022-03-19 22:00:16,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-19 22:00:16,594 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 142 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:16,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 65 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:00:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-19 22:00:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2022-03-19 22:00:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.372093023255814) internal successors, (118), 87 states have internal predecessors, (118), 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) [2022-03-19 22:00:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2022-03-19 22:00:16,604 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 31 [2022-03-19 22:00:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:16,605 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2022-03-19 22:00:16,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 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) [2022-03-19 22:00:16,605 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2022-03-19 22:00:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 22:00:16,605 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:16,606 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:16,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:16,824 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 [2022-03-19 22:00:16,825 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1076522223, now seen corresponding path program 2 times [2022-03-19 22:00:16,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:16,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268188850] [2022-03-19 22:00:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:16,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 22:00:16,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:16,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268188850] [2022-03-19 22:00:16,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268188850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:00:16,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:00:16,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 22:00:16,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769956735] [2022-03-19 22:00:16,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:00:16,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:00:16,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:16,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:00:16,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 22:00:16,856 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-19 22:00:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:16,888 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2022-03-19 22:00:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:00:16,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 31 [2022-03-19 22:00:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:16,889 INFO L225 Difference]: With dead ends: 146 [2022-03-19 22:00:16,889 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 22:00:16,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:00:16,891 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:16,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:00:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 22:00:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2022-03-19 22:00:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 55 states have internal predecessors, (66), 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) [2022-03-19 22:00:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-03-19 22:00:16,898 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 31 [2022-03-19 22:00:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:16,898 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-03-19 22:00:16,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-19 22:00:16,899 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-03-19 22:00:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 22:00:16,899 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:16,899 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] [2022-03-19 22:00:16,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 22:00:16,900 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -405243253, now seen corresponding path program 1 times [2022-03-19 22:00:16,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:16,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380353006] [2022-03-19 22:00:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:16,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:16,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:17,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 22:00:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:00:17,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:17,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380353006] [2022-03-19 22:00:17,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380353006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:17,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096606570] [2022-03-19 22:00:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:17,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:17,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:17,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:17,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 22:00:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:17,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 22:00:17,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:00:17,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:00:17,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096606570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:17,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:17,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-19 22:00:17,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98891550] [2022-03-19 22:00:17,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:17,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 22:00:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 22:00:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 22:00:17,321 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-03-19 22:00:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:17,570 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-03-19 22:00:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 22:00:17,571 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 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 [2022-03-19 22:00:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:17,571 INFO L225 Difference]: With dead ends: 94 [2022-03-19 22:00:17,572 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 22:00:17,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-03-19 22:00:17,572 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:17,572 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 69 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:00:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 22:00:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2022-03-19 22:00:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 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) [2022-03-19 22:00:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-19 22:00:17,578 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 33 [2022-03-19 22:00:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:17,578 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-19 22:00:17,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-03-19 22:00:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-19 22:00:17,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 22:00:17,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:17,579 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:17,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 22:00:17,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:17,780 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1306424002, now seen corresponding path program 4 times [2022-03-19 22:00:17,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:17,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973138447] [2022-03-19 22:00:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:17,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:18,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:18,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:18,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973138447] [2022-03-19 22:00:18,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973138447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:18,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613069253] [2022-03-19 22:00:18,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:00:18,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:18,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:18,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:18,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 22:00:18,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:00:18,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:00:18,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 22:00:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:18,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:18,298 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 [2022-03-19 22:00:18,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:18,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:18,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:18,392 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:18,392 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 [2022-03-19 22:00:18,421 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:18,421 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 [2022-03-19 22:00:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:00:18,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:20,784 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 57 treesize of output 51 [2022-03-19 22:00:20,803 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-03-19 22:00:20,803 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 373 treesize of output 363 [2022-03-19 22:00:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:00:21,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613069253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:21,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:21,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 35 [2022-03-19 22:00:21,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44202650] [2022-03-19 22:00:21,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:21,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 22:00:21,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:21,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 22:00:21,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 22:00:21,374 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 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) [2022-03-19 22:00:30,261 WARN L833 $PredicateComparison]: unable to prove that (and (or (not (<= 0 c_main_~i~0)) (forall ((v_ArrVal_149 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ (* c_main_~i~0 4) |c_main_~#v~0.offset| 4) v_ArrVal_149))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4)))))) (= |c_#NULL.base| |c_old(#NULL.base)|) (let ((.cse1 (select |c_#memory_int| |c_main_~#v~0.base|))) (<= (select .cse1 0) (select .cse1 (+ |c_main_~#v~0.offset| 4)))) (or (forall ((v_ArrVal_149 Int)) (let ((.cse2 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* c_main_~j~0 4)) v_ArrVal_149))) (<= (select .cse2 |c_main_~#v~0.offset|) (select .cse2 (+ |c_main_~#v~0.offset| 4))))) (not (<= 1 c_main_~j~0))) (= |c_main_~#v~0.offset| 0) (or (not (<= 0 c_main_~j~0)) (forall ((v_ArrVal_149 Int)) (let ((.cse3 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* c_main_~j~0 4) 4) v_ArrVal_149))) (<= (select .cse3 |c_main_~#v~0.offset|) (select .cse3 (+ |c_main_~#v~0.offset| 4)))))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (not (= (+ |c_main_~#v~0.offset| (* c_main_~j~0 4)) 0))) is different from false [2022-03-19 22:00:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:36,841 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2022-03-19 22:00:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 22:00:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 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 33 [2022-03-19 22:00:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:36,843 INFO L225 Difference]: With dead ends: 169 [2022-03-19 22:00:36,843 INFO L226 Difference]: Without dead ends: 138 [2022-03-19 22:00:36,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=645, Invalid=4323, Unknown=6, NotChecked=138, Total=5112 [2022-03-19 22:00:36,844 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 162 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:36,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 114 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 478 Invalid, 0 Unknown, 438 Unchecked, 0.3s Time] [2022-03-19 22:00:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-19 22:00:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 73. [2022-03-19 22:00:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 66 states have internal predecessors, (81), 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) [2022-03-19 22:00:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-19 22:00:36,854 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 33 [2022-03-19 22:00:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:36,854 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-19 22:00:36,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 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) [2022-03-19 22:00:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-19 22:00:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 22:00:36,857 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:36,857 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] [2022-03-19 22:00:36,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:37,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:37,074 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash -350564349, now seen corresponding path program 1 times [2022-03-19 22:00:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:37,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612139765] [2022-03-19 22:00:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:37,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:37,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:00:37,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:37,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612139765] [2022-03-19 22:00:37,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612139765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:37,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686361832] [2022-03-19 22:00:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:37,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:37,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:37,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 22:00:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:37,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 22:00:37,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:37,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:37,606 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 [2022-03-19 22:00:37,656 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:37,656 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 [2022-03-19 22:00:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:00:37,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:37,814 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 [2022-03-19 22:00:37,829 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-19 22:00:37,829 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 [2022-03-19 22:00:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:00:37,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686361832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:37,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:37,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 32 [2022-03-19 22:00:37,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500607796] [2022-03-19 22:00:37,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:37,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 22:00:37,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:37,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 22:00:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-19 22:00:37,965 INFO L87 Difference]: Start difference. First operand 73 states and 88 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) [2022-03-19 22:00:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:39,598 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2022-03-19 22:00:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 22:00:39,598 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 [2022-03-19 22:00:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:39,599 INFO L225 Difference]: With dead ends: 172 [2022-03-19 22:00:39,599 INFO L226 Difference]: Without dead ends: 141 [2022-03-19 22:00:39,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=866, Invalid=4390, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 22:00:39,601 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 251 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:39,601 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 100 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 886 Invalid, 0 Unknown, 100 Unchecked, 0.6s Time] [2022-03-19 22:00:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-19 22:00:39,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 78. [2022-03-19 22:00:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 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) [2022-03-19 22:00:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2022-03-19 22:00:39,621 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 36 [2022-03-19 22:00:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:39,621 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2022-03-19 22:00:39,622 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) [2022-03-19 22:00:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2022-03-19 22:00:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 22:00:39,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:39,622 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] [2022-03-19 22:00:39,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:39,835 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,SelfDestructingSolverStorable11 [2022-03-19 22:00:39,836 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:39,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1169352267, now seen corresponding path program 3 times [2022-03-19 22:00:39,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:39,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506251839] [2022-03-19 22:00:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:39,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:40,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:00:40,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506251839] [2022-03-19 22:00:40,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506251839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869502782] [2022-03-19 22:00:40,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:00:40,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:40,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:40,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:40,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 22:00:40,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 22:00:40,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:00:40,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 22:00:40,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:40,425 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-19 22:00:40,425 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 [2022-03-19 22:00:40,590 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-03-19 22:00:40,591 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 [2022-03-19 22:00:40,783 INFO L356 Elim1Store]: treesize reduction 76, result has 22.4 percent of original size [2022-03-19 22:00:40,784 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 [2022-03-19 22:00:40,890 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-03-19 22:00:40,890 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 [2022-03-19 22:00:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:00:40,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:47,619 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 [2022-03-19 22:00:47,644 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-03-19 22:00:47,644 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 5803 treesize of output 5609