/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 00:14:17,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 00:14:17,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 00:14:17,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 00:14:17,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-07 00:14:17,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-07 00:14:17,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-07 00:14:17,744 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-07 00:14:17,753 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 00:14:17,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 00:14:17,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 00:14:17,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 00:14:17,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 00:14:17,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 00:14:17,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 00:14:17,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 00:14:17,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 00:14:17,757 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 00:14:17,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 00:14:17,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 00:14:17,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 00:14:17,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-07 00:14:17,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 00:14:17,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:14:17,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 00:14:17,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-07 00:14:17,758 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-07 00:14:17,758 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-07 00:14:17,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 00:14:17,758 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-07 00:14:17,758 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 00:14:18,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 00:14:18,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 00:14:18,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 00:14:18,154 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 00:14:18,155 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 00:14:18,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound2.c [2022-04-07 00:14:18,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5086aee31/53342984d2eb420c96f7963853d15f57/FLAG6cbca5a05 [2022-04-07 00:14:18,743 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 00:14:18,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound2.c [2022-04-07 00:14:18,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5086aee31/53342984d2eb420c96f7963853d15f57/FLAG6cbca5a05 [2022-04-07 00:14:19,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5086aee31/53342984d2eb420c96f7963853d15f57 [2022-04-07 00:14:19,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 00:14:19,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 00:14:19,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 00:14:19,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 00:14:19,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 00:14:19,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28594ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19, skipping insertion in model container [2022-04-07 00:14:19,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 00:14:19,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 00:14:19,531 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound2.c[537,550] [2022-04-07 00:14:19,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:14:19,569 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 00:14:19,594 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound2.c[537,550] [2022-04-07 00:14:19,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:14:19,652 INFO L208 MainTranslator]: Completed translation [2022-04-07 00:14:19,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19 WrapperNode [2022-04-07 00:14:19,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 00:14:19,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 00:14:19,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 00:14:19,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 00:14:19,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 00:14:19,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 00:14:19,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 00:14:19,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 00:14:19,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19" (1/1) ... [2022-04-07 00:14:19,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:14:19,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:19,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-07 00:14:19,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-07 00:14:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 00:14:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 00:14:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 00:14:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-07 00:14:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-07 00:14:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 00:14:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 00:14:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 00:14:19,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 00:14:19,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 00:14:19,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 00:14:19,914 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 00:14:19,916 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 00:14:20,095 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 00:14:20,132 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 00:14:20,132 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 00:14:20,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:14:20 BoogieIcfgContainer [2022-04-07 00:14:20,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 00:14:20,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 00:14:20,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 00:14:20,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 00:14:20,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 12:14:19" (1/3) ... [2022-04-07 00:14:20,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63dec1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:14:20, skipping insertion in model container [2022-04-07 00:14:20,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:19" (2/3) ... [2022-04-07 00:14:20,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63dec1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:14:20, skipping insertion in model container [2022-04-07 00:14:20,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:14:20" (3/3) ... [2022-04-07 00:14:20,161 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound2.c [2022-04-07 00:14:20,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-07 00:14:20,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 00:14:20,273 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 00:14:20,292 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-07 00:14:20,293 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 00:14:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:14:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:14:20,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:20,317 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:20,318 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2022-04-07 00:14:20,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:20,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832943955] [2022-04-07 00:14:20,363 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 2 times [2022-04-07 00:14:20,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:20,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135011699] [2022-04-07 00:14:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:20,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:20,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:14:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:20,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:14:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:20,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:14:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:20,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-07 00:14:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:14:20,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:20,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135011699] [2022-04-07 00:14:20,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135011699] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:20,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:20,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:14:20,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:20,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832943955] [2022-04-07 00:14:20,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832943955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:20,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:20,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:14:20,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014148629] [2022-04-07 00:14:20,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:20,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-07 00:14:20,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:20,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-07 00:14:20,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 00:14:20,644 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:14:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:20,780 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-04-07 00:14:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-07 00:14:20,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-07 00:14:20,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:20,793 INFO L225 Difference]: With dead ends: 57 [2022-04-07 00:14:20,793 INFO L226 Difference]: Without dead ends: 27 [2022-04-07 00:14:20,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 00:14:20,803 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:20,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:14:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-07 00:14:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-07 00:14:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:14:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-07 00:14:20,845 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-04-07 00:14:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:20,845 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-07 00:14:20,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:14:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-07 00:14:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:14:20,848 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:20,848 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:20,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 00:14:20,849 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2022-04-07 00:14:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067234461] [2022-04-07 00:14:20,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 2 times [2022-04-07 00:14:20,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:20,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527036884] [2022-04-07 00:14:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:20,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:20,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625300155] [2022-04-07 00:14:20,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:14:20,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:20,916 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:14:20,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-07 00:14:20,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-07 00:14:20,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-07 00:14:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:14:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:14:21,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:14:21,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:21,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527036884] [2022-04-07 00:14:21,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:14:21,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625300155] [2022-04-07 00:14:21,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625300155] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:21,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:21,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:14:21,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:21,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067234461] [2022-04-07 00:14:21,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067234461] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:21,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:21,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:14:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020839011] [2022-04-07 00:14:21,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:21,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:14:21,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:14:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:14:21,114 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:14:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:21,160 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-04-07 00:14:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:14:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-07 00:14:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:21,162 INFO L225 Difference]: With dead ends: 39 [2022-04-07 00:14:21,162 INFO L226 Difference]: Without dead ends: 37 [2022-04-07 00:14:21,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:14:21,164 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:21,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 87 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:14:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-07 00:14:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-04-07 00:14:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:14:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-07 00:14:21,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-04-07 00:14:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:21,174 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-07 00:14:21,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:14:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-07 00:14:21,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-07 00:14:21,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:21,175 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:21,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-07 00:14:21,396 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 [2022-04-07 00:14:21,397 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:21,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 1 times [2022-04-07 00:14:21,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:21,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [598903098] [2022-04-07 00:14:21,398 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:21,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 2 times [2022-04-07 00:14:21,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:21,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373001268] [2022-04-07 00:14:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:21,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:21,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:21,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434588055] [2022-04-07 00:14:21,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:14:21,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:21,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:21,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:14:21,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-07 00:14:21,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:14:21,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:21,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-07 00:14:21,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:14:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:14:21,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:14:21,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:21,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373001268] [2022-04-07 00:14:21,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:14:21,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434588055] [2022-04-07 00:14:21,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434588055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:21,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:21,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:14:21,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:21,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [598903098] [2022-04-07 00:14:21,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [598903098] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:21,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:21,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:14:21,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585151792] [2022-04-07 00:14:21,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:21,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:14:21,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:21,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:14:21,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:14:21,684 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:14:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:21,824 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-04-07 00:14:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:14:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-07 00:14:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:21,826 INFO L225 Difference]: With dead ends: 43 [2022-04-07 00:14:21,826 INFO L226 Difference]: Without dead ends: 36 [2022-04-07 00:14:21,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:14:21,828 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:21,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:14:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-07 00:14:21,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-04-07 00:14:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:14:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-07 00:14:21,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-04-07 00:14:21,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:21,848 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-07 00:14:21,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:14:21,848 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-07 00:14:21,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-07 00:14:21,849 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:21,849 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:21,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-07 00:14:22,050 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 [2022-04-07 00:14:22,051 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 1 times [2022-04-07 00:14:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:22,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1207355199] [2022-04-07 00:14:22,057 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:22,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 2 times [2022-04-07 00:14:22,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:22,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705940974] [2022-04-07 00:14:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:22,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:22,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:22,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864479802] [2022-04-07 00:14:22,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:14:22,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:22,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:22,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:14:22,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-07 00:14:22,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:14:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:22,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-07 00:14:22,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:14:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:14:23,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:14:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:14:25,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:25,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705940974] [2022-04-07 00:14:25,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:14:25,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864479802] [2022-04-07 00:14:25,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864479802] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-07 00:14:25,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:14:25,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 15 [2022-04-07 00:14:25,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:25,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1207355199] [2022-04-07 00:14:25,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1207355199] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:25,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:25,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:14:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495873563] [2022-04-07 00:14:25,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:25,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:14:25,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:14:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:14:25,144 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:14:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:26,066 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-04-07 00:14:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-07 00:14:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-04-07 00:14:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:26,069 INFO L225 Difference]: With dead ends: 47 [2022-04-07 00:14:26,069 INFO L226 Difference]: Without dead ends: 45 [2022-04-07 00:14:26,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-04-07 00:14:26,070 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:26,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 100 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-07 00:14:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-07 00:14:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-04-07 00:14:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:14:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-04-07 00:14:26,095 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 37 [2022-04-07 00:14:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:26,096 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-04-07 00:14:26,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:14:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-04-07 00:14:26,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-07 00:14:26,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:26,108 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:26,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-07 00:14:26,323 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 [2022-04-07 00:14:26,324 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:26,324 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 1 times [2022-04-07 00:14:26,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:26,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1941759136] [2022-04-07 00:14:26,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:26,325 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 2 times [2022-04-07 00:14:26,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:26,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980667591] [2022-04-07 00:14:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:26,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:26,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:26,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936775304] [2022-04-07 00:14:26,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:14:26,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:26,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:26,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:14:26,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-07 00:14:26,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:14:26,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:26,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-07 00:14:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:14:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:14:26,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:14:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:14:27,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:27,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980667591] [2022-04-07 00:14:27,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:14:27,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936775304] [2022-04-07 00:14:27,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936775304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:14:27,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:14:27,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-04-07 00:14:27,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:27,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1941759136] [2022-04-07 00:14:27,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1941759136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:27,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:27,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-07 00:14:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13248455] [2022-04-07 00:14:27,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:27,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-07 00:14:27,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-07 00:14:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:14:27,341 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:14:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:27,538 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-04-07 00:14:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:14:27,539 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2022-04-07 00:14:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:27,541 INFO L225 Difference]: With dead ends: 65 [2022-04-07 00:14:27,541 INFO L226 Difference]: Without dead ends: 53 [2022-04-07 00:14:27,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:14:27,542 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:27,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 107 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:14:27,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-07 00:14:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-07 00:14:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:14:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2022-04-07 00:14:27,576 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 37 [2022-04-07 00:14:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:27,576 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2022-04-07 00:14:27,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:14:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2022-04-07 00:14:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-07 00:14:27,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:27,577 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:27,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-07 00:14:27,804 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 [2022-04-07 00:14:27,805 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 1 times [2022-04-07 00:14:27,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:27,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1802145442] [2022-04-07 00:14:27,806 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:27,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 2 times [2022-04-07 00:14:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:27,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484779294] [2022-04-07 00:14:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:27,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:27,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596240947] [2022-04-07 00:14:27,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:14:27,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:27,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:27,832 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:14:27,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-07 00:14:27,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:14:27,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-07 00:14:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:14:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-07 00:14:28,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:14:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-07 00:14:28,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:28,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484779294] [2022-04-07 00:14:28,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:14:28,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596240947] [2022-04-07 00:14:28,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596240947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:14:28,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:14:28,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-07 00:14:28,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:28,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1802145442] [2022-04-07 00:14:28,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1802145442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:28,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:28,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:14:28,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139607464] [2022-04-07 00:14:28,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:28,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:14:28,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:28,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:14:28,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:14:28,453 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:14:30,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:14:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:30,641 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2022-04-07 00:14:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:14:30,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-04-07 00:14:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:30,643 INFO L225 Difference]: With dead ends: 60 [2022-04-07 00:14:30,643 INFO L226 Difference]: Without dead ends: 53 [2022-04-07 00:14:30,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:14:30,644 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:30,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 120 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-07 00:14:30,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-07 00:14:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-04-07 00:14:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:14:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-04-07 00:14:30,664 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 43 [2022-04-07 00:14:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:30,665 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-04-07 00:14:30,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:14:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-04-07 00:14:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-07 00:14:30,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:30,666 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:30,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-07 00:14:30,895 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 [2022-04-07 00:14:30,896 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1494691206, now seen corresponding path program 1 times [2022-04-07 00:14:30,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:30,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966840591] [2022-04-07 00:14:30,897 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:30,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1494691206, now seen corresponding path program 2 times [2022-04-07 00:14:30,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:30,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801324921] [2022-04-07 00:14:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:30,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:30,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:30,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80883056] [2022-04-07 00:14:30,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:14:30,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:30,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:30,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:14:31,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-07 00:14:31,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:14:31,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:31,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-07 00:14:31,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:14:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-07 00:14:31,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:14:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-07 00:14:31,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:31,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801324921] [2022-04-07 00:14:31,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:14:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80883056] [2022-04-07 00:14:31,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80883056] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:14:31,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:14:31,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-07 00:14:31,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966840591] [2022-04-07 00:14:31,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966840591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:31,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:31,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:14:31,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630105978] [2022-04-07 00:14:31,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:31,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:14:31,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:14:31,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:14:31,803 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:14:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:31,896 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2022-04-07 00:14:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:14:31,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-04-07 00:14:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:31,898 INFO L225 Difference]: With dead ends: 70 [2022-04-07 00:14:31,898 INFO L226 Difference]: Without dead ends: 39 [2022-04-07 00:14:31,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:14:31,899 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:31,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 101 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:14:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-07 00:14:31,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-07 00:14:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0) internal successors, (26), 26 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:14:31,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-04-07 00:14:31,916 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 46 [2022-04-07 00:14:31,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:31,916 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-04-07 00:14:31,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:14:31,917 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-04-07 00:14:31,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-07 00:14:31,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:31,917 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:31,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-07 00:14:32,143 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 [2022-04-07 00:14:32,144 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash 4200374, now seen corresponding path program 3 times [2022-04-07 00:14:32,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:32,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2114159188] [2022-04-07 00:14:32,145 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:32,145 INFO L85 PathProgramCache]: Analyzing trace with hash 4200374, now seen corresponding path program 4 times [2022-04-07 00:14:32,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:32,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658444102] [2022-04-07 00:14:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:32,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:32,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:32,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696162943] [2022-04-07 00:14:32,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:14:32,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:32,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:32,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:14:32,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-07 00:14:32,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:14:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:32,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-07 00:14:32,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:14:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-07 00:14:33,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:14:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-07 00:14:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:36,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658444102] [2022-04-07 00:14:36,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:14:36,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696162943] [2022-04-07 00:14:36,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696162943] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:14:36,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:14:36,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 19 [2022-04-07 00:14:36,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:36,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2114159188] [2022-04-07 00:14:36,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2114159188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:36,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:36,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:14:36,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123800154] [2022-04-07 00:14:36,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:36,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:14:36,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:36,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:14:36,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2022-04-07 00:14:36,886 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:14:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:37,060 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-04-07 00:14:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:14:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-04-07 00:14:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:37,061 INFO L225 Difference]: With dead ends: 39 [2022-04-07 00:14:37,061 INFO L226 Difference]: Without dead ends: 0 [2022-04-07 00:14:37,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=74, Invalid=345, Unknown=1, NotChecked=0, Total=420 [2022-04-07 00:14:37,062 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:37,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 129 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:14:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-07 00:14:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-07 00:14:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-07 00:14:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-07 00:14:37,064 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2022-04-07 00:14:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:37,064 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-07 00:14:37,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:14:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-07 00:14:37,064 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 00:14:37,066 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-07 00:14:37,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-07 00:14:37,275 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 [2022-04-07 00:14:37,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-07 00:14:46,277 WARN L232 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 76 DAG size of output: 29 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-07 00:14:50,875 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 6) no Hoare annotation was computed. [2022-04-07 00:14:50,875 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 6) no Hoare annotation was computed. [2022-04-07 00:14:50,875 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 6) no Hoare annotation was computed. [2022-04-07 00:14:50,875 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-04-07 00:14:50,875 INFO L878 garLoopResultBuilder]: At program point L10(line 10) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-07 00:14:50,875 INFO L878 garLoopResultBuilder]: At program point L10-2(lines 9 11) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-07 00:14:50,875 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 9 11) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-07 00:14:50,876 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-04-07 00:14:50,876 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~b~0 2) (<= 0 main_~b~0)) [2022-04-07 00:14:50,876 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-04-07 00:14:50,876 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true [2022-04-07 00:14:50,876 INFO L885 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: true [2022-04-07 00:14:50,876 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-04-07 00:14:50,876 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true [2022-04-07 00:14:50,876 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (.cse2 (<= main_~b~0 2)) (.cse3 (<= 1 main_~b~0))) (or (and .cse0 (<= main_~y~0 2) (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0)) (let ((.cse1 (+ main_~y~0 1))) (and (<= 1 (mod .cse1 2)) .cse0 .cse2 .cse3 (<= 0 .cse1) (<= main_~y~0 1))) (and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) .cse2 (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) .cse3))) [2022-04-07 00:14:50,876 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= main_~z~0 .cse0) (<= main_~b~0 2) (<= 1 main_~b~0) (or (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0) (= .cse0 (+ (* main_~x~0 2) (* 2 (* (div main_~y~0 2) main_~x~0)) main_~z~0))))) [2022-04-07 00:14:50,876 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-04-07 00:14:50,876 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (and (<= main_~b~0 2) (<= 1 main_~b~0)) [2022-04-07 00:14:50,877 INFO L878 garLoopResultBuilder]: At program point L39(lines 39 42) the Hoare annotation is: (let ((.cse0 (<= 1 main_~b~0))) (or (and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (<= main_~b~0 2) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) .cse0) (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (<= main_~y~0 2) (= main_~b~0 main_~y~0) .cse0 (= main_~a~0 main_~x~0)))) [2022-04-07 00:14:50,877 INFO L878 garLoopResultBuilder]: At program point L39-2(lines 39 42) the Hoare annotation is: (let ((.cse1 (<= 1 main_~b~0))) (or (let ((.cse0 (+ main_~y~0 1))) (and (<= 1 (mod .cse0 2)) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (<= main_~b~0 2) .cse1 (<= 0 .cse0) (<= main_~y~0 1))) (and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (<= main_~y~0 2) (= main_~b~0 main_~y~0) .cse1 (= main_~a~0 main_~x~0)))) [2022-04-07 00:14:50,877 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (.cse2 (<= main_~b~0 2)) (.cse3 (<= 1 main_~b~0))) (or (and .cse0 (<= main_~y~0 2) (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0)) (let ((.cse1 (+ main_~y~0 1))) (and (<= 1 (mod .cse1 2)) .cse0 .cse2 .cse3 (<= 0 .cse1) (<= main_~y~0 1))) (and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) .cse2 (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) .cse3))) [2022-04-07 00:14:50,877 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0)) (.cse1 (<= main_~b~0 2)) (.cse2 (<= 1 main_~b~0))) (or (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= main_~y~0 2) (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0)) (and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) .cse1 (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) .cse2) (let ((.cse3 (+ main_~y~0 1))) (and (<= 1 (mod .cse3 2)) (= main_~z~0 .cse0) .cse1 .cse2 (<= 0 .cse3) (<= main_~y~0 1))))) [2022-04-07 00:14:50,877 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-07 00:14:50,877 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-07 00:14:50,877 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-07 00:14:50,877 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-07 00:14:50,877 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-07 00:14:50,877 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-07 00:14:50,877 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-07 00:14:50,878 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-04-07 00:14:50,878 INFO L878 garLoopResultBuilder]: At program point L14(lines 14 15) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-07 00:14:50,878 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 16) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-07 00:14:50,878 INFO L878 garLoopResultBuilder]: At program point L13-2(lines 12 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-07 00:14:50,878 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 12 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-07 00:14:50,878 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-07 00:14:50,881 INFO L719 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2, 2, 2] [2022-04-07 00:14:50,881 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-07 00:14:50,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.04 12:14:50 BoogieIcfgContainer [2022-04-07 00:14:50,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-07 00:14:50,927 INFO L158 Benchmark]: Toolchain (without parser) took 31697.95ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 151.8MB in the beginning and 74.9MB in the end (delta: 76.8MB). Peak memory consumption was 112.5MB. Max. memory is 8.0GB. [2022-04-07 00:14:50,928 INFO L158 Benchmark]: CDTParser took 8.24ms. Allocated memory is still 176.2MB. Free memory is still 138.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-07 00:14:50,928 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.65ms. Allocated memory is still 176.2MB. Free memory was 151.3MB in the beginning and 150.4MB in the end (delta: 857.2kB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-04-07 00:14:50,928 INFO L158 Benchmark]: Boogie Preprocessor took 44.83ms. Allocated memory is still 176.2MB. Free memory was 150.4MB in the beginning and 148.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-07 00:14:50,929 INFO L158 Benchmark]: RCFGBuilder took 435.16ms. Allocated memory is still 176.2MB. Free memory was 148.8MB in the beginning and 138.7MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-07 00:14:50,929 INFO L158 Benchmark]: TraceAbstraction took 30780.12ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 138.3MB in the beginning and 74.9MB in the end (delta: 63.4MB). Peak memory consumption was 98.4MB. Max. memory is 8.0GB. [2022-04-07 00:14:50,930 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 8.24ms. Allocated memory is still 176.2MB. Free memory is still 138.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 413.65ms. Allocated memory is still 176.2MB. Free memory was 151.3MB in the beginning and 150.4MB in the end (delta: 857.2kB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.83ms. Allocated memory is still 176.2MB. Free memory was 150.4MB in the beginning and 148.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 435.16ms. Allocated memory is still 176.2MB. Free memory was 148.8MB in the beginning and 138.7MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 30780.12ms. Allocated memory was 176.2MB in the beginning and 211.8MB in the end (delta: 35.7MB). Free memory was 138.3MB in the beginning and 74.9MB in the end (delta: 63.4MB). Peak memory consumption was 98.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.6s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 130 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 119 mSDsluCounter, 767 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 573 mSDsCounter, 43 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 643 IncrementalHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 43 mSolverCounterUnsat, 194 mSDtfsCounter, 643 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 501 GetRequests, 406 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=5, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 114 PreInvPairs, 163 NumberOfFragments, 464 HoareAnnotationTreeSize, 114 FomulaSimplifications, 123 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 32 FomulaSimplificationsInter, 769 FormulaSimplificationTreeSizeReductionInter, 13.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((z + y * x == b * a && y <= 2) && b == y) && 1 <= y) && a == x) || (((((1 <= (y + 1) % 2 && z + y * x == b * a) && b <= 2) && 1 <= b) && 0 <= y + 1) && y <= 1)) || (((((z == 0 && y == b / 2) && b <= 2) && a * 2 == x) && !(b % 2 == 1)) && 1 <= b) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-07 00:14:50,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...