/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-b030c9e [2022-03-19 22:27:54,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:27:54,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:27:54,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 22:27:54,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 22:27:54,580 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:27:54,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:27:54,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:27:54,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:27:54,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:27:54,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:27:54,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:27:54,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:27:54,582 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:27:54,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:27:54,582 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:27:54,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:27:54,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:27:54,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:27:54,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:27:54,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:27:54,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:27:54,583 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:27:54,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:27:54,583 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:27:54,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:27:54,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:27:54,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:27:54,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:27:54,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:27:54,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:27:54,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:27:54,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:27:54,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:27:54,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:27:54,584 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:27:54,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:27:54,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:27:54,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:27:54,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:27:54,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:27:54,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:27:54,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:27:54,850 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:27:54,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-03-19 22:27:54,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3261fe90/ffe0bf91b5d941288642801fca18ac30/FLAG09523309d [2022-03-19 22:27:55,239 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:27:55,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-03-19 22:27:55,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3261fe90/ffe0bf91b5d941288642801fca18ac30/FLAG09523309d [2022-03-19 22:27:55,671 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3261fe90/ffe0bf91b5d941288642801fca18ac30 [2022-03-19 22:27:55,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:27:55,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:27:55,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:27:55,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:27:55,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:27:55,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572ea71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55, skipping insertion in model container [2022-03-19 22:27:55,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:27:55,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:27:55,881 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] [2022-03-19 22:27:55,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:27:55,915 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:27:55,930 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] [2022-03-19 22:27:55,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:27:55,947 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:27:55,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55 WrapperNode [2022-03-19 22:27:55,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:27:55,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:27:55,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:27:55,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:27:55,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:27:55,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:27:55,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:27:55,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:27:55,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55" (1/1) ... [2022-03-19 22:27:55,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:27:56,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:27:56,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 22:27:56,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 22:27:56,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:27:56,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:27:56,087 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:27:56,088 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 22:27:56,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:27:56,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:27:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:27:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:27:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 22:27:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 22:27:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:27:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:27:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 22:27:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:27:56,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 22:27:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:27:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 22:27:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:27:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:27:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:27:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:27:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:27:56,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:27:56,134 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:27:56,135 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:27:56,229 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:27:56,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:27:56,233 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 22:27:56,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:27:56 BoogieIcfgContainer [2022-03-19 22:27:56,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:27:56,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:27:56,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:27:56,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:27:56,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:27:55" (1/3) ... [2022-03-19 22:27:56,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170c7587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:27:56, skipping insertion in model container [2022-03-19 22:27:56,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:27:55" (2/3) ... [2022-03-19 22:27:56,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170c7587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:27:56, skipping insertion in model container [2022-03-19 22:27:56,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:27:56" (3/3) ... [2022-03-19 22:27:56,239 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2022-03-19 22:27:56,242 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:27:56,242 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:27:56,269 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:27:56,273 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 22:27:56,274 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:27:56,284 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) [2022-03-19 22:27:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 22:27:56,287 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:27:56,288 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:27:56,288 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:27:56,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:27:56,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 1 times [2022-03-19 22:27:56,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:27:56,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631022121] [2022-03-19 22:27:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:27:56,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:27:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:56,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:27:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:27:56,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:27:56,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631022121] [2022-03-19 22:27:56,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631022121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:27:56,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:27:56,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 22:27:56,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901838920] [2022-03-19 22:27:56,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:27:56,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:27:56,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:27:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:27:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 22:27:56,463 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) [2022-03-19 22:27:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:27:56,538 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-03-19 22:27:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:27:56,540 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 [2022-03-19 22:27:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:27:56,544 INFO L225 Difference]: With dead ends: 62 [2022-03-19 22:27:56,544 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 22:27:56,548 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:27:56,553 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-03-19 22:27:56,553 INFO L914 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] [2022-03-19 22:27:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 22:27:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-03-19 22:27:56,584 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) [2022-03-19 22:27:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-19 22:27:56,585 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-03-19 22:27:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:27:56,586 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-19 22:27:56,586 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) [2022-03-19 22:27:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-19 22:27:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 22:27:56,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:27:56,587 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:27:56,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:27:56,587 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:27:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:27:56,588 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 1 times [2022-03-19 22:27:56,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:27:56,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169890864] [2022-03-19 22:27:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:27:56,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:27:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:56,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:27:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:56,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:27:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:27:56,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:27:56,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169890864] [2022-03-19 22:27:56,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169890864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:27:56,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769702317] [2022-03-19 22:27:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:27:56,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:27:56,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:27:56,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:27:56,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 22:27:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 22:27:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:27:56,820 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 [2022-03-19 22:27:56,899 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-19 22:27:56,900 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 [2022-03-19 22:27:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:27:57,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:27:57,135 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 [2022-03-19 22:27:57,144 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:27:57,144 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 [2022-03-19 22:27:57,203 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-03-19 22:27:57,203 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 [2022-03-19 22:27:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:27:57,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769702317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:27:57,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:27:57,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-03-19 22:27:57,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910968309] [2022-03-19 22:27:57,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:27:57,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 22:27:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:27:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 22:27:57,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-19 22:27:57,504 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) [2022-03-19 22:27:57,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:27:57,802 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-03-19 22:27:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 22:27:57,802 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 [2022-03-19 22:27:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:27:57,803 INFO L225 Difference]: With dead ends: 52 [2022-03-19 22:27:57,803 INFO L226 Difference]: Without dead ends: 41 [2022-03-19 22:27:57,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-19 22:27:57,804 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-19 22:27:57,805 INFO L914 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] [2022-03-19 22:27:57,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-19 22:27:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-03-19 22:27:57,809 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) [2022-03-19 22:27:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-19 22:27:57,809 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-03-19 22:27:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:27:57,810 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-19 22:27:57,810 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) [2022-03-19 22:27:57,810 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-19 22:27:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 22:27:57,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:27:57,824 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:27:57,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 22:27:58,037 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 [2022-03-19 22:27:58,038 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:27:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:27:58,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 2 times [2022-03-19 22:27:58,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:27:58,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388067882] [2022-03-19 22:27:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:27:58,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:27:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:58,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:27:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:27:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:58,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 22:27:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:27:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:27:58,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:27:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388067882] [2022-03-19 22:27:58,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388067882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:27:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199616673] [2022-03-19 22:27:58,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:27:58,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:27:58,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:27:58,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:27:58,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 22:27:58,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:27:58,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:27:58,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 22:27:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:27:58,306 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 [2022-03-19 22:27:58,510 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-19 22:27:58,510 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 [2022-03-19 22:27:58,682 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-19 22:27:58,682 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 [2022-03-19 22:27:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 22:27:58,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:28:02,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199616673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:28:02,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 22:28:02,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-03-19 22:28:02,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43532554] [2022-03-19 22:28:02,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 22:28:02,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 22:28:02,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:28:02,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 22:28:02,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-03-19 22:28:02,392 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) [2022-03-19 22:28:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:28:02,806 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-03-19 22:28:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 22:28:02,806 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 [2022-03-19 22:28:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:28:02,808 INFO L225 Difference]: With dead ends: 66 [2022-03-19 22:28:02,808 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 22:28:02,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=257, Invalid=1547, Unknown=2, NotChecked=0, Total=1806 [2022-03-19 22:28:02,809 INFO L913 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 [2022-03-19 22:28:02,810 INFO L914 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] [2022-03-19 22:28:02,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 22:28:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-03-19 22:28:02,815 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) [2022-03-19 22:28:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-19 22:28:02,816 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-03-19 22:28:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:28:02,816 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-19 22:28:02,817 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) [2022-03-19 22:28:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-19 22:28:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 22:28:02,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:28:02,818 INFO L499 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] [2022-03-19 22:28:02,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 22:28:03,031 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 [2022-03-19 22:28:03,032 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:28:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:28:03,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1452373648, now seen corresponding path program 1 times [2022-03-19 22:28:03,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:28:03,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994801617] [2022-03-19 22:28:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:28:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:28:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:03,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:28:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:03,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:28:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:03,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 22:28:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:03,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 22:28:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:03,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 22:28:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-19 22:28:03,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:28:03,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994801617] [2022-03-19 22:28:03,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994801617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:28:03,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298343432] [2022-03-19 22:28:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:28:03,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:28:03,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:28:03,188 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:28:03,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:28:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 22:28:03,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:28:03,302 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 [2022-03-19 22:28:03,306 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 [2022-03-19 22:28:03,989 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-03-19 22:28:03,990 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 [2022-03-19 22:28:07,654 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-03-19 22:28:07,654 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 [2022-03-19 22:28:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:28:07,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:28:18,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298343432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:28:18,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 22:28:18,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19] total 22 [2022-03-19 22:28:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211798880] [2022-03-19 22:28:18,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 22:28:18,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 22:28:18,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:28:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 22:28:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=638, Unknown=6, NotChecked=0, Total=756 [2022-03-19 22:28:18,213 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), 17 states have internal predecessors, (48), 8 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 22:28:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:28:18,569 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-03-19 22:28:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 22:28:18,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 6 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 [2022-03-19 22:28:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:28:18,571 INFO L225 Difference]: With dead ends: 79 [2022-03-19 22:28:18,571 INFO L226 Difference]: Without dead ends: 62 [2022-03-19 22:28:18,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=224, Invalid=1410, Unknown=6, NotChecked=0, Total=1640 [2022-03-19 22:28:18,572 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:28:18,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 189 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-03-19 22:28:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-19 22:28:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-03-19 22:28:18,579 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) [2022-03-19 22:28:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-03-19 22:28:18,580 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-03-19 22:28:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:28:18,580 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-03-19 22:28:18,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 22:28:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-03-19 22:28:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 22:28:18,581 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:28:18,581 INFO L499 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] [2022-03-19 22:28:18,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:28:18,798 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 [2022-03-19 22:28:18,798 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:28:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:28:18,799 INFO L85 PathProgramCache]: Analyzing trace with hash 345870625, now seen corresponding path program 2 times [2022-03-19 22:28:18,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:28:18,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388400826] [2022-03-19 22:28:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:28:18,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:28:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:18,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:28:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:18,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:28:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:18,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 22:28:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:18,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 22:28:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:28:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:18,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 22:28:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:18,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:28:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 22:28:18,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:28:18,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388400826] [2022-03-19 22:28:18,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388400826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:28:18,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736854856] [2022-03-19 22:28:18,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:28:18,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:28:18,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:28:18,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:28:18,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:28:18,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:28:18,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:28:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 22:28:18,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:28:19,088 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 [2022-03-19 22:28:19,094 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 [2022-03-19 22:28:19,154 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-03-19 22:28:19,154 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 [2022-03-19 22:28:23,597 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-03-19 22:28:23,598 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 [2022-03-19 22:28:24,841 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-03-19 22:28:24,841 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 [2022-03-19 22:28:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 22:28:24,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:28:30,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736854856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:28:30,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 22:28:30,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20] total 23 [2022-03-19 22:28:30,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493646854] [2022-03-19 22:28:30,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 22:28:30,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 22:28:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:28:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 22:28:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=749, Unknown=7, NotChecked=0, Total=870 [2022-03-19 22:28:30,903 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) [2022-03-19 22:28:33,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:28:33,868 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-03-19 22:28:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 22:28:33,869 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 [2022-03-19 22:28:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:28:33,870 INFO L225 Difference]: With dead ends: 103 [2022-03-19 22:28:33,870 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 22:28:33,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=231, Invalid=1653, Unknown=8, NotChecked=0, Total=1892 [2022-03-19 22:28:33,872 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:28:33,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 133 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 204 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-03-19 22:28:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 22:28:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-19 22:28:33,883 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) [2022-03-19 22:28:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-03-19 22:28:33,884 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-03-19 22:28:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:28:33,884 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-03-19 22:28:33,884 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) [2022-03-19 22:28:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-03-19 22:28:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-19 22:28:33,887 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:28:33,887 INFO L499 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] [2022-03-19 22:28:33,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:28:34,089 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 [2022-03-19 22:28:34,089 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:28:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:28:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash 648561106, now seen corresponding path program 3 times [2022-03-19 22:28:34,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:28:34,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536632782] [2022-03-19 22:28:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:28:34,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:28:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:28:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:28:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 22:28:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 22:28:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:28:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:28:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:28:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-19 22:28:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 22:28:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-03-19 22:28:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:28:34,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536632782] [2022-03-19 22:28:34,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536632782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:28:34,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353611010] [2022-03-19 22:28:34,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:28:34,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:28:34,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:28:34,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:28:34,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:28:34,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-19 22:28:34,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:28:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 22:28:34,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:28:34,821 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 [2022-03-19 22:28:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:28:34,825 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 [2022-03-19 22:28:34,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:28:34,852 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 [2022-03-19 22:28:35,078 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 [2022-03-19 22:28:35,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:28:35,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:28:35,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:28:35,085 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 [2022-03-19 22:28:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-19 22:28:35,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:28:38,056 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 [2022-03-19 22:28:38,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 22:28:38,074 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:28:38,075 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 [2022-03-19 22:28:38,125 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-03-19 22:28:38,125 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 [2022-03-19 22:28:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 22:28:38,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353611010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:28:38,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:28:38,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-03-19 22:28:38,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138545078] [2022-03-19 22:28:38,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:28:38,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 22:28:38,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:28:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 22:28:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-03-19 22:28:38,514 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) [2022-03-19 22:28:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:28:42,978 INFO L93 Difference]: Finished difference Result 225 states and 259 transitions. [2022-03-19 22:28:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 22:28:42,979 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 [2022-03-19 22:28:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:28:42,981 INFO L225 Difference]: With dead ends: 225 [2022-03-19 22:28:42,981 INFO L226 Difference]: Without dead ends: 192 [2022-03-19 22:28:42,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1053, Invalid=6087, Unknown=0, NotChecked=0, Total=7140 [2022-03-19 22:28:42,983 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 377 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-19 22:28:42,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 123 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1561 Invalid, 0 Unknown, 343 Unchecked, 1.8s Time] [2022-03-19 22:28:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-19 22:28:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2022-03-19 22:28:43,006 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) [2022-03-19 22:28:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-03-19 22:28:43,008 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 77 [2022-03-19 22:28:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:28:43,008 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-03-19 22:28:43,008 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) [2022-03-19 22:28:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-03-19 22:28:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 22:28:43,010 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:28:43,010 INFO L499 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] [2022-03-19 22:28:43,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 22:28:43,211 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 [2022-03-19 22:28:43,211 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:28:43,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:28:43,212 INFO L85 PathProgramCache]: Analyzing trace with hash 616668035, now seen corresponding path program 4 times [2022-03-19 22:28:43,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:28:43,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190968349] [2022-03-19 22:28:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:28:43,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:28:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:28:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:28:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 22:28:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 22:28:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:28:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:28:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:28:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-19 22:28:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 22:28:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 22:28:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-03-19 22:28:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 22:28:43,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:28:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190968349] [2022-03-19 22:28:43,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190968349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:28:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167984602] [2022-03-19 22:28:43,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:28:43,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:28:43,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:28:43,421 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:28:43,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 22:28:44,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:28:44,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:28:44,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 22:28:44,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:28:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 22:28:44,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:28:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-19 22:28:44,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167984602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:28:44,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:28:44,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-19 22:28:44,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360153617] [2022-03-19 22:28:44,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:28:44,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 22:28:44,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:28:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 22:28:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-19 22:28:44,465 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) [2022-03-19 22:28:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:28:45,588 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2022-03-19 22:28:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 22:28:45,588 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 [2022-03-19 22:28:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:28:45,589 INFO L225 Difference]: With dead ends: 211 [2022-03-19 22:28:45,589 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 22:28:45,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-03-19 22:28:45,590 INFO L913 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:28:45,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 74 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 22:28:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 22:28:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-03-19 22:28:45,607 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) [2022-03-19 22:28:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-03-19 22:28:45,608 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-03-19 22:28:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:28:45,608 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-03-19 22:28:45,609 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) [2022-03-19 22:28:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-03-19 22:28:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 22:28:45,613 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:28:45,613 INFO L499 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] [2022-03-19 22:28:45,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 22:28:45,813 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 [2022-03-19 22:28:45,814 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:28:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:28:45,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1102839803, now seen corresponding path program 5 times [2022-03-19 22:28:45,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:28:45,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444979735] [2022-03-19 22:28:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:28:45,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:28:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:28:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:28:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 22:28:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 22:28:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:28:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:28:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:28:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:28:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 22:28:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-19 22:28:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-19 22:28:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 22:28:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 22:28:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 22:28:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-19 22:28:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-19 22:28:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-19 22:28:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-03-19 22:28:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:28:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-03-19 22:28:46,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:28:46,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444979735] [2022-03-19 22:28:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444979735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:28:46,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54274772] [2022-03-19 22:28:46,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:28:46,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:28:46,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:28:46,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:28:46,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 22:29:22,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-03-19 22:29:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:29:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 22:29:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-19 22:29:22,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-03-19 22:29:23,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54274772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:23,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:23,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-19 22:29:23,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752992932] [2022-03-19 22:29:23,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:23,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 22:29:23,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:23,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 22:29:23,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 22:29:23,198 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) [2022-03-19 22:29:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:39,246 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2022-03-19 22:29:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 22:29:39,247 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 [2022-03-19 22:29:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:39,249 INFO L225 Difference]: With dead ends: 320 [2022-03-19 22:29:39,249 INFO L226 Difference]: Without dead ends: 287 [2022-03-19 22:29:39,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-03-19 22:29:39,251 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 555 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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 [2022-03-19 22:29:39,251 INFO L914 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] [2022-03-19 22:29:39,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-19 22:29:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-03-19 22:29:39,285 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) [2022-03-19 22:29:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-03-19 22:29:39,287 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-03-19 22:29:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:39,287 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-03-19 22:29:39,287 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) [2022-03-19 22:29:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-03-19 22:29:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-03-19 22:29:39,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:39,290 INFO L499 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] [2022-03-19 22:29:39,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:39,507 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 [2022-03-19 22:29:39,508 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1415471691, now seen corresponding path program 6 times [2022-03-19 22:29:39,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:39,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541444204] [2022-03-19 22:29:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:39,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-19 22:29:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 22:29:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 22:29:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:29:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:29:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:29:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:29:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 22:29:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-19 22:29:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-19 22:29:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 22:29:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 22:29:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 22:29:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-19 22:29:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-19 22:29:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-19 22:29:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-19 22:29:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-19 22:29:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-19 22:29:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-19 22:29:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-19 22:29:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-19 22:29:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-03-19 22:29:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-03-19 22:29:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-03-19 22:29:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-03-19 22:29:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-03-19 22:29:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-03-19 22:29:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-03-19 22:29:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-03-19 22:29:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-03-19 22:29:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-03-19 22:29:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-03-19 22:29:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-03-19 22:29:40,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541444204] [2022-03-19 22:29:40,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541444204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:40,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455302834] [2022-03-19 22:29:40,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:29:40,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:40,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:40,349 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:40,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process