/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/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 09:51:49,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 09:51:49,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 09:51:49,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 09:51:49,539 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 [2022-03-17 09:51:49,571 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 09:51:49,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 09:51:49,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-17 09:51:49,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-17 09:51:49,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 09:51:49,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 09:51:49,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 09:51:49,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 09:51:49,574 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 09:51:49,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 09:51:49,575 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 09:51:49,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 09:51:49,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 09:51:49,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 09:51:49,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 09:51:49,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 09:51:49,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 09:51:49,576 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 09:51:49,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 09:51:49,576 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 09:51:49,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 09:51:49,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 09:51:49,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 09:51:49,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 09:51:49,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 09:51:49,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 09:51:49,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 09:51:49,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 09:51:49,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 09:51:49,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 09:51:49,578 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-17 09:51:49,578 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-17 09:51:49,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 09:51:49,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 09:51:49,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 09:51:49,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 09:51:49,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 09:51:49,814 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 09:51:49,814 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 09:51:49,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-03-17 09:51:49,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f290612/384d4137e2494c8cb9a414db003c03fd/FLAGa86fde022 [2022-03-17 09:51:50,230 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 09:51:50,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-03-17 09:51:50,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f290612/384d4137e2494c8cb9a414db003c03fd/FLAGa86fde022 [2022-03-17 09:51:50,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f290612/384d4137e2494c8cb9a414db003c03fd [2022-03-17 09:51:50,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 09:51:50,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-17 09:51:50,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 09:51:50,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 09:51:50,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 09:51:50,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0b6ba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50, skipping insertion in model container [2022-03-17 09:51:50,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 09:51:50,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 09:51:50,419 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-03-17 09:51:50,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 09:51:50,443 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 09:51:50,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-03-17 09:51:50,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 09:51:50,466 INFO L208 MainTranslator]: Completed translation [2022-03-17 09:51:50,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50 WrapperNode [2022-03-17 09:51:50,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 09:51:50,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 09:51:50,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 09:51:50,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 09:51:50,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 09:51:50,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 09:51:50,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 09:51:50,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 09:51:50,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50" (1/1) ... [2022-03-17 09:51:50,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 09:51:50,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:51:50,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 09:51:50,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 09:51:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 09:51:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 09:51:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 09:51:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 09:51:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 09:51:50,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 09:51:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 09:51:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 09:51:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 09:51:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 09:51:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 09:51:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 09:51:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 09:51:50,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 09:51:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 09:51:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 09:51:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 09:51:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 09:51:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 09:51:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 09:51:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 09:51:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 09:51:50,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 09:51:50,620 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 09:51:50,621 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 09:51:50,723 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 09:51:50,728 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 09:51:50,728 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 09:51:50,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:51:50 BoogieIcfgContainer [2022-03-17 09:51:50,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 09:51:50,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 09:51:50,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 09:51:50,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 09:51:50,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:51:50" (1/3) ... [2022-03-17 09:51:50,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503e7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:51:50, skipping insertion in model container [2022-03-17 09:51:50,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:51:50" (2/3) ... [2022-03-17 09:51:50,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503e7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:51:50, skipping insertion in model container [2022-03-17 09:51:50,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:51:50" (3/3) ... [2022-03-17 09:51:50,749 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2022-03-17 09:51:50,753 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 09:51:50,754 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 09:51:50,806 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 09:51:50,813 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 [2022-03-17 09:51:50,813 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 09:51:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 09:51:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 09:51:50,845 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:51:50,846 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:51:50,846 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:51:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:51:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 1 times [2022-03-17 09:51:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:51:50,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470338574] [2022-03-17 09:51:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:51:50,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:51:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:51,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:51:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:51:51,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:51:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470338574] [2022-03-17 09:51:51,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470338574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 09:51:51,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 09:51:51,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 09:51:51,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236440568] [2022-03-17 09:51:51,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 09:51:51,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 09:51:51,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:51:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 09:51:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 09:51:51,167 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-03-17 09:51:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:51:51,294 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-03-17 09:51:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 09:51:51,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-03-17 09:51:51,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:51:51,306 INFO L225 Difference]: With dead ends: 62 [2022-03-17 09:51:51,307 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 09:51:51,310 INFO L911 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 [2022-03-17 09:51:51,314 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 09:51:51,315 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 09:51:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 09:51:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-03-17 09:51:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 09:51:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-17 09:51:51,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-03-17 09:51:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:51:51,358 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-17 09:51:51,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-03-17 09:51:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-17 09:51:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 09:51:51,360 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:51:51,361 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:51:51,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 09:51:51,362 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:51:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:51:51,364 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 1 times [2022-03-17 09:51:51,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:51:51,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675942339] [2022-03-17 09:51:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:51:51,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:51:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:51,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:51:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:51,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 09:51:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:51:51,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:51:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675942339] [2022-03-17 09:51:51,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675942339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:51:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024343113] [2022-03-17 09:51:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:51:51,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:51:51,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:51:51,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 09:51:51,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 09:51:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 09:51:51,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:51:51,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 09:51:51,914 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-17 09:51:51,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-17 09:51:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:51:52,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:51:52,307 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 45 treesize of output 41 [2022-03-17 09:51:52,340 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 09:51:52,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-03-17 09:51:52,464 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-03-17 09:51:52,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 315 [2022-03-17 09:51:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:51:52,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024343113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 09:51:52,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 09:51:52,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-03-17 09:51:52,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438457668] [2022-03-17 09:51:52,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 09:51:52,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 09:51:52,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:51:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 09:51:52,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-17 09:51:52,862 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 09:51:53,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:51:53,244 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-03-17 09:51:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 09:51:53,245 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-03-17 09:51:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:51:53,246 INFO L225 Difference]: With dead ends: 52 [2022-03-17 09:51:53,246 INFO L226 Difference]: Without dead ends: 41 [2022-03-17 09:51:53,246 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-17 09:51:53,247 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 09:51:53,248 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 69 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 264 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-03-17 09:51:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-17 09:51:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-03-17 09:51:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 09:51:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-17 09:51:53,255 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-03-17 09:51:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:51:53,255 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-17 09:51:53,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-17 09:51:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-17 09:51:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 09:51:53,257 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:51:53,257 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:51:53,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 09:51:53,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:51:53,472 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:51:53,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:51:53,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 2 times [2022-03-17 09:51:53,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:51:53,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588080257] [2022-03-17 09:51:53,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:51:53,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:51:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:53,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:51:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:53,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 09:51:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:53,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 09:51:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 09:51:53,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:51:53,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588080257] [2022-03-17 09:51:53,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588080257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:51:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935790104] [2022-03-17 09:51:53,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 09:51:53,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:51:53,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:51:53,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 09:51:53,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 09:51:53,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 09:51:53,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 09:51:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-17 09:51:53,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:51:53,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-17 09:51:54,034 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-17 09:51:54,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-03-17 09:51:54,287 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-17 09:51:54,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-03-17 09:51:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 09:51:54,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:51:56,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935790104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:51:56,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 09:51:56,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-03-17 09:51:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795236289] [2022-03-17 09:51:56,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 09:51:56,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 09:51:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:51:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 09:51:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=471, Unknown=1, NotChecked=0, Total=552 [2022-03-17 09:51:56,754 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 09:51:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:51:57,345 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-03-17 09:51:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 09:51:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-03-17 09:51:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:51:57,348 INFO L225 Difference]: With dead ends: 66 [2022-03-17 09:51:57,348 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 09:51:57,349 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=257, Invalid=1548, Unknown=1, NotChecked=0, Total=1806 [2022-03-17 09:51:57,350 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 09:51:57,350 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 71 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 165 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-03-17 09:51:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 09:51:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-03-17 09:51:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 09:51:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-17 09:51:57,360 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-03-17 09:51:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:51:57,360 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-17 09:51:57,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-17 09:51:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-17 09:51:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 09:51:57,362 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:51:57,362 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:51:57,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 09:51:57,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 09:51:57,586 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:51:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:51:57,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1452373648, now seen corresponding path program 1 times [2022-03-17 09:51:57,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:51:57,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223783929] [2022-03-17 09:51:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:51:57,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:51:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:57,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:51:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:57,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 09:51:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:57,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 09:51:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:57,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 09:51:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:57,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 09:51:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-17 09:51:57,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:51:57,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223783929] [2022-03-17 09:51:57,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223783929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:51:57,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524373193] [2022-03-17 09:51:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:51:57,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:51:57,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:51:57,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 09:51:57,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 09:51:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:51:57,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-17 09:51:57,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:51:57,927 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 0 case distinctions, treesize of input 58 treesize of output 53 [2022-03-17 09:51:57,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-03-17 09:51:57,994 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-03-17 09:51:57,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 100 treesize of output 28 [2022-03-17 09:52:00,735 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-03-17 09:52:00,736 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 56 treesize of output 57 [2022-03-17 09:52:03,824 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-03-17 09:52:03,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-03-17 09:52:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-17 09:52:03,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:52:08,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524373193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:52:08,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 09:52:08,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19] total 22 [2022-03-17 09:52:08,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266722593] [2022-03-17 09:52:08,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 09:52:08,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 09:52:08,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:52:08,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 09:52:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=640, Unknown=4, NotChecked=0, Total=756 [2022-03-17 09:52:08,389 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 22 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-17 09:52:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:52:08,809 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-03-17 09:52:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-17 09:52:08,810 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-03-17 09:52:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:52:08,811 INFO L225 Difference]: With dead ends: 79 [2022-03-17 09:52:08,811 INFO L226 Difference]: Without dead ends: 62 [2022-03-17 09:52:08,812 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=221, Invalid=1415, Unknown=4, NotChecked=0, Total=1640 [2022-03-17 09:52:08,813 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 09:52:08,813 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 184 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 140 Unchecked, 0.1s Time] [2022-03-17 09:52:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-17 09:52:08,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-03-17 09:52:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 09:52:08,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-03-17 09:52:08,824 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-03-17 09:52:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:52:08,825 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-03-17 09:52:08,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-17 09:52:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-03-17 09:52:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-17 09:52:08,826 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:52:08,826 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:52:08,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 09:52:09,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:52:09,040 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:52:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:52:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash 345870625, now seen corresponding path program 2 times [2022-03-17 09:52:09,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:52:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275738886] [2022-03-17 09:52:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:52:09,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:52:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:09,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:52:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:09,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 09:52:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:09,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 09:52:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:09,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 09:52:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:09,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-17 09:52:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:09,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-17 09:52:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:09,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-17 09:52:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 09:52:09,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:52:09,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275738886] [2022-03-17 09:52:09,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275738886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:52:09,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677497989] [2022-03-17 09:52:09,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 09:52:09,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:52:09,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:52:09,187 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 09:52:09,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 09:52:09,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 09:52:09,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 09:52:09,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-17 09:52:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:52:09,374 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 0 case distinctions, treesize of input 58 treesize of output 53 [2022-03-17 09:52:09,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-03-17 09:52:11,572 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-03-17 09:52:11,573 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 56 treesize of output 57 [2022-03-17 09:52:12,957 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-03-17 09:52:12,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-03-17 09:52:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 09:52:13,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:52:18,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677497989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:52:18,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 09:52:18,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20] total 23 [2022-03-17 09:52:18,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122782188] [2022-03-17 09:52:18,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 09:52:18,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-17 09:52:18,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:52:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-17 09:52:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=748, Unknown=7, NotChecked=0, Total=870 [2022-03-17 09:52:18,446 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-17 09:52:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:52:21,400 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-03-17 09:52:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-17 09:52:21,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-03-17 09:52:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:52:21,401 INFO L225 Difference]: With dead ends: 103 [2022-03-17 09:52:21,401 INFO L226 Difference]: Without dead ends: 78 [2022-03-17 09:52:21,402 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=232, Invalid=1652, Unknown=8, NotChecked=0, Total=1892 [2022-03-17 09:52:21,403 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 09:52:21,403 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 128 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 204 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-03-17 09:52:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-17 09:52:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-17 09:52:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 09:52:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-03-17 09:52:21,417 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-03-17 09:52:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:52:21,417 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-03-17 09:52:21,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-17 09:52:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-03-17 09:52:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 09:52:21,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:52:21,420 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:52:21,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-17 09:52:21,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:52:21,634 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:52:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:52:21,634 INFO L85 PathProgramCache]: Analyzing trace with hash 648561106, now seen corresponding path program 3 times [2022-03-17 09:52:21,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:52:21,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374218338] [2022-03-17 09:52:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:52:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:52:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:52:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 09:52:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 09:52:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 09:52:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-17 09:52:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-17 09:52:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-17 09:52:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-17 09:52:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-17 09:52:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-17 09:52:21,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:52:21,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374218338] [2022-03-17 09:52:21,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374218338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:52:21,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102637006] [2022-03-17 09:52:21,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 09:52:21,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:52:21,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:52:21,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 09:52:21,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 09:52:22,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-17 09:52:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 09:52:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-17 09:52:22,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:52:22,512 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 0 case distinctions, treesize of input 58 treesize of output 53 [2022-03-17 09:52:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 09:52:22,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-03-17 09:52:22,859 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 0 case distinctions, treesize of input 104 treesize of output 95 [2022-03-17 09:52:22,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 09:52:22,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 09:52:22,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 09:52:22,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 143 [2022-03-17 09:52:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 09:52:22,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 102 treesize of output 30 [2022-03-17 09:52:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-17 09:52:23,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:52:25,874 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 45 treesize of output 41 [2022-03-17 09:52:25,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-17 09:52:25,886 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 09:52:25,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-03-17 09:52:25,965 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-03-17 09:52:25,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-03-17 09:52:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 09:52:26,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102637006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 09:52:26,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 09:52:26,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-03-17 09:52:26,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234723155] [2022-03-17 09:52:26,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 09:52:26,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-17 09:52:26,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:52:26,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-17 09:52:26,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-03-17 09:52:26,342 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-17 09:52:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:52:31,797 INFO L93 Difference]: Finished difference Result 225 states and 259 transitions. [2022-03-17 09:52:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-17 09:52:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-03-17 09:52:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:52:31,800 INFO L225 Difference]: With dead ends: 225 [2022-03-17 09:52:31,800 INFO L226 Difference]: Without dead ends: 192 [2022-03-17 09:52:31,802 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1053, Invalid=6087, Unknown=0, NotChecked=0, Total=7140 [2022-03-17 09:52:31,803 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 377 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-17 09:52:31,803 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 123 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1561 Invalid, 0 Unknown, 343 Unchecked, 2.1s Time] [2022-03-17 09:52:31,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-17 09:52:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2022-03-17 09:52:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.086021505376344) internal successors, (101), 95 states have internal predecessors, (101), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 09:52:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-03-17 09:52:31,854 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 77 [2022-03-17 09:52:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:52:31,856 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-03-17 09:52:31,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-17 09:52:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-03-17 09:52:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 09:52:31,859 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:52:31,860 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:52:31,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 09:52:32,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:52:32,064 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:52:32,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:52:32,064 INFO L85 PathProgramCache]: Analyzing trace with hash 616668035, now seen corresponding path program 4 times [2022-03-17 09:52:32,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:52:32,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969287448] [2022-03-17 09:52:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:52:32,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:52:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:52:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 09:52:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 09:52:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 09:52:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-17 09:52:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-17 09:52:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-17 09:52:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-17 09:52:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-17 09:52:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-17 09:52:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-03-17 09:52:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-17 09:52:32,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:52:32,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969287448] [2022-03-17 09:52:32,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969287448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:52:32,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959764314] [2022-03-17 09:52:32,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 09:52:32,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:52:32,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:52:32,235 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 09:52:32,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 09:52:32,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 09:52:32,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 09:52:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 09:52:32,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:52:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-17 09:52:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:52:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-17 09:52:33,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959764314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 09:52:33,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 09:52:33,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-17 09:52:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005110249] [2022-03-17 09:52:33,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 09:52:33,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 09:52:33,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:52:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 09:52:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-17 09:52:33,344 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-17 09:52:34,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:52:34,607 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2022-03-17 09:52:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 09:52:34,608 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-03-17 09:52:34,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:52:34,609 INFO L225 Difference]: With dead ends: 211 [2022-03-17 09:52:34,609 INFO L226 Difference]: Without dead ends: 159 [2022-03-17 09:52:34,610 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-03-17 09:52:34,610 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 223 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 09:52:34,610 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 74 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 09:52:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-17 09:52:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-03-17 09:52:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 09:52:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-03-17 09:52:34,634 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-03-17 09:52:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:52:34,634 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-03-17 09:52:34,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-17 09:52:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-03-17 09:52:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-17 09:52:34,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:52:34,639 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:52:34,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-17 09:52:34,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:52:34,840 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:52:34,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:52:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1102839803, now seen corresponding path program 5 times [2022-03-17 09:52:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:52:34,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948149590] [2022-03-17 09:52:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:52:34,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:52:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:52:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 09:52:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 09:52:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 09:52:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-17 09:52:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-17 09:52:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-17 09:52:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-17 09:52:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-17 09:52:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-17 09:52:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-17 09:52:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-17 09:52:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-17 09:52:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-17 09:52:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-17 09:52:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-17 09:52:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-17 09:52:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-03-17 09:52:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:52:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-03-17 09:52:35,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:52:35,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948149590] [2022-03-17 09:52:35,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948149590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:52:35,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718199784] [2022-03-17 09:52:35,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 09:52:35,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:52:35,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:52:35,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 09:52:35,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 09:53:12,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-03-17 09:53:12,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 09:53:12,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-17 09:53:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:53:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-17 09:53:13,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:53:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-03-17 09:53:13,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718199784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 09:53:13,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 09:53:13,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-17 09:53:13,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142491166] [2022-03-17 09:53:13,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 09:53:13,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-17 09:53:13,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:53:13,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-17 09:53:13,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 09:53:13,868 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-17 09:53:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:53:29,309 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2022-03-17 09:53:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-17 09:53:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-03-17 09:53:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:53:29,312 INFO L225 Difference]: With dead ends: 320 [2022-03-17 09:53:29,312 INFO L226 Difference]: Without dead ends: 287 [2022-03-17 09:53:29,313 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-03-17 09:53:29,314 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 555 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 2733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-17 09:53:29,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 138 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 2733 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-17 09:53:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-17 09:53:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-03-17 09:53:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-17 09:53:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-03-17 09:53:29,376 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-03-17 09:53:29,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:53:29,378 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-03-17 09:53:29,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-17 09:53:29,378 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-03-17 09:53:29,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-03-17 09:53:29,381 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:53:29,381 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:53:29,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 09:53:29,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:53:29,593 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:53:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:53:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1415471691, now seen corresponding path program 6 times [2022-03-17 09:53:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:53:29,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360433599] [2022-03-17 09:53:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:53:29,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:53:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:53:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 09:53:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 09:53:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 09:53:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-17 09:53:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-17 09:53:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-17 09:53:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-17 09:53:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-17 09:53:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-17 09:53:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-17 09:53:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-17 09:53:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-17 09:53:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-17 09:53:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-17 09:53:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-17 09:53:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-17 09:53:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-17 09:53:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-17 09:53:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-17 09:53:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-17 09:53:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-17 09:53:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-17 09:53:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-03-17 09:53:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-03-17 09:53:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-03-17 09:53:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-03-17 09:53:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-03-17 09:53:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-03-17 09:53:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-03-17 09:53:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-03-17 09:53:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-03-17 09:53:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-03-17 09:53:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-03-17 09:53:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:53:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-03-17 09:53:30,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:53:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360433599] [2022-03-17 09:53:30,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360433599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:53:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598137526] [2022-03-17 09:53:30,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 09:53:30,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:53:30,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:53:30,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 09:53:30,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process